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Vulnerability DatabaseCVE-2021-25786
CVE-2021-25786:
NixOS vulnerability analysis and mitigation
Overview
An issue was discovered in QPDF version 10.0.4 that allows remote attackers to execute arbitrary code via a crafted .pdf file to Pl_ASCII85Decoder::write parameter in libqpdf (NVD).
Technical details
The vulnerability is a heap-use-after-free issue in the Pl_ASCII85Decoder::write function of QPDF. The bug occurs when processing crafted PDF files, specifically in the ASCII85 decoding functionality. The vulnerability has been assigned a CVSS v3.1 Base Score of 5.3 (Medium) with the vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L (NVD).
Impact
If successfully exploited, this vulnerability could allow attackers to execute arbitrary code on affected systems when processing specially crafted PDF files. The impact affects confidentiality, integrity, and availability of the system, though all at a low level according to the CVSS scoring (NVD).
Mitigation and workarounds
The vulnerability has been fixed in subsequent releases of QPDF. Debian has released security updates to address this issue in various distributions, including version 8.4.0-2+deb10u1 for Debian 10 buster (Debian LTS).
Additional resources
Source: This report was generated using AI
Related NixOS vulnerabilities:
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