Sensitive Information Exposure in Linux Kernel - CVE-2012-6548
Summary
DEBIAN-CVE-2012-6548: The udf_encode_fh function in fs/udf/namei.c in the Linux kernel before 3.6 does not initialize a certain structure member, which allows local users to obtain sensitive information from kernel heap memory via a crafted a... Affects linux versions < 3.2.41-1. Fixed in 3.2.41-1. How to fix ↓
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Background
The Linux kernel is the core component of many operating systems, including Debian. It manages system resources and hardware communication, providing essential services for software applications. The kernel is crucial for system stability and security. This vulnerability affects various versions of the Linux package in Debian, specifically versions prior to 3.6, which may expose sensitive information from kernel memory.
Vulnerability Detail
The udf_encode_fh function in fs/udf/namei.c in the Linux kernel before version 3.6 does not properly initialize a specific structure member. This oversight allows local users to exploit the vulnerability and potentially access sensitive information stored in kernel heap memory through a specially crafted application. The implications of this vulnerability could lead to unauthorized data access, posing a significant security risk.
How To Fix
Minimum fixed version
3.2.41-1
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
Currently, there are no specific workarounds mentioned for this vulnerability. The best course of action is to update to the patched version of the Linux kernel.
Conclusion
CVE-2012-6548 is a significant vulnerability in the Linux kernel that can lead to sensitive information exposure. It is crucial for users to update their systems to the patched version to mitigate risks. Regular monitoring for vulnerabilities using tools like Vulert can help maintain system security.
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FAQ
CVE-2012-6548 is a vulnerability in the Linux kernel that allows local users to access sensitive information from kernel memory due to improper initialization of a structure member.
The vulnerability affects Linux kernel versions prior to 3.6.
You can check your system's kernel version using the command 'uname -r'. If it is below 3.6, your system is vulnerable.
The risks include unauthorized access to sensitive information stored in kernel memory, which could lead to further exploitation or data breaches.
You can use Vulert, which monitors and alerts in real-time for open-source vulnerabilities by analyzing your manifest file, such as package-lock.json. You can check for vulnerabilities without installation using the Vulert playground.
References
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