Cloud Vulnerability DB
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Vulnerability DatabaseCVE-2023-33551
CVE-2023-33551:
NixOS vulnerability analysis and mitigation
Overview
A heap buffer overflow vulnerability (CVE-2023-33551) was discovered in erofs-utils version 1.6. The vulnerability exists in the erofsfsckdirentiter function in fsck/main.c, which allows remote attackers to execute arbitrary code via a crafted erofs filesystem image (GitHub Issue, NVD).
Technical details
The vulnerability occurs when the directory path is too deep and the path name concatenation exceeds the allocated buffer size of PATHMAX (4096 bytes). The issue arises in the erofsfsckdirentiter function where strncpy attempts to concatenate the path string without proper bounds checking, leading to a heap-based buffer overflow ([GitHub Issue](https://github.com/lometsj/blogrepo/issues/2)). The vulnerability has been assigned a CVSS v3.1 base score of 7.8 (HIGH) with vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H (NVD).
Impact
A successful exploitation of this vulnerability could allow remote attackers to execute arbitrary code through a specially crafted erofs filesystem image. The high CVSS score indicates potential severe impacts on system confidentiality, integrity, and availability (NVD).
Mitigation and workarounds
The vulnerability has been patched in updated versions of erofs-utils. Fedora has released security updates (version 1.6-3) for both Fedora 38 and 39 that include fixes for this vulnerability (Fedora Update 38, Fedora Update 39).
Additional resources
Source: This report was generated using AI
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