Vulnerability in Kernel Package: bpf: Fix masking negation logic upon negative dst register
Summary
GSD-2021-1000184: bpf: Fix masking negation logic upon negative dst register. Affects Kernel versions >= 979d63d50c0c0f7bc537bf821e056cc9fe5abd38, < 53e0db429b37a32b8fc706d0d90eb4583ad13848. No fix is published. How to fix ↓
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Background
The Kernel package is a critical component of the Linux operating system that provides core functionality and interfaces with hardware devices. It is responsible for managing system resources, including memory, processes, and input/output operations. The bpf (Berkeley Packet Filter) subsystem within the Kernel allows for efficient packet filtering and processing. This vulnerability specifically affects the masking negation logic when a negative destination (dst) register is encountered.
Vulnerability Detail
The vulnerability arises from an issue in the bpf subsystem's handling of negative dst registers. When a negative dst register is encountered, the masking negation logic is not properly applied, leading to potential security vulnerabilities. The impact and attack plausibility of this vulnerability have not been proven yet. However, if exploited, an attacker could potentially bypass certain security mechanisms or execute arbitrary code within the Kernel context. This vulnerability was introduced in version v5.0 of the Linux Kernel and has been fixed in version v5.4.117.
How To Fix
No fixed version is published for this vulnerability.
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Workaround
No workaround has been provided for this vulnerability.
Conclusion
In conclusion, the Kernel package in Linux is vulnerable to a masking negation logic issue in the bpf subsystem when encountering negative dst registers. This vulnerability could potentially be exploited to bypass security mechanisms or execute arbitrary code within the Kernel context. It is crucial to update the Linux Kernel package to version v5.4.117 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 if exploited, it could potentially allow an attacker to bypass security mechanisms or execute arbitrary code within the Kernel context.
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.
No workaround has been provided for this vulnerability. It is recommended to update to the fixed version of the Linux Kernel package.
This vulnerability affects versions v5.0 to v5.4.116 of the Linux Kernel.
You can find more information about this vulnerability in the GSD-2021-1000184 entry of the GSD Database at https://github.com/cloudsecurityalliance/gsd-database/blob/main/2021/1000xxx/GSD-2021-1000184.json
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