Critical Vulnerability in xorg-server: Potential Remote Code Execution Risk
Summary
ALPINE-CVE-2017-12180: xorg-x11-server before 1.19.5 was missing length validation in XFree86 VidModeExtension allowing malicious X client to cause X server to crash or possibly execute arbitrary code. Affects xorg-server versions < 1.19.5-r0. Fixed in 1.19.5-r0. How to fix ↓
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Background
xorg-server is a crucial component of the X Window System, responsible for managing graphical displays on Unix-like operating systems. It provides the necessary infrastructure for graphical user interfaces and supports various input devices. The package is widely used in desktop environments and is essential for rendering graphical applications. However, it has been found to have a significant vulnerability that could allow attackers to exploit the system.
Vulnerability Detail
The vulnerability, identified as CVE-2017-12180, originates from a lack of length validation in the XFree86 VidModeExtension of xorg-x11-server versions prior to 1.19.5. This oversight allows a malicious X client to send specially crafted requests to the X server, potentially leading to a crash or arbitrary code execution. The severity of this vulnerability is underscored by its CVSS score of 9.8, indicating a critical risk level that could compromise system integrity and confidentiality.
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, consider restricting access to the X server to trusted clients only. This can be achieved by configuring the X server to use access control mechanisms such as 'xhost' or by modifying the server's configuration files to limit connections.
Conclusion
The xorg-server package has a critical vulnerability (CVE-2017-12180) that poses significant risks, including potential remote code execution. It is crucial to update to the patched version 1.19.5-r0 to secure your system. Utilizing tools like Vulert can help monitor and identify vulnerabilities in your applications effectively.
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FAQ
CVE-2017-12180 is a critical vulnerability in the xorg-server package that allows remote code execution due to improper length validation.
You can use the Vulert platform to check if your application is affected by this vulnerability without needing to install any software.
Exploitation of this vulnerability could lead to system crashes or unauthorized execution of arbitrary code, compromising system security.
Yes, the patched version of xorg-server is 1.19.5-r0. Updating to this version will resolve the vulnerability.
Vulert monitors and alerts for open-source vulnerabilities in your software using just a manifest file. You can check for vulnerabilities in your application using their playground.
References
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