CVE-2022-3715
NixOS vulnerability analysis and mitigation

Overview

A heap-buffer overflow vulnerability (CVE-2022-3715) was discovered in the bash package, specifically in the validparametertransform function. The vulnerability was first reported in August 2022 and officially published on January 5, 2023. This flaw affects bash version 5.1 and was introduced by a specific commit in the bash codebase (Debian Tracker, Ubuntu Security).

Technical details

The vulnerability occurs in the validparametertransform function within the subst.c file. When certain conditions are met, a heap-buffer overflow can occur during parameter transformation operations. The issue has a CVSS 3.1 base score of 7.8 (High), with the following vector: CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H. The vulnerability can be detected using memory analysis tools such as AddressSanitizer or Valgrind (Red Hat Bugzilla).

Impact

The heap-buffer overflow vulnerability can lead to memory corruption issues, potentially allowing an attacker to execute arbitrary code or cause system crashes. The high CVSS score indicates significant potential impact on system confidentiality, integrity, and availability (Ubuntu Security).

Mitigation and workarounds

The vulnerability has been fixed in various distributions, including Ubuntu 22.04 LTS (version 5.1-6ubuntu1.1) and Debian bookworm (version 5.2.15-2). Red Hat has addressed this issue in Red Hat Enterprise Linux 9 through RHSA-2023:0340. A patch was developed that modifies the validparametertransform function to include additional validation checks (Ubuntu Security, Debian Tracker).

Additional resources


SourceThis report was generated using AI

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