Vulnerability in Kernel: ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions
Summary
GSD-2021-1000769: ipv6: Fix KASAN: slab-out-of-bounds Read in fib6_nh_flush_exceptions. Affects Kernel versions >= f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74, < 09870235827451409ff546b073d754a19fd17e2e. No fix is published. How to fix ↓
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Background
The Kernel is a crucial component of the Linux operating system that provides core functionalities and acts as an interface between hardware and software. It manages system resources, facilitates communication between processes, and handles device drivers. The vulnerability in question affects the IPv6 implementation within the Kernel, specifically the 'fib6_nh_flush_exceptions' function.
Vulnerability Detail
The vulnerability, identified as GSD-2021-1000769, is a slab-out-of-bounds read issue in the 'fib6_nh_flush_exceptions' function of the IPv6 implementation. This vulnerability was introduced in version v5.3 of the Linux Kernel and fixed in version v5.10.43. An attacker could potentially exploit this vulnerability to read data beyond the allocated memory, leading to information disclosure or a system crash. However, the actual impact and attack plausibility have not been proven.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
As this vulnerability has been fixed in the latest version of the Linux Kernel, there is no specific workaround available. It is strongly advised to update to the patched version to eliminate the risk of exploitation.
Conclusion
In conclusion, the vulnerability in the Kernel's IPv6 implementation, specifically the 'fib6_nh_flush_exceptions' function, could potentially lead to information disclosure or a system crash. It is crucial to update the Linux Kernel to version v5.10.43 or later to mitigate this vulnerability. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability could potentially lead to information disclosure or a system crash. However, the actual impact and attack plausibility have not been proven.
This vulnerability affects Linux Kernel versions starting from v5.3 up to v5.10.42. The issue was fixed in version v5.10.43.
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, and Vulert will analyze it in real-time to identify any open-source vulnerabilities, including this one.
At the time of this report, there are no known exploits for this vulnerability. However, it is still important to update to the latest version of the Linux Kernel to ensure your system is protected.
You can find more information about this vulnerability, including the fix commit and the source code changes, in the GSD-2021-1000769.json file available at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000769.json.
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