Buffer Overflow in libx11 - Security Update
Summary
DSA-3224-1: libx11 - security update. Affects libx11 versions < 2:1.5.0-1+deb7u2. Fixed in 2:1.5.0-1+deb7u2. How to fix ↓
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Background
libx11 is a library that provides an interface to the X Window System protocol. It is used by various X Window System applications to communicate with the X server. The library allows applications to create windows, handle input events, and perform other graphical operations. However, a buffer overflow vulnerability has been discovered in the MakeBigReq macro provided by libx11. This vulnerability could potentially lead to denial of service or the execution of arbitrary code.
Vulnerability Detail
The buffer overflow vulnerability in libx11's MakeBigReq macro allows an attacker to overwrite adjacent memory locations, potentially leading to a crash or the execution of malicious code. By exploiting this vulnerability, an attacker could gain unauthorized access to the system, escalate privileges, or cause the affected application to behave unexpectedly. The vulnerability is identified as CVE-2013-7439.
How To Fix
Minimum fixed version
2:1.5.0-1+deb7u2
This is the first release that contains the fix.
sudo apt-get install --only-upgrade libx11Tip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
There is no known workaround for this vulnerability. It is essential to upgrade the libx11 package to the fixed version.
Conclusion
The buffer overflow vulnerability in libx11's MakeBigReq macro poses a significant security risk. It is crucial to upgrade the libx11 package to the fixed version to mitigate the vulnerability. For further support on vulnerability remediation, you can contact DevNack.com.
See every vulnerability recorded for libx11 →
FAQ
libx11 is a library that provides an interface to the X Window System protocol, allowing applications to communicate with the X server.
A buffer overflow occurs when a program writes data beyond the boundaries of a buffer, potentially overwriting adjacent memory locations.
This vulnerability could lead to denial of service, unauthorized access, privilege escalation, or the execution of arbitrary code.
You can use Vulert's playground at Vulert Scanner to check if your application is affected by this vulnerability. Simply upload your manifest file (e.g., package-lock.json) to the playground, and it will alert you in real-time if your software is vulnerable.
You can refer to the Debian Security Tracker at https://security-tracker.debian.org/tracker/CVE-2013-7439 for detailed information on the status of recompiled packages.
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