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Vulnerability DatabaseCVE-2023-40857

CVE-2023-40857: 
NixOS vulnerability analysis and mitigation

Overview

A Buffer Overflow vulnerability was discovered in VirusTotal YARA version 4.3.2, identified as CVE-2023-40857. The vulnerability allows remote attackers to execute arbitrary code through the yr_execute_cod function in the exe.c component. The issue was disclosed on August 10, 2023 (GitHub Issue).

Technical details

The vulnerability is classified as a heap-buffer-overflow that occurs in the yr_execute_code function located in libyara/exec.c at line 1426. The issue manifests as a READ operation of size 8 at an unauthorized memory location. The vulnerability received a CVSS v3.1 Base Score of 8.8 (HIGH) with the vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H (NVD).

Impact

The vulnerability could potentially allow attackers to execute arbitrary code on affected systems. This could lead to complete system compromise, including unauthorized access to sensitive data, system modifications, and potential service disruptions (NVD).

Mitigation and workarounds

According to Debian Security Tracker, this is considered a non-issue as untrusted YARA rules are not supported. This was clarified in the follow-up discussion at https://github.com/VirusTotal/yara/issues/1948 (Debian Tracker).

Additional resources

Source: This report was generated using AI

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