Sensitive Information Leak in Linux Kernel - CVE-2013-2234
Summary
DEBIAN-CVE-2013-2234: The (1) key_notify_sa_flush and (2) key_notify_policy_flush functions in net/key/af_key.c in the Linux kernel before 3.10 do not initialize certain structure members, which allows local users to obtain sensitive informat... Affects linux versions < 3.10.1-1. Fixed in 3.10.1-1. How to fix ↓
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Background
The Linux kernel is the core component of the Linux operating system, responsible for managing system resources and facilitating communication between hardware and software. It provides essential functionalities such as process management, memory management, and device drivers. The vulnerability identified as CVE-2013-2234 affects the Linux kernel versions prior to 3.10, specifically in the net/key/af_key.c file, where certain structure members are not properly initialized, leading to potential information leaks.
Vulnerability Detail
CVE-2013-2234 is a vulnerability in the Linux kernel that arises from the improper initialization of structure members in the key_notify_sa_flush and key_notify_policy_flush functions. This flaw allows local users to read sensitive information from the kernel heap memory by intercepting broadcast messages from the notify interface of an IPSec key_socket. The implications of this vulnerability are significant, as it can lead to unauthorized access to sensitive data, potentially compromising system security.
How To Fix
Minimum fixed version
3.10.1-1
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 workaround, users can limit access to the key_socket interface to trusted users only, thereby reducing the risk of unauthorized access to sensitive information. However, this is not a complete fix and should only be considered a temporary measure until the package is updated.
Conclusion
CVE-2013-2234 is a significant vulnerability in the Linux kernel that can lead to sensitive information leaks. It is crucial for users to update their systems to the patched version to mitigate the risk. Employing workarounds can provide temporary relief, but updating is the most effective solution.
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FAQ
CVE-2013-2234 is a vulnerability in the Linux kernel that allows local users to access sensitive information from kernel memory due to improper initialization of certain structure members.
The vulnerability affects Linux kernel versions prior to 3.10.
You can use tools like Vulert to monitor and alert for open-source vulnerabilities in your software. Visit Vulert Scanner to check if your application is affected.
If exploited, this vulnerability can lead to unauthorized access to sensitive data, compromising the security of the system.
If immediate updates are not possible, restrict access to the key_socket interface to trusted users as a temporary workaround.
References
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