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Vulnerability DatabaseCVE-2020-10593
CVE-2020-10593:
NixOS vulnerability analysis and mitigation
Overview
Tor before 0.3.5.10, 0.4.x before 0.4.1.9, and 0.4.2.x before 0.4.2.7 contains a vulnerability identified as CVE-2020-10593 (also known as TROVE-2020-004). The vulnerability occurs in the circpad_setup_machine_on_circ function because a circuit-padding machine can be negotiated twice on the same circuit (CVE Details).
Technical details
The vulnerability is a memory leak condition that occurs when circpad_setup_machine_on_circ() is reached with an inconsistent internal configuration. While the function logs a bug warning, it fails to free an object that is replaced, resulting in a memory leak condition (Tor Bug).
Impact
The vulnerability allows remote attackers to cause a Denial of Service condition through a memory leak in the affected Tor versions (Gentoo Security).
Mitigation and workarounds
Users are advised to upgrade to Tor version 0.3.5.10, 0.4.1.9, or 0.4.2.7 or later, depending on their current version branch. No workaround is available for this vulnerability (OpenSUSE Security).
Additional resources
Source: This report was generated using AI
Related NixOS vulnerabilities:
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