Critical Vulnerability in Linux Package: GTK Handling in iwlwifi Driver
Summary
DEBIAN-CVE-2024-27434: In the Linux kernel, the following vulnerability has been resolved: wifi: iwlwifi: mvm: don't set the MFP flag for the GTK The firmware doesn't need the MFP flag for the GTK, it can even make the firmware crash. Affects linux versions < 6.7.12-1. Fixed in 6.7.12-1. 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. The iwlwifi driver is responsible for enabling wireless connectivity on Intel wireless devices. This package is crucial for users who rely on wireless networking, and any vulnerabilities can significantly impact system security and performance.
Vulnerability Detail
In the Linux kernel, a vulnerability has been identified in the iwlwifi driver related to the handling of the Group Temporal Key (GTK) when the Access Point (AP) is configured with the group cipher TKIP and Management Frame Protection Capable (MFPC). The firmware does not require the MFP flag for the GTK, and setting it can lead to firmware crashes. This vulnerability can be exploited if an attacker manipulates the wireless connection, potentially leading to denial of service or unauthorized access.
How To Fix
Minimum fixed version
6.7.12-1
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. It is recommended to apply the patch as soon as it is available.
Conclusion
The vulnerability in the Linux package's iwlwifi driver poses significant risks to users relying on wireless connectivity. It is essential to update to the patched version to ensure system security and stability. Regular monitoring and vulnerability management practices, such as using tools like Vulert, can help maintain a secure environment.
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FAQ
The vulnerability involves improper handling of the MFP flag for the GTK in the iwlwifi driver, which can lead to firmware crashes.
You can use Vulert, which monitors and alerts for open-source vulnerabilities. Visit Vulert Scanner to check if your application is affected without any signup.
Exploitation of this vulnerability can lead to denial of service or unauthorized access to the system, compromising security.
Yes, a patch is available in version 6.7.12-1 of the Linux package for both Debian 13 and Debian 14.
While there are no specific workarounds, it is crucial to prioritize updating your package to mitigate the risk associated with this vulnerability.
References
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