Slab-out-of-bounds Vulnerability in Kernel
Summary
UVI-2021-1001308: ipv6: fix another slab-out-of-bounds in fib6_nh_flush_exceptions. Affects Kernel versions >= f88d8ea67fbdbac7a64bfa6ed9a2ba27bb822f74, < 830251361425c5be044db4d826aaf304ea3d14c6. No fix is published. How to fix ↓
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Background
The Kernel is a fundamental component of the Linux operating system that provides core functionalities and interfaces between hardware and software. It manages system resources, including memory, processes, and device drivers. The vulnerability in question affects the Kernel's IPv6 module, specifically the 'fib6_nh_flush_exceptions' function.
Vulnerability Detail
The 'fib6_nh_flush_exceptions' function in the IPv6 module of the Kernel is susceptible to a slab-out-of-bounds vulnerability. This vulnerability was introduced in version v5.3 of the Kernel and fixed in version v5.4.136. An attacker could potentially exploit this vulnerability to execute arbitrary code or cause a denial-of-service (DoS) condition. The exact impact and attack plausibility have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The slab-out-of-bounds vulnerability in the Kernel's IPv6 module can potentially lead to arbitrary code execution or a denial-of-service condition. It is crucial to update the Linux Kernel to version v5.4.136 or later to mitigate this vulnerability. For further support and assistance with vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of this vulnerability could potentially allow an attacker to execute arbitrary code or cause a denial-of-service (DoS) condition.
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 provide real-time alerts for open-source vulnerabilities, including this one.
At the moment, there are no known workarounds for this vulnerability. It is recommended to update the Linux Kernel to the fixed version.
There is no evidence of this vulnerability being exploited in the wild at the time of this report.
For more details about this vulnerability, you can refer to the source information provided by the Cloud Security Alliance's GSD Database at: https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1001xxx/UVI-2021-1001308.json
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