Vulnerability in Kernel Package: bpf: Fix masking negation logic upon negative dst register
Summary
GSD-2021-1000127: bpf: Fix masking negation logic upon negative dst register. Affects Kernel versions >= 979d63d50c0c0f7bc537bf821e056cc9fe5abd38, < 6eba92a4d4be8feb4dc33976abac544fa99d6ecc. No fix is published. How to fix ↓
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Background
The Kernel package is a critical component of the Linux operating system. It provides the core functionality and acts as a bridge between the hardware and software layers. The bpf (Berkeley Packet Filter) subsystem within the Kernel allows for efficient packet filtering and processing. It is widely used for network-related tasks and security mechanisms. However, a vulnerability has been discovered in the bpf subsystem that affects the masking negation logic when dealing with negative destination (dst) registers.
Vulnerability Detail
The vulnerability arises from a flaw in the masking negation logic of the bpf subsystem when negative dst registers are involved. This flaw can potentially lead to unexpected behavior and security issues. An attacker may be able to exploit this vulnerability to bypass security measures, execute arbitrary code, or cause a denial-of-service condition. The impact and attack plausibility of this vulnerability have not been proven yet.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No specific workaround has been provided for this vulnerability.
Conclusion
In conclusion, a vulnerability has been identified in the Kernel package's bpf subsystem, specifically related to the masking negation logic upon negative dst registers. It is crucial to update the Linux Kernel package to version v5.11.19 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 is not yet proven, but it has the potential to allow attackers to bypass security measures, 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. Simply upload your package-lock.json file to the playground, and it will provide real-time monitoring and alerts for open-source vulnerabilities, including this one.
At the time of this report, there is no known exploit for this vulnerability. However, it is important to apply the recommended fix to mitigate any potential risks.
The recommended mitigation is to update the Linux Kernel package to version v5.11.19 or later. This will address the vulnerability and ensure the correct handling of masking negation logic.
The vulnerability was discovered by an automated ID system designed to aid in the discovery of potential security vulnerabilities. The actual impact and attack plausibility have not yet been proven.
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