Heap Overflow Vulnerability in libxcursor: Denial of Service Risk
Summary
DEBIAN-CVE-2015-9262: _XcursorThemeInherits in library.c in libXcursor before 1.1.15 allows remote attackers to cause denial of service or potentially code execution via a one-byte heap overflow. Affects libxcursor versions < 1:1.1.15-1. Fixed in 1:1.1.15-1. How to fix ↓
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Background
libxcursor is a library that provides functions for loading and manipulating cursor images in X Window System applications. It is widely used in graphical applications to manage mouse cursor appearances. The library is crucial for ensuring that user interfaces are visually appealing and responsive. However, prior to version 1.1.15, libxcursor contained a vulnerability that could be exploited by remote attackers, leading to potential denial of service or code execution.
Vulnerability Detail
The vulnerability, identified as CVE-2015-9262, exists in the _XcursorThemeInherits function within library.c of libXcursor versions before 1.1.15. It allows remote attackers to exploit a one-byte heap overflow, which can lead to denial of service or potentially allow the execution of arbitrary code. This vulnerability arises from improper handling of memory allocation, making it possible for attackers to manipulate the heap memory.
How To Fix
Minimum fixed version
1:1.1.15-1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade libxcursorTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
If you are unable to update the package immediately, consider disabling any features that rely on libxcursor or restricting access to applications that utilize this library until the update can be applied.
Conclusion
The vulnerability in libxcursor (CVE-2015-9262) poses significant risks, including denial of service and potential code execution. It is crucial for users to update to the patched version 1:1.15-1 or later to safeguard their systems. Regular monitoring for vulnerabilities using tools like Vulert can help maintain software security.
See every vulnerability recorded for libxcursor →
FAQ
CVE-2015-9262 is a vulnerability in libxcursor that allows for a heap overflow, potentially leading to denial of service or code execution.
You can check if your application is affected by using the Vulert playground at Vulert Scanner, which allows you to monitor and alert for open-source vulnerabilities.
Not fixing this vulnerability could expose your system to denial of service attacks or allow attackers to execute arbitrary code, compromising system security.
Yes, you can mitigate the risk by disabling features that rely on libxcursor or restricting access to applications that use this library.
It is recommended to regularly check for vulnerabilities, ideally on a weekly basis, to ensure that your software remains secure and up-to-date.
References
Related vulnerabilities
Recent vulnerabilities recorded for libxcursor.
