Vulnerability in iwlwifi Kernel Module: Unchecked Pointer Usage in debugfs_dir
Summary
GSD-2022-1000713: iwlwifi: mvm: check debugfs_dir ptr before use. Affects Kernel versions >= 8c082a99edb997d7999eb7cdb648e47a2bf4a638, < fe51975ff13831e794e1bcd0039b305dcad3d7ba. No fix is published. How to fix ↓
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Background
The iwlwifi kernel module is responsible for managing wireless network interfaces that use Intel Wireless WiFi Link adapters. It provides functionality for connecting to wireless networks, managing network settings, and handling data transmission. The module is an integral part of the Linux Kernel and is widely used in various Linux distributions. However, a vulnerability has been discovered in the iwlwifi module that could potentially be exploited by attackers.
Vulnerability Detail
The vulnerability in the iwlwifi module involves the improper handling of a debugfs_dir pointer. The debugfs_dir pointer is not properly checked before being used, which can lead to a NULL pointer dereference. An attacker could exploit this vulnerability by sending specially crafted network packets to a vulnerable system, causing a kernel panic or potentially executing arbitrary code with kernel privileges. The impact of this vulnerability could range from denial of service to full system compromise.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
There is no known workaround for this vulnerability. It is essential to apply the fix by updating the Linux Kernel to a patched version.
Conclusion
The vulnerability in the iwlwifi kernel module poses a significant risk to systems using Intel Wireless WiFi Link adapters. It is crucial to update the Linux Kernel to a patched version to mitigate the vulnerability. For further support and assistance in vulnerability remediation, please contact DevNack.com.
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FAQ
The iwlwifi module is a kernel module responsible for managing wireless network interfaces that use Intel Wireless WiFi Link adapters. It provides functionality for connecting to wireless networks, managing network settings, and handling data transmission.
The impact of this vulnerability can range from denial of service to full system compromise. An attacker could exploit the vulnerability to cause a kernel panic or execute arbitrary code with kernel privileges.
To fix this vulnerability, it is recommended to update the Linux Kernel to version v5.16.13 or later. This fix addresses the issue by implementing proper checks for the debugfs_dir pointer before using it.
There is no known workaround for this vulnerability. It is essential to apply the fix by updating the Linux Kernel to a patched version.
For more information about this vulnerability, you can refer to the vulnerability database entry at the following link: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2022/1000xxx/GSD-2022-1000713.json
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