Critical Vulnerabilities in libxrender: Denial of Service and Arbitrary Code Execution Risks
Summary
USN-5436-1: libxrender vulnerabilities. Affects libxrender versions < 1:0.9.9-0ubuntu1+esm1. Fixed in 1:0.9.9-0ubuntu1+esm1. How to fix ↓
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Background
libxrender is a library that provides an interface for rendering X11 graphics. It is widely used in various applications that require graphical rendering capabilities. The library is essential for applications that rely on the X Window System, making it a critical component in many Linux distributions, including Ubuntu. However, vulnerabilities in libxrender can lead to severe security risks, including denial of service and potential arbitrary code execution.
Vulnerability Detail
Tobias Stoeckmann discovered that libXrender incorrectly handled certain responses, which could allow an attacker to exploit this flaw. The vulnerabilities, identified as CVE-2016-7949 and CVE-2016-7950, could lead to a denial of service, where the application becomes unresponsive, or worse, allow an attacker to execute arbitrary code on the affected system. This poses a significant risk to users and systems relying on this library for graphical rendering.
How To Fix
Minimum fixed version
1:0.9.9-0ubuntu1+esm1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade libxrenderTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If immediate updating is not possible, users can mitigate the risk by restricting access to applications that utilize libxrender or by running them in a controlled environment where potential attacks can be monitored.
Conclusion
The vulnerabilities in libxrender present significant risks that can lead to denial of service and arbitrary code execution. It is crucial for users to update to the latest patched version to safeguard their systems. Utilizing tools like Vulert can help monitor and identify vulnerabilities in real-time, ensuring better security for open-source applications.
See every vulnerability recorded for libxrender →
FAQ
libxrender is a library used for rendering graphics in the X Window System, essential for many graphical applications on Linux.
The vulnerabilities can lead to denial of service attacks or allow attackers to execute arbitrary code, compromising system security.
You can use Vulert, which monitors and alerts for open-source vulnerabilities in your software. Visit Vulert Scanner to check your application without any signup.
Consider restricting access to applications that use libxrender or running them in a controlled environment to mitigate risks.
Detailed information can be found in the Ubuntu Security Notices and related CVE entries, such as CVE-2016-7949 and CVE-2016-7950.
References
Related vulnerabilities
Recent vulnerabilities recorded for libxrender.
