Buffer Overflow Vulnerability in xorg-server: CVE-2017-13723
Summary
ALPINE-CVE-2017-13723: In X.Org Server (aka xserver and xorg-server) before 1.19.4, a local attacker authenticated to the X server could overflow a global buffer, causing crashes of the X server or potentially other problems by injecting large... Affects xorg-server versions < 1.19.5-r0. Fixed in 1.19.5-r0. How to fix ↓
Check if this vulnerability affects your application
Upload a manifest or SBOM and we'll show whether you're affected, plus every other risky package in the same scan.
No signup required · Results in about 60 seconds
Background
xorg-server is a core component of the X Window System, responsible for managing graphical displays on Unix-like operating systems. It facilitates the communication between the operating system and the graphical hardware, enabling applications to render graphics. The xorg-server package is widely used in various Linux distributions, including Alpine Linux. This package is crucial for providing a graphical user interface, and its stability and security are paramount for user experience.
Vulnerability Detail
The vulnerability identified as CVE-2017-13723 affects xorg-server versions prior to 1.19.4. It allows a local authenticated attacker to exploit a buffer overflow condition by injecting large or malformed XKB related atoms through xkbcomp. This could lead to crashes of the X server or potentially other severe issues, compromising the stability and security of the system. The vulnerability has a CVSS score of 7.8, indicating a high severity level.
How To Fix
Minimum fixed version
1.19.5-r0
This is the first release that contains the fix.
sudo apk add --upgrade xorg-serverTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, you can restrict access to the X server to trusted users only, minimizing the risk of exploitation. This can be done by configuring the access control settings in your X server configuration files.
Conclusion
CVE-2017-13723 is a significant vulnerability in the xorg-server package that can lead to severe consequences if exploited. It is crucial for users to update their systems to the patched version to ensure security and stability. Regular monitoring of open-source vulnerabilities, such as through Vulert, can help maintain a secure software environment.
See every vulnerability recorded for xorg-server →
FAQ
CVE-2017-13723 is a buffer overflow vulnerability in the xorg-server package that allows local authenticated attackers to crash the X server or cause other issues.
You can use the Vulert playground at Vulert Scanner to check if your application is affected by this vulnerability without needing to sign up.
Exploitation of this vulnerability can lead to crashes of the X server, potentially affecting the stability and security of the entire system.
Yes, the patched version of xorg-server is 1.19.5-r0. Updating to this version will resolve the vulnerability.
The CVSS score for CVE-2017-13723 is 7.8, indicating a high severity level.
References
Related vulnerabilities
Recent vulnerabilities recorded for xorg-server.
