Critical Buffer Overflow Vulnerability in Linux Kernel (CVE-2012-6712)
Summary
CVE-2012-6712: In the Linux kernel before 3.4, a buffer overflow occurs in drivers/net/wireless/iwlwifi/iwl-agn-sta.c, which will cause at least memory corruption. Affects linux versions < 3.8.11-1. Fixed in 3.8.11-1. How to fix ↓
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Background
The Linux kernel is the core component of the Linux operating system, responsible for managing hardware resources and providing essential services to applications. It is widely used across various devices, from servers to embedded systems. The kernel's wireless networking drivers, particularly the iwlwifi driver, are crucial for enabling wireless communication. This vulnerability affects versions of the Linux kernel prior to 3.4, specifically in the iwl-agn-sta.c file, which can lead to severe security risks.
Vulnerability Detail
CVE-2012-6712 is a buffer overflow vulnerability found in the iwlwifi driver of the Linux kernel. This flaw allows an attacker to exploit memory corruption, potentially leading to unauthorized access, system crashes, or arbitrary code execution. The vulnerability arises from improper handling of input data, which can overflow the allocated buffer, causing unpredictable behavior in the system. The CVSS score for this vulnerability is 9.8, indicating a critical severity level.
How To Fix
Minimum fixed version
3.8.11-1
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
If an immediate update is not feasible, consider disabling the iwlwifi driver temporarily until the system can be updated. This can be done by running the following command:
sudo modprobe -r iwlwifi
Conclusion
CVE-2012-6712 represents a critical buffer overflow vulnerability in the Linux kernel's iwlwifi driver, which can lead to severe security implications. It is essential to update the kernel to the fixed version to safeguard against potential exploits. Users should also consider using tools like Vulert to monitor and manage vulnerabilities in their software.
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FAQ
CVE-2012-6712 is a buffer overflow vulnerability in the Linux kernel's iwlwifi driver that can lead to memory corruption and potential system compromise.
You can use the Vulert platform to check if your application is affected by this vulnerability. Simply upload your manifest file or use the Vulert playground without signup.
Exploitation of this vulnerability can lead to unauthorized access, system crashes, or arbitrary code execution, posing significant security risks.
Yes, the vulnerability is fixed in Linux kernel version 3.8.11-1 and later. It is recommended to update your kernel to this version or higher.
As a temporary measure, you can disable the iwlwifi driver to mitigate the risk until you can perform the necessary updates.
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