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Vulnerability DatabaseCVE-2021-39523
CVE-2021-39523:
NixOS vulnerability analysis and mitigation
Overview
A NULL pointer dereference vulnerability was discovered in libredwg through version 0.10.1.3751. The vulnerability exists in the function checkPOLYLINEhandles() located in decode.c. This security issue was assigned CVE-2021-39523 and was publicly disclosed on September 20, 2021 (NVD, Debian Tracker).
Technical details
The vulnerability is caused by a NULL pointer dereference in the checkPOLYLINEhandles() function within decode.c. When processing certain malformed DWG files, the function fails to properly validate pointer values before dereferencing them. The vulnerability has been assigned a CVSS v3.1 base score of 6.5 (Medium) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H (NVD).
Impact
When successfully exploited, this vulnerability allows an attacker to cause a Denial of Service (DoS) condition by triggering a segmentation fault in the application. This can result in the application crashing when processing specially crafted DWG files (GitHub Issue).
Mitigation and workarounds
Users should upgrade to a version of libredwg newer than v0.10.1.3751 which contains fixes for this vulnerability (NVD).
Additional resources
Source: This report was generated using AI
Related NixOS vulnerabilities:
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