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Vulnerability DatabaseCVE-2021-39533

CVE-2021-39533: 
Homebrew vulnerability analysis and mitigation

Overview

An issue was discovered in libslax through v0.22.1 where slaxLexer() in slaxlexer.c contains a heap-based buffer overflow vulnerability (NVD, CVE).

Technical details

The vulnerability exists in the slaxLexer() function within slaxlexer.c at line 986, where a heap-buffer-overflow occurs during input processing. The issue was identified using AddressSanitizer, which detected a READ operation of size 1 at an invalid memory address located 0 bytes to the right of an 8192-byte allocated region (GitHub Issue). The vulnerability has been assigned a CVSS v3.1 base score of 8.8 HIGH with vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H (NVD).

Impact

The heap-based buffer overflow vulnerability could potentially lead to arbitrary code execution, system crashes, or information disclosure. The high CVSS score indicates severe potential impacts on the confidentiality, integrity, and availability of affected systems (NVD).

Mitigation and workarounds

Users should upgrade to a version newer than v0.22.1 of libslax once available. The vulnerability was reported and documented in the official issue tracker, indicating awareness by the maintainers (GitHub Issue).

Additional resources

Source: This report was generated using AI

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