Denial of Service Vulnerability in Linux Package: CVE-2013-2128
Summary
DEBIAN-CVE-2013-2128: The tcp_read_sock function in net/ipv4/tcp.c in the Linux kernel before 2.6.34 does not properly manage skb consumption, which allows local users to cause a denial of service (system crash) via a crafted splice system ca... Affects linux versions < 2.6.35-1~experimental.1. Fixed in 2.6.35-1~experimental.1. How to fix ↓
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Background
The Linux package is a core component of the Debian operating system, providing essential functionality for managing system resources and enabling communication between hardware and software. This package is widely used across various distributions and versions of Linux, making it critical for system stability and performance. The vulnerability identified as CVE-2013-2128 affects the tcp_read_sock function, which is responsible for managing TCP socket connections. This flaw can lead to significant system disruptions if exploited.
Vulnerability Detail
The vulnerability arises from improper management of skb (socket buffer) consumption in the tcp_read_sock function located in net/ipv4/tcp.c. This flaw exists in Linux kernel versions prior to 2.6.34 and allows local users to exploit the system by executing a crafted splice system call on a TCP socket. The result can be a denial of service, causing the system to crash. This vulnerability poses a risk to system availability and can be exploited by malicious users to disrupt services.
How To Fix
Minimum fixed version
2.6.35-1~experimental.1
This is the first release that contains the fix.
sudo apt-get install --only-upgrade linuxTip — Not sure which version your app runs? Vulert can match this fix to it. Scan free →
Workaround
As a temporary workaround, users can limit access to the affected TCP sockets or implement stricter user permissions to prevent unauthorized access. However, this does not fully mitigate the risk and updating the package is strongly recommended.
Conclusion
CVE-2013-2128 represents a significant vulnerability in the Linux package that can lead to denial of service attacks. Users are advised to update their systems to the patched version to ensure protection against potential exploitation. Regular monitoring and updates are crucial for maintaining system security.
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FAQ
CVE-2013-2128 is a vulnerability in the Linux kernel that can lead to a denial of service due to improper management of socket buffers.
The vulnerability affects Linux kernel versions prior to 2.6.34.
You can use the Vulert platform to monitor and alert for open-source vulnerabilities in your software by checking your manifest file.
Exploitation of this vulnerability can lead to system crashes and service disruptions, impacting system availability.
While limiting access to affected TCP sockets can reduce risk, it is not a complete solution. Updating the package is the best course of action.
References
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