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https://github.blog/wp-content/uploads/2024/07/Screenshot-2024-07-23-at-8.43.47 AM.png?w=516 516w" sizes="(max-width: 800px) 100vw, 800px" /></div><a href="https://resources.github.com/artificial-intelligence/how-enterprise-engineering-teams-can-successfully-adopt-ai/" class="d-block mb-2 f3 lh-condensed color-fg-default text-bold card__link">How enterprise engineering teams can successfully adopt AI</a><p class="mb-3 f5 color-fg-muted">Learn how to bring AI to your engineering teams and maximize the value that you get from it.</p><span class="Link d-inline-flex flex-items-center" role="presentation">Learn more<svg xmlns="http://www.w3.org/2000/svg" class="octicon d-block ml-1 mt-1" viewBox="0 0 12 12" width="12" height="12"><path d="M4.7 10c-.2 0-.4-.1-.5-.2-.3-.3-.3-.8 0-1.1L6.9 6 4.2 3.3c-.3-.3-.3-.8 0-1.1.3-.3.8-.3 1.1 0l3.3 3.2c.3.3.3.8 0 1.1L5.3 9.7c-.2.2-.4.3-.6.3Z"></path></svg></span></li> </ul> </li> <li id="menu-item-78840"><a href="https://github.blog/news-insights/" 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srcset="https://github.blog/wp-content/uploads/2024/07/Screenshot-2024-07-23-at-8.44.23 AM.png?w=300 300w, https://github.blog/wp-content/uploads/2024/07/Screenshot-2024-07-23-at-8.44.23 AM.png?w=800 800w, https://github.blog/wp-content/uploads/2024/07/Screenshot-2024-07-23-at-8.44.23 AM.png?w=400 400w, https://github.blog/wp-content/uploads/2024/07/Screenshot-2024-07-23-at-8.44.23 AM.png?w=1032 1032w, https://github.blog/wp-content/uploads/2024/07/Screenshot-2024-07-23-at-8.44.23 AM.png?w=516 516w" sizes="(max-width: 800px) 100vw, 800px" /></div><a href="https://github.blog/ai-and-ml/llms/unlocking-the-power-of-unstructured-data-with-rag/" class="d-block mb-2 f3 lh-condensed color-fg-default text-bold card__link">Unlocking the power of unstructured data with RAG</a><p class="mb-3 f5 color-fg-muted">Learn how to use retrieval-augmented generation (RAG) to capture more insights.</p><span class="Link d-inline-flex flex-items-center" role="presentation">Learn more<svg 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/> </div> <div class="col- mt-3 mt-md-0 mb-md-3"> <h1 class="h3-mktg color-fg-default"> Kevin Backhouse </h1> <p class="mt-3 color-fg-default"> <a href="https://github.com/kevinbackhouse" target="_blank">@kevinbackhouse</a> </p> <div class="mt-3 text-semibold"> <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd"> <html><body><p>I’m a security researcher on the GitHub Security Lab team. I try to help make open source software more secure by searching for vulnerabilities and working with maintainers to get them fixed.</p> </body></html> </div> </div> </div> </div> </div> </div> </div> <div class="container-xl mx-auto p-responsive-blog"> <h2 class="h5-mktg mb-4 mb-lg-7 pb-3 border-bottom color-border-subtle"> Posts by this author </h2> <div class="mb-8 mb-lg-10"> <div class="post-columns post-columns--1-1-3-3"> <article class="d-flex flex-wrap gutter-spacious color-border-muted card"> <div class="col-12 col-lg-5"> <div class="d-lg-none mb-3"> <div class="d-block position-relative rounded-2 overflow-hidden tease-thumbnail"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="800" height="425" src="https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?resize=800%2C425" class="d-block tease-thumbnail__img cover-image wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?w=300 300w, https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?w=800 800w, https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?w=400 400w, https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?w=1032 1032w, https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?w=516 516w" sizes="(max-width: 800px) 100vw, 800px" /> </div> </div> <div class="mb-1"><a href="https://github.blog/security/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Security</a></div> <h3 class="h4-mktg mb-3"> <a href="https://github.blog/security/supply-chain-security/how-to-stay-safe-from-repo-jacking/" class="Link--primary card__link"> How to stay safe from repo-jacking </a> </h3> <div class="mb-2 f4-mktg color-fg-muted"> <p>Repo-jacking is a specific type of supply chain attack. This blog post explains what it is, what the risk is, and what you can do to stay safe.</p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <div class="d-flex flex-items-center mr-3"> <a href="https://github.blog/author/kevinbackhouse/" class="d-block post-author-avatar position-relative z-2"> <img alt='Avatar photo' src='https://avatars.githubusercontent.com/u/4358136?v=4&s=40' srcset='https://avatars.githubusercontent.com/u/4358136?v=4&s=80 2x' class='avatar avatar-40 photo d-block circle' height='40' width='40' loading='lazy' decoding='async'/> </a> </div> <span> <span class="text-bold"> <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2024-02-21" class="text-mono color-fg-muted no-wrap">February 21, 2024</time> </span> </div> </footer> </div> <div class="d-none d-lg-block col-lg-7"> <div class="d-block position-relative rounded-2 overflow-hidden tease-thumbnail"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="800" height="425" src="https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?resize=800%2C425" class="d-block tease-thumbnail__img cover-image wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?w=300 300w, https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?w=800 800w, https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?w=400 400w, https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?w=1032 1032w, https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?w=516 516w" sizes="(max-width: 800px) 100vw, 800px" /> </div> </div> </article> <article class="color-border-muted card"> <div class="d-flex flex-column"> <div class="d-block col-12 position-relative rounded-2 mb-3 overflow-hidden tease-thumbnail" target="_self"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="400" height="212" src="https://github.blog/wp-content/uploads/2023/12/cueing-up-a-calculator.jpeg?resize=400%2C212" class="d-block cover-image tease-thumbnail__img wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2023/12/cueing-up-a-calculator.jpeg?w=300 300w, https://github.blog/wp-content/uploads/2023/12/cueing-up-a-calculator.jpeg?w=1600 1600w, https://github.blog/wp-content/uploads/2023/12/cueing-up-a-calculator.jpeg?w=800 800w, https://github.blog/wp-content/uploads/2023/12/cueing-up-a-calculator.jpeg?w=400 400w, https://github.blog/wp-content/uploads/2023/12/cueing-up-a-calculator.jpeg?w=1032 1032w, https://github.blog/wp-content/uploads/2023/12/cueing-up-a-calculator.jpeg?w=516 516w, https://github.blog/wp-content/uploads/2023/12/cueing-up-a-calculator.jpeg?zoom=3&resize=400%2C212 1200w" sizes="(max-width: 400px) 100vw, 400px" /> </div> <div class="mb-1"><a href="https://github.blog/security/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Security</a></div> <h3 class="h6-mktg mb-2"> <a class="Link--primary card__link" href="https://github.blog/security/vulnerability-research/cueing-up-a-calculator-an-introduction-to-exploit-development-on-linux/" target="_self"> Cueing up a calculator: an introduction to exploit development on Linux </a> </h3> <div class="f4-mktg color-fg-muted"> <p>Using CVE-2023-43641 as an example, I’ll explain how to develop an exploit for a memory corruption vulnerability on Linux. The exploit has to bypass several mitigations to achieve code execution.</p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <span> <span class="text-bold"> <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2023-12-06" class="text-mono color-fg-muted no-wrap">December 6, 2023</time> </span> </div> </footer> </div> </article> <article class="color-border-muted card"> <div class="d-flex flex-column"> <div class="d-block col-12 position-relative rounded-2 mb-3 overflow-hidden tease-thumbnail" target="_self"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="400" height="212" src="https://github.blog/wp-content/uploads/2023/10/Security-DarkMode-4.png?resize=400%2C212" class="d-block cover-image tease-thumbnail__img wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2023/10/Security-DarkMode-4.png?w=300 300w, https://github.blog/wp-content/uploads/2023/10/Security-DarkMode-4.png?w=800 800w, https://github.blog/wp-content/uploads/2023/10/Security-DarkMode-4.png?w=400 400w, https://github.blog/wp-content/uploads/2023/10/Security-DarkMode-4.png?w=1032 1032w, https://github.blog/wp-content/uploads/2023/10/Security-DarkMode-4.png?w=516 516w, https://github.blog/wp-content/uploads/2023/10/Security-DarkMode-4.png?zoom=3&resize=400%2C212 1200w" sizes="(max-width: 400px) 100vw, 400px" /> </div> <div class="mb-1"><a href="https://github.blog/security/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Security</a></div> <h3 class="h6-mktg mb-2"> <a class="Link--primary card__link" href="https://github.blog/security/vulnerability-research/coordinated-disclosure-1-click-rce-on-gnome-cve-2023-43641/" target="_self"> Coordinated Disclosure: 1-Click RCE on GNOME (CVE-2023-43641) </a> </h3> <div class="f4-mktg color-fg-muted"> <p>CVE-2023-43641 is a vulnerability in libcue, which can lead to code execution by downloading a file on GNOME.</p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <span> <span class="text-bold"> <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2023-10-09" class="text-mono color-fg-muted no-wrap">October 9, 2023</time> </span> </div> </footer> </div> </article> <article class="color-border-muted card"> <div class="d-flex flex-column"> <div class="d-block col-12 position-relative rounded-2 mb-3 overflow-hidden tease-thumbnail" target="_self"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="400" height="212" src="https://github.blog/wp-content/uploads/2023/05/1200.630-Security-wLogo.png?resize=400%2C212" class="d-block cover-image tease-thumbnail__img wp-post-image" alt="Image of the GitHub logo with a blue gradient background" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2023/05/1200.630-Security-wLogo.png?w=300 300w, https://github.blog/wp-content/uploads/2023/05/1200.630-Security-wLogo.png?w=800 800w, https://github.blog/wp-content/uploads/2023/05/1200.630-Security-wLogo.png?w=400 400w, https://github.blog/wp-content/uploads/2023/05/1200.630-Security-wLogo.png?w=1032 1032w, https://github.blog/wp-content/uploads/2023/05/1200.630-Security-wLogo.png?w=516 516w, https://github.blog/wp-content/uploads/2023/05/1200.630-Security-wLogo.png?zoom=3&resize=400%2C212 1200w" sizes="(max-width: 400px) 100vw, 400px" /> </div> <div class="mb-1"><a href="https://github.blog/security/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Security</a></div> <h3 class="h6-mktg mb-2"> <a class="Link--primary card__link" href="https://github.blog/security/supply-chain-security/four-tips-to-keep-your-github-actions-workflows-secure/" target="_self"> Four tips to keep your GitHub Actions workflows secure </a> </h3> <div class="f4-mktg color-fg-muted"> <p>Researchers from Purdue and NCSU have found a large number of command injection vulnerabilities in the workflows of projects on GitHub. Follow these four tips to keep your GitHub Actions workflows secure.</p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <span> <span class="text-bold"> <a href="https://github.blog/author/jarlob/" title="Posts by Jaroslav Lobacevski" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Jaroslav Lobacevski</a> & <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2023-08-09" class="text-mono color-fg-muted no-wrap">August 9, 2023</time> </span> </div> </footer> </div> </article> <article class="color-border-muted card"> <div class="d-flex flex-column"> <div class="d-block col-12 position-relative rounded-2 mb-3 overflow-hidden tease-thumbnail" target="_self"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="400" height="212" src="https://github.blog/wp-content/uploads/2023/05/redos-header.png?resize=400%2C212" class="d-block cover-image tease-thumbnail__img wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2023/05/redos-header.png?w=300 300w, https://github.blog/wp-content/uploads/2023/05/redos-header.png?w=1600 1600w, https://github.blog/wp-content/uploads/2023/05/redos-header.png?w=800 800w, https://github.blog/wp-content/uploads/2023/05/redos-header.png?w=400 400w, https://github.blog/wp-content/uploads/2023/05/redos-header.png?w=1032 1032w, https://github.blog/wp-content/uploads/2023/05/redos-header.png?w=516 516w, https://github.blog/wp-content/uploads/2023/05/redos-header.png?zoom=3&resize=400%2C212 1200w" sizes="(max-width: 400px) 100vw, 400px" /> </div> <div class="mb-1"><a href="https://github.blog/security/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Security</a></div> <h3 class="h6-mktg mb-2"> <a class="Link--primary card__link" href="https://github.blog/security/how-to-fix-a-redos/" target="_self"> How to fix a ReDoS </a> </h3> <div class="f4-mktg color-fg-muted"> <p>Code scanning detects ReDoS vulnerabilities automatically, but fixing them isn’t always easy. This blog post describes a 4-step strategy for fixing ReDoS bugs.</p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <span> <span class="text-bold"> <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2023-05-09" class="text-mono color-fg-muted no-wrap">May 9, 2023</time> </span> </div> </footer> </div> </article> <article class="color-border-muted card"> <div class="d-flex flex-column"> <div class="d-block col-12 position-relative rounded-2 mb-3 overflow-hidden tease-thumbnail" target="_self"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="400" height="212" src="https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?resize=400%2C212" class="d-block cover-image tease-thumbnail__img wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?w=300 300w, https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?w=800 800w, https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?w=400 400w, https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?w=1032 1032w, https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?w=516 516w, https://github.blog/wp-content/uploads/2024/02/Security-DarkMode-2-2.png?zoom=3&resize=400%2C212 1200w" sizes="(max-width: 400px) 100vw, 400px" /> </div> <div class="mb-1"><a href="https://github.blog/security/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Security</a></div> <h3 class="h6-mktg mb-2"> <a class="Link--primary card__link" href="https://github.blog/security/vulnerability-research/getting-root-on-ubuntu-through-wishful-thinking/" target="_self"> Getting root on Ubuntu through wishful thinking </a> </h3> <div class="f4-mktg color-fg-muted"> <p>How to exploit a double-free vulnerability in Ubuntu’s accountsservice (CVE-2021-3939)</p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <span> <span class="text-bold"> <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2021-12-13" class="text-mono color-fg-muted no-wrap">December 13, 2021</time> </span> </div> </footer> </div> </article> <article class="color-border-muted card"> <div class="d-flex flex-column"> <div class="d-block col-12 position-relative rounded-2 mb-3 overflow-hidden tease-thumbnail" target="_self"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="400" height="212" src="https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?resize=400%2C212" class="d-block cover-image tease-thumbnail__img wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=300 300w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=800 800w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=400 400w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=1032 1032w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=516 516w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?zoom=3&resize=400%2C212 1200w" sizes="(max-width: 400px) 100vw, 400px" /> </div> <div class="mb-1"><a href="https://github.blog/open-source/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Open Source</a></div> <h3 class="h6-mktg mb-2"> <a class="Link--primary card__link" href="https://github.blog/open-source/how-to-squash-bugs-by-enrolling-in-oss-fuzz/" target="_self"> Blue-teaming for Exiv2: how to squash bugs by enrolling in OSS-Fuzz </a> </h3> <div class="f4-mktg color-fg-muted"> <p>OSS-Fuzz is Google’s awesome fuzzing service for open source projects. GitHub Security Lab’s @kevinbackhouse describes enrolling a project.</p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <span> <span class="text-bold"> <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2021-11-23" class="text-mono color-fg-muted no-wrap">November 23, 2021</time> </span> </div> </footer> </div> </article> <article class="color-border-muted card"> <div class="d-flex flex-column"> <div class="d-block col-12 position-relative rounded-2 mb-3 overflow-hidden tease-thumbnail" target="_self"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="400" height="212" src="https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?resize=400%2C212" class="d-block cover-image tease-thumbnail__img wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=300 300w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=800 800w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=400 400w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=1032 1032w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=516 516w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?zoom=3&resize=400%2C212 1200w" sizes="(max-width: 400px) 100vw, 400px" /> </div> <div class="mb-1"><a href="https://github.blog/security/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Security</a></div> <h3 class="h6-mktg mb-2"> <a class="Link--primary card__link" href="https://github.blog/security/vulnerability-research/adding-custom-codeql-queries-code-scanning/" target="_self"> Blue-teaming for Exiv2: adding custom CodeQL queries to code scanning </a> </h3> <div class="f4-mktg color-fg-muted"> <p>The Exiv2 team tightened our security by enabling GitHub’s code scanning feature and adding custom queries tailored to the Exiv2 code base.</p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <span> <span class="text-bold"> <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2021-11-16" class="text-mono color-fg-muted no-wrap">November 16, 2021</time> </span> </div> </footer> </div> </article> <article class="color-border-muted card"> <div class="d-flex flex-column"> <div class="d-block col-12 position-relative rounded-2 mb-3 overflow-hidden tease-thumbnail" target="_self"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="400" height="212" src="https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?resize=400%2C212" class="d-block cover-image tease-thumbnail__img wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=300 300w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=800 800w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=400 400w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=1032 1032w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=516 516w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?zoom=3&resize=400%2C212 1200w" sizes="(max-width: 400px) 100vw, 400px" /> </div> <div class="mb-1"><a href="https://github.blog/open-source/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Open Source</a></div> <h3 class="h6-mktg mb-2"> <a class="Link--primary card__link" href="https://github.blog/open-source/three-rules-bug-fixing-better-oss-security/" target="_self"> Blue-teaming for Exiv2: three rules of bug fixing for better OSS security </a> </h3> <div class="f4-mktg color-fg-muted"> <p>When you’re fixing a bug, especially a security vulnerability, you should add a regression test, fix the bug, and find & fix variants. </p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <span> <span class="text-bold"> <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2021-11-09" class="text-mono color-fg-muted no-wrap">November 9, 2021</time> </span> </div> </footer> </div> </article> <article class="color-border-muted card"> <div class="d-flex flex-column"> <div class="d-block col-12 position-relative rounded-2 mb-3 overflow-hidden tease-thumbnail" target="_self"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="400" height="212" src="https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?resize=400%2C212" class="d-block cover-image tease-thumbnail__img wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=300 300w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=800 800w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=400 400w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=1032 1032w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=516 516w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?zoom=3&resize=400%2C212 1200w" sizes="(max-width: 400px) 100vw, 400px" /> </div> <div class="mb-1"><a href="https://github.blog/security/application-security/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Application security</a></div> <h3 class="h6-mktg mb-2"> <a class="Link--primary card__link" href="https://github.blog/security/application-security/blue-teaming-create-security-advisory-process/" target="_self"> Blue-teaming for Exiv2: creating a security advisory process </a> </h3> <div class="f4-mktg color-fg-muted"> <p>This blog post is the first in a series about hardening the security of the Exiv2 project. My goal is to share tips that will help you harden the security of your own project.</p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <span> <span class="text-bold"> <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2021-11-02" class="text-mono color-fg-muted no-wrap">November 2, 2021</time> </span> </div> </footer> </div> </article> <article class="color-border-muted card"> <div class="d-flex flex-column"> <div class="d-block col-12 position-relative rounded-2 mb-3 overflow-hidden tease-thumbnail" target="_self"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="400" height="212" src="https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?resize=400%2C212" class="d-block cover-image tease-thumbnail__img wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=300 300w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=800 800w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=400 400w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=1032 1032w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?w=516 516w, https://github.blog/wp-content/uploads/2019/09/security-1200-630.png?zoom=3&resize=400%2C212 1200w" sizes="(max-width: 400px) 100vw, 400px" /> </div> <div class="mb-1"><a href="https://github.blog/security/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Security</a></div> <h3 class="h6-mktg mb-2"> <a class="Link--primary card__link" href="https://github.blog/security/vulnerability-research/privilege-escalation-polkit-root-on-linux-with-bug/" target="_self"> Privilege escalation with polkit: How to get root on Linux with a seven-year-old bug </a> </h3> <div class="f4-mktg color-fg-muted"> <p>polkit is a system service installed by default on many Linux distributions. It’s used by systemd, so any Linux distribution that uses systemd also uses polkit.</p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <span> <span class="text-bold"> <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2021-06-10" class="text-mono color-fg-muted no-wrap">June 10, 2021</time> </span> </div> </footer> </div> </article> <article class="color-border-muted card"> <div class="d-flex flex-column"> <div class="d-block col-12 position-relative rounded-2 mb-3 overflow-hidden tease-thumbnail" target="_self"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="400" height="212" src="https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?resize=400%2C212" class="d-block cover-image tease-thumbnail__img wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?w=300 300w, https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?w=800 800w, https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?w=400 400w, https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?w=1032 1032w, https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?w=516 516w, https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?zoom=3&resize=400%2C212 1200w" sizes="(max-width: 400px) 100vw, 400px" /> </div> <div class="mb-1"><a href="https://github.blog/security/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Security</a></div> <h3 class="h6-mktg mb-2"> <a class="Link--primary card__link" href="https://github.blog/security/vulnerability-research/how-to-get-root-on-ubuntu-20-04-by-pretending-nobodys-home/" target="_self"> How to get root on Ubuntu 20.04 by pretending nobody’s /home </a> </h3> <div class="f4-mktg color-fg-muted"> <p>Ubuntu 20.04 local privilege escalation using vulnerabilities in gdm3 and accountsservice (CVE-2020-16125, CVE-2020-16126, CVE-2020-16127)</p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <span> <span class="text-bold"> <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2020-11-10" class="text-mono color-fg-muted no-wrap">November 10, 2020</time> </span> </div> </footer> </div> </article> <article class="color-border-muted card"> <div class="d-flex flex-column"> <div class="d-block col-12 position-relative rounded-2 mb-3 overflow-hidden tease-thumbnail" target="_self"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="400" height="212" src="https://github.blog/wp-content/uploads/2024/09/Security-LightMode-3-1.png?resize=400%2C212" class="d-block cover-image tease-thumbnail__img wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2024/09/Security-LightMode-3-1.png?w=300 300w, https://github.blog/wp-content/uploads/2024/09/Security-LightMode-3-1.png?w=800 800w, https://github.blog/wp-content/uploads/2024/09/Security-LightMode-3-1.png?w=400 400w, https://github.blog/wp-content/uploads/2024/09/Security-LightMode-3-1.png?w=1032 1032w, https://github.blog/wp-content/uploads/2024/09/Security-LightMode-3-1.png?w=516 516w, https://github.blog/wp-content/uploads/2024/09/Security-LightMode-3-1.png?zoom=3&resize=400%2C212 1200w" sizes="(max-width: 400px) 100vw, 400px" /> </div> <div class="mb-1"><a href="https://github.blog/security/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Security</a></div> <h3 class="h6-mktg mb-2"> <a class="Link--primary card__link" href="https://github.blog/security/vulnerability-research/ubuntu-whoopsie-integer-overflow-vulnerability-cve-2019-11484/" target="_self"> Ubuntu whoopsie integer overflow vulnerability (CVE-2019-11484) </a> </h3> <div class="f4-mktg color-fg-muted"> <p>This is the fourth and final post in a series about Ubuntu’s crash reporting system. We’ll review CVE-2019-11484, a vulnerability in whoopsie which enables a local attacker to get a shell as the whoopsie user, thereby gaining the ability to read any crash report.</p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <span> <span class="text-bold"> <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2019-12-23" class="text-mono color-fg-muted no-wrap">December 23, 2019</time> </span> </div> </footer> </div> </article> <article class="color-border-muted card"> <div class="d-flex flex-column"> <div class="d-block col-12 position-relative rounded-2 mb-3 overflow-hidden tease-thumbnail" target="_self"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="400" height="212" src="https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?resize=400%2C212" class="d-block cover-image tease-thumbnail__img wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?w=300 300w, https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?w=800 800w, https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?w=400 400w, https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?w=1032 1032w, https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?w=516 516w, https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?zoom=3&resize=400%2C212 1200w" sizes="(max-width: 400px) 100vw, 400px" /> </div> <div class="mb-1"><a href="https://github.blog/security/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Security</a></div> <h3 class="h6-mktg mb-2"> <a class="Link--primary card__link" href="https://github.blog/security/vulnerability-research/ubuntu-apport-pid-recycling-security-vulnerability-cve-2019-15790/" target="_self"> Ubuntu apport PID recycling security vulnerability (CVE-2019-15790) </a> </h3> <div class="f4-mktg color-fg-muted"> <p>This is the third post in a series about Ubuntu’s crash reporting system. We’ll review CVE-2019-15790, a vulnerability in apport that enables a local attacker to obtain the ASLR offsets for any process they can start (or restart).</p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <span> <span class="text-bold"> <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2019-12-19" class="text-mono color-fg-muted no-wrap">December 19, 2019</time> </span> </div> </footer> </div> </article> <article class="color-border-muted card"> <div class="d-flex flex-column"> <div class="d-block col-12 position-relative rounded-2 mb-3 overflow-hidden tease-thumbnail" target="_self"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="400" height="212" src="https://github.blog/wp-content/uploads/2024/09/Security-LightMode-2.png?resize=400%2C212" class="d-block cover-image tease-thumbnail__img wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2024/09/Security-LightMode-2.png?w=300 300w, https://github.blog/wp-content/uploads/2024/09/Security-LightMode-2.png?w=800 800w, https://github.blog/wp-content/uploads/2024/09/Security-LightMode-2.png?w=400 400w, https://github.blog/wp-content/uploads/2024/09/Security-LightMode-2.png?w=1032 1032w, https://github.blog/wp-content/uploads/2024/09/Security-LightMode-2.png?w=516 516w, https://github.blog/wp-content/uploads/2024/09/Security-LightMode-2.png?zoom=3&resize=400%2C212 1200w" sizes="(max-width: 400px) 100vw, 400px" /> </div> <div class="mb-1"><a href="https://github.blog/security/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Security</a></div> <h3 class="h6-mktg mb-2"> <a class="Link--primary card__link" href="https://github.blog/security/vulnerability-research/ubuntu-apport-toctou-security-vulnerability-cve-2019-7307/" target="_self"> Ubuntu apport TOCTOU security vulnerability (CVE-2019-7307) </a> </h3> <div class="f4-mktg color-fg-muted"> <p>This is the second post in our series about Ubuntu’s crash reporting system. We’ll review CVE-2019-7307, a TOCTOU vulnerability that enables a local attacker to include the contents of any file on the system in a crash report.</p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <span> <span class="text-bold"> <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2019-12-17" class="text-mono color-fg-muted no-wrap">December 17, 2019</time> </span> </div> </footer> </div> </article> <article class="color-border-muted card"> <div class="d-flex flex-column"> <div class="d-block col-12 position-relative rounded-2 mb-3 overflow-hidden tease-thumbnail" target="_self"> <svg aria-hidden="true" width="1032" height="548" class="width-full height-auto d-block" role="presentation"></svg> <img width="400" height="212" src="https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?resize=400%2C212" class="d-block cover-image tease-thumbnail__img wp-post-image" alt="" decoding="async" loading="lazy" srcset="https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?w=300 300w, https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?w=800 800w, https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?w=400 400w, https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?w=1032 1032w, https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?w=516 516w, https://github.blog/wp-content/uploads/2024/02/Security-LightMode-1-1.png?zoom=3&resize=400%2C212 1200w" sizes="(max-width: 400px) 100vw, 400px" /> </div> <div class="mb-1"><a href="https://github.blog/security/" class="f5-mktg text-gradient-purple-coral text-bold pb-1 position-relative z-2">Security</a></div> <h3 class="h6-mktg mb-2"> <a class="Link--primary card__link" href="https://github.blog/security/vulnerability-research/whoopsie-daisy-chaining-accidental-features-of-ubuntus-crash-reporter-to-get-local-privilege-escalation/" target="_self"> Whoopsie-daisy: Chaining accidental features of Ubuntu’s crash reporter to get Local Privilege Escalation </a> </h3> <div class="f4-mktg color-fg-muted"> <p>This post summarizes several security vulnerabilities in Ubuntu’s crash reporting system: CVE-2019-7307, CVE-2019-11476, CVE-2019-11481, CVE-2019-11484, CVE-2019-15790. When chained together, they allow an unprivileged user to read arbitrary files on the system.</p> </div> <footer> <div class="d-flex flex-items-center mb-6px"> <span> <span class="text-bold"> <a href="https://github.blog/author/kevinbackhouse/" title="Posts by Kevin Backhouse" class="author url fn Link--primary no-wrap position-relative z-2" rel="author">Kevin Backhouse</a> </span> <span class="mx-1 color-fg-muted">·</span> <time datetime="2019-12-12" class="text-mono color-fg-muted no-wrap">December 12, 2019</time> </span> </div> </footer> </div> </article> </div> </div> </div> <div class="py-6 py-lg-8 color-bg-subtle" data-color-mode="dark" data-light-theme="light" data-dark-theme="dark"> <div class="container-xl p-responsive-blog"> <section id="newsletter" class="newsletter rounded-2"> <div class="color-bg-subtle rounded-2"> <div class="d-flex flex-row flex-wrap gutter-spacious py-5 px-4 py-md-6 px-md-5"> <div class="col-12 col-lg-6 col-xl-7"> <h2 class="h4-mktg color-fg-default"> We do newsletters, too</h2> <p class="f3-mktg color-fg-muted mt-2 mb-3">Discover tips, technical guides, and best practices in our biweekly newsletter just for devs.</p> </div> <div class="col-12 col-lg-6 col-xl-5"> <form method="post" action="https://s88570519.t.eloqua.com/e/f2?elqFormName=copynewsletter-signup-form-637872624660309567&elqSiteID=88570519" class="js-form-validator"> <div class="newsletter-form d-md-flex flex-row mt-0 mb-3 rounded-2 required form-group"> <div class="m-0 width-full"> <label for="newsletter_emailAddress" class="screen-reader-text">Your email address</label> <input type="email" required id="newsletter_emailAddress" name="emailAddress" placeholder="Your email address" class="required js-validity-check d-block width-full height-md-full mb-2 mb-md-0 f4-mktg newsletter-field rounded-2" /> </div> <input type="hidden" name="classification" value="Practitioner"> <button type="submit" class="js-form-validator-submit newsletter-submit flex-shrink-0 arrow-target-mktg d-none d-md-flex flex-row f3-mktg flex-items-center text-semibold rounded-2"> <span>Subscribe</span> <svg xmlns="http://www.w3.org/2000/svg" class="octicon arrow-symbol-mktg" width="24" height="24" viewBox="0 0 16 16" fill="none"><path fill="currentColor" d="M7.28033 3.21967C6.98744 2.92678 6.51256 2.92678 6.21967 3.21967C5.92678 3.51256 5.92678 3.98744 6.21967 4.28033L7.28033 3.21967ZM11 8L11.5303 8.53033C11.8232 8.23744 11.8232 7.76256 11.5303 7.46967L11 8ZM6.21967 11.7197C5.92678 12.0126 5.92678 12.4874 6.21967 12.7803C6.51256 13.0732 6.98744 13.0732 7.28033 12.7803L6.21967 11.7197ZM6.21967 4.28033L10.4697 8.53033L11.5303 7.46967L7.28033 3.21967L6.21967 4.28033ZM10.4697 7.46967L6.21967 11.7197L7.28033 12.7803L11.5303 8.53033L10.4697 7.46967Z"></path><path class="octicon-chevrow-stem" stroke="currentColor" d="M1.75 8H11" stroke-width="1.5" stroke-linecap="round"></path></svg> </button> </div> <div class="form-checkbox color-fg-muted f6-mktg m-0 mt-2 form-group"> <label class="text-normal"> <input id="optincheckbox" name="marketingEmailOptIn1" type="checkbox" value="True"> Yes please, I’d like GitHub and affiliates to use my information for personalized communications, targeted advertising and campaign effectiveness. 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