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Vulnerability DatabaseCVE-2021-32494
CVE-2021-32494:
NixOS vulnerability analysis and mitigation
Overview
CVE-2021-32494 is a division by zero vulnerability discovered in Radare2's Mach-O parser, specifically in the rebase_buffer function. The vulnerability affects Radare2 version 5.3.0 and was disclosed on July 7, 2023 (NVD).
Technical details
The vulnerability exists in the rebasebuffer function of the Mach-O parser where a pagesize variable can be zero, leading to a division by zero error. The issue has a CVSS v3.1 Base Score of 7.5 HIGH with vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H. The vulnerability is classified as CWE-369 (Divide By Zero) (NVD).
Impact
When exploited, this vulnerability can cause a denial of service condition through a floating-point exception, effectively crashing the application when processing maliciously crafted Mach-O files (GitHub Issue).
Mitigation and workarounds
A fix was implemented by adding a check for page_size < 1 and setting a default value of 4096 in such cases (GitHub Patch).
Additional resources
Source: This report was generated using AI
Related NixOS vulnerabilities:
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