Integer Overflow Vulnerability in Linux Package - CVE-2013-4511
Summary
DEBIAN-CVE-2013-4511: Multiple integer overflows in Alchemy LCD frame-buffer drivers in the Linux kernel before 3.12 allow local users to create a read-write memory mapping for the entirety of kernel memory, and consequently gain privileges,... Affects linux versions < 3.11.8-1. Fixed in 3.11.8-1. How to fix ↓
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Background
The Linux package is a core component of the Debian operating system, providing essential functionalities for managing hardware and system resources. It is widely used in various distributions and is known for its stability and performance. However, certain versions of the Linux kernel are susceptible to integer overflow vulnerabilities, which can lead to severe security risks.
Vulnerability Detail
Multiple integer overflows in Alchemy LCD frame-buffer drivers in the Linux kernel before version 3.12 allow local users to create a read-write memory mapping for the entirety of kernel memory. This can lead to privilege escalation through crafted mmap operations, specifically in the au1100fb_fb_mmap and au1200fb_fb_mmap functions. The vulnerability can be exploited by local users to gain unauthorized access to sensitive kernel memory, potentially compromising the entire system.
How To Fix
Minimum fixed version
3.11.8-1
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, you can restrict access to the affected drivers or limit the permissions of local users to prevent exploitation until the package can be updated.
Conclusion
In summary, CVE-2013-4511 is a critical vulnerability in the Linux kernel that can lead to privilege escalation through integer overflows. It is essential to update to the patched version to protect your system from potential exploitation. Utilizing tools like Vulert can help monitor and manage vulnerabilities effectively.
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FAQ
CVE-2013-4511 is a vulnerability in the Linux kernel that allows local users to exploit integer overflows in specific drivers, leading to potential privilege escalation.
The vulnerability affects versions of the Linux kernel prior to 3.12. It is crucial to update to version 3.11.8-1 or later to mitigate the risk.
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 without requiring any signup.
If exploited, this vulnerability can allow local users to gain unauthorized access to kernel memory, potentially leading to full system compromise and data breaches.
While the best solution is to update the package, you can temporarily restrict access to the affected drivers or limit user permissions as a workaround.
References
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