Data-race vulnerability in af_unix package
Summary
GSD-2022-1003705: af_unix: Fix a data-race in unix_dgram_peer_wake_me(). Affects Kernel versions >= 7d267278a9ece963d77eefec61630223fce08c6c, < 556720013c36c193d9cbfb06e7b33e51f0c39fbf. No fix is published. How to fix ↓
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Background
The af_unix package is a part of the Linux Kernel ecosystem and is responsible for handling Unix domain sockets. Unix domain sockets allow communication between processes on the same host using file system APIs instead of network protocols. These sockets are widely used for inter-process communication in Linux systems.
Vulnerability Detail
The vulnerability, identified as GSD-2022-1003705, exists in the af_unix package and specifically in the unix_dgram_peer_wake_me() function. This vulnerability is a data-race issue that can lead to unpredictable behavior and potential security risks. The data-race occurs when multiple threads access shared data concurrently without proper synchronization. Attackers may exploit this vulnerability to manipulate the shared data and potentially execute arbitrary code or cause a denial-of-service condition.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As a workaround, developers can consider implementing proper synchronization mechanisms, such as locks or atomic operations, when accessing shared data in the affected function. However, applying the official fix by updating the Kernel is the recommended approach.
Conclusion
The data-race vulnerability in the af_unix package can lead to unpredictable behavior and potential security risks. It is crucial to update the Linux Kernel to version v5.4.198 or later to mitigate this vulnerability. Developers can also consider implementing proper synchronization mechanisms as a temporary workaround. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
This vulnerability can lead to unpredictable behavior and potential security risks. Attackers may exploit the data-race issue to manipulate shared data and potentially execute arbitrary code or cause a denial-of-service condition.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Vulert monitors and alerts in real-time for open-source vulnerabilities, using just a manifest file like package-lock.json.
At the time of this report, there is no known exploit for this vulnerability. However, it is crucial to apply the fix or update the Kernel to mitigate the risk.
Developers can consider implementing proper synchronization mechanisms, such as locks or atomic operations, when accessing shared data in the affected function. However, applying the official fix by updating the Kernel is the recommended approach.
To exploit this vulnerability, an attacker would need the ability to execute arbitrary code or manipulate shared data in the affected function. The impact may vary depending on the system's configuration and the attacker's privileges.
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