Cloud Vulnerability DB
An open project to list all known cloud vulnerabilities and Cloud Service Provider security issues
Vulnerability DatabaseCVE-2021-46179
CVE-2021-46179:
NixOS vulnerability analysis and mitigation
Overview
Reachable Assertion vulnerability in UPX (Ultimate Packer for eXecutables) before version 4.0.0 allows attackers to cause a denial of service via a crafted file passed to the readx function (NVD, Debian Tracker).
Technical details
The vulnerability is classified with a CVSS v3.1 Base Score of 6.5 MEDIUM (Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H). The issue occurs in the readx function in file.cpp, line 275, where an assertion check '(unsigned)len <= buf->getSize()' fails when processing specially crafted input files (GitHub Issue).
Impact
When exploited, this vulnerability can lead to a denial of service condition through program termination when processing maliciously crafted files. The impact is limited to availability, with no direct effects on confidentiality or integrity (NVD).
Mitigation and workarounds
The vulnerability has been fixed in UPX version 4.0.0. Users are advised to upgrade to this version or later to mitigate the issue (NVD).
Additional resources
Source: This report was generated using AI
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