Vulnerability in Kernel package: gcc-plugins/stackleak
Summary
GSD-2022-1001484: gcc-plugins/stackleak: Exactly match strings instead of prefixes. Affects Kernel versions < 59a1131272663ebfcb58b80b926c1aad6fd6d75b. No fix is published. How to fix ↓
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Background
The Kernel package is a fundamental component of the Linux operating system. It provides the core functionality and interfaces for interacting with hardware devices, managing processes, and implementing various system services. The gcc-plugins/stackleak vulnerability affects the Kernel package and specifically targets the stackleak plugin used by the GCC compiler. This plugin is responsible for detecting and preventing stack-based memory corruption vulnerabilities. However, the vulnerability arises from an issue in the plugin's string matching mechanism, which fails to exactly match strings and instead relies on prefixes. This flaw could potentially lead to false positives or false negatives in detecting stack-based memory corruption vulnerabilities.
Vulnerability Detail
The gcc-plugins/stackleak vulnerability in the Kernel package arises from the incorrect string matching mechanism used by the stackleak plugin. By relying on prefixes instead of exact string matches, the plugin may produce inaccurate results when detecting stack-based memory corruption vulnerabilities. This could lead to both false positives, where benign code is flagged as vulnerable, and false negatives, where actual vulnerabilities are missed. The impact of this vulnerability depends on the usage of the stackleak plugin and the reliance on its results for vulnerability detection. If the plugin is heavily relied upon, the presence of this vulnerability could result in the introduction of exploitable stack-based memory corruption vulnerabilities.
How To Fix
No fixed version is published for this vulnerability.
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Conclusion
The gcc-plugins/stackleak vulnerability in the Kernel package can introduce inaccuracies in stack-based memory corruption vulnerability detection. To mitigate this issue, it is crucial to update the Linux Kernel package to version v5.16.19 or later, which includes a fix for the vulnerability. Failure to address this vulnerability may result in the introduction of exploitable vulnerabilities. For further support on vulnerability remediation, please contact DevNack.com.
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FAQ
The impact of the gcc-plugins/stackleak vulnerability depends on the usage of the stackleak plugin and the reliance on its results for vulnerability detection. If the plugin is heavily relied upon, the presence of this vulnerability could result in the introduction of exploitable stack-based memory corruption vulnerabilities.
To fix the gcc-plugins/stackleak vulnerability, it is recommended to update the Linux Kernel package to version v5.16.19 or later. This update includes a fix for the vulnerability in commit 59a1131272663ebfcb58b80b926c1aad6fd6d75b.
The stackleak plugin is used by the GCC compiler in the Kernel package to detect and prevent stack-based memory corruption vulnerabilities. It analyzes the code and identifies potential issues related to stack usage, helping to enhance the security of the Kernel.
False positives occur when benign code is incorrectly flagged as vulnerable, leading to unnecessary investigations or mitigations. False negatives, on the other hand, happen when actual vulnerabilities are missed, potentially leaving the system exposed to exploitation.
No specific workaround is mentioned for the gcc-plugins/stackleak vulnerability. It is recommended to apply the provided fix by updating the Linux Kernel package to the recommended version.
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