netlabel: Out-of-Bounds Memory Access in Linux Kernel
Summary
GSD-2022-1001715: netlabel: fix out-of-bounds memory accesses. Affects Kernel versions >= 446fda4f26822b2d42ab3396aafcedf38a9ff2b6, < 5578de4834fe0f2a34fedc7374be691443396d1f. No fix is published. How to fix ↓
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Background
The Linux Kernel is a widely used open-source monolithic Unix-like computer operating system kernel. It provides essential services to enable communication between hardware and software components of a computer system. The netlabel subsystem in the Linux Kernel is responsible for labeling network packets with security attributes. These labels are used for access control decisions and information flow control. However, a vulnerability has been discovered in the netlabel subsystem that allows for out-of-bounds memory accesses.
Vulnerability Detail
The netlabel vulnerability in the Linux Kernel arises from a flaw in the code that handles netlabel attributes. By manipulating certain attributes, an attacker can trigger out-of-bounds memory accesses, potentially leading to memory corruption, crashes, or even remote code execution. This vulnerability was introduced in version v2.6.19 of the Linux Kernel and has been fixed in version v5.0.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The netlabel vulnerability in the Linux Kernel can lead to out-of-bounds memory accesses, potentially resulting in memory corruption or remote code execution. It is crucial to update the Linux Kernel to version v5.0 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The netlabel vulnerability can potentially allow an attacker to execute arbitrary code or cause denial-of-service by triggering out-of-bounds memory accesses.
You can use the Vulert Playground at Vulert Scanner to check if your system is affected by this vulnerability. Simply upload your package-lock.json file to the playground and it will alert you if the vulnerability is present.
At the time of this report, there are no known public exploits for this vulnerability. However, it is important to apply the fix as soon as possible to mitigate the risk.
Yes, this vulnerability can be exploited remotely if the affected system is exposed to untrusted network traffic.
No, there is no known workaround for this vulnerability. It is recommended to update the Linux Kernel to the fixed version.
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