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Vulnerability DatabaseCVE-2021-33930
CVE-2021-33930:
NixOS vulnerability analysis and mitigation
Overview
CVE-2021-33930 is a buffer overflow vulnerability discovered in the pool_installable_whatprovides function within src/repo.h of libsolv versions before 0.7.17. This vulnerability was identified and reported on December 13, 2020 (GitHub Issue).
Technical details
The vulnerability exists in the pool_installable_whatprovides function where a heap-buffer overflow can occur when accessing pool->considered->map[id>>3]. The issue arises when the index value 'id>>3' exceeds pool->considered->size, leading to a potential buffer overflow condition. The vulnerability is triggered through the MAPTST macro which performs the operation ((m)->map[(n) >> 3] & (1 << ((n) & 7))) (GitHub Issue).
Impact
When exploited, this vulnerability allows attackers to cause a Denial of Service condition in affected systems (CVE Mitre).
Mitigation and workarounds
The vulnerability has been addressed in libsolv version 0.7.17 and later. Users are advised to upgrade to the fixed version. Red Hat has released security updates to address this vulnerability in affected products (Red Hat Advisory).
Additional resources
Source: This report was generated using AI
Related NixOS vulnerabilities:
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