Use-after-free in Firefox DOM Navigation

Executive Summary

This is a use-after-free vulnerability in Firefox's DOM Navigation component. Use-after-free means a program tries to use memory after it has been freed, which can lead to crashes or arbitrary code execution. It was fixed in Firefox 156 and several Firefox ESR versions.

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Detection Guidance

Detection requires checking Firefox version against patched releases. For Firefox, run: firefox --version. For ESR versions, check: firefox --version | grep ESR. Affected versions are below Firefox 156, Firefox ESR 115.41, Firefox ESR 140.16, or Firefox ESR 153.3.

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Impact Analysis

An attacker could exploit this to crash your browser or run malicious code on your device. This might allow them to steal data, install malware, or take control of your system. Keeping Firefox updated is the best way to avoid this risk.

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Compliance Impact

This vulnerability is a use-after-free in the DOM Navigation component, which could lead to memory corruption and potential arbitrary code execution. Such vulnerabilities may impact compliance with GDPR by risking unauthorized data access or processing, and with HIPAA by potentially exposing protected health information if exploited in a healthcare context.

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Mitigation Strategies

Update Firefox to version 156 or later, Firefox ESR to version 115.41 or later, Firefox ESR to version 140.16 or later, or Firefox ESR to version 153.3 or later to address the use-after-free vulnerability in the DOM Navigation component.

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