Integer Overflow Vulnerability in libXcursor: Memory Allocation Flaw
Summary
CVE-2013-2003: Integer overflow in X.org libXcursor 1.1.13 and earlier allows X servers to trigger allocation of insufficient memory and a buffer overflow via vectors related to the _XcursorFileHeaderCreate function. Affects libxcursor versions < 1:1.1.13-1+deb7u1. Fixed in 1:1.1.13-1+deb7u1. How to fix ↓
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Background
libXcursor is a library used in the X Window System to manage and manipulate cursor images. It provides functionalities for loading and displaying cursor images in various formats. The library is essential for graphical applications running on Unix-like operating systems. However, versions 1.1.13 and earlier are susceptible to an integer overflow vulnerability that can lead to memory allocation issues, potentially affecting the stability and security of applications that rely on it.
Vulnerability Detail
The vulnerability, identified as CVE-2013-2003, arises from an integer overflow in the _XcursorFileHeaderCreate function within libXcursor versions 1.1.13 and earlier. This flaw allows X servers to allocate insufficient memory, resulting in a buffer overflow. Such an overflow can lead to arbitrary code execution, application crashes, or other unintended behaviors, posing significant risks to system integrity and security.
How To Fix
Minimum fixed version
1:1.1.13-1+deb7u1
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 upgrading is not immediately feasible, a temporary workaround is to limit the use of applications that depend on libXcursor until the library can be updated. Additionally, users can monitor their systems for any unusual behavior that may indicate exploitation of this vulnerability.
Conclusion
The integer overflow vulnerability in libXcursor poses significant risks to applications relying on this library. Upgrading to a secure version is crucial to maintaining system integrity and security. Users are encouraged to utilize tools like Vulert for ongoing monitoring of vulnerabilities.
See every vulnerability recorded for libxcursor →
FAQ
CVE-2013-2003 is a vulnerability in the libXcursor library that results from an integer overflow, potentially leading to memory allocation issues and buffer overflows.
You can check if your application is affected by using Vulert, which monitors open-source vulnerabilities in real-time. Visit Vulert Scanner to analyze your manifest file.
The risks include arbitrary code execution, application crashes, and potential unauthorized access to system resources, which can compromise system security.
Yes, you should upgrade to version 1:1.1.13-1+deb7u1 or later to mitigate the vulnerability.
If immediate upgrading is not possible, consider limiting the use of affected applications and monitoring your system for any unusual activity.
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