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Vulnerability DatabaseCVE-2021-39593
CVE-2021-39593:
NixOS vulnerability analysis and mitigation
Overview
A NULL pointer dereference vulnerability was discovered in swftools through 20200710. The vulnerability exists in the swf_FontExtract_DefineFontInfo() function located in swftext.c, which allows attackers to cause a Denial of Service condition (NVD, CISA).
Technical details
The vulnerability has been assigned a CVSS v3.1 base score of 5.5 (Medium) with the vector string CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H. The issue occurs in the swf_FontExtract_DefineFontInfo function at line 225 of swftext.c, where a null pointer dereference can lead to a segmentation fault (Github Issue).
Impact
When 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, making it unavailable to legitimate users (NVD).
Additional resources
Source: This report was generated using AI
Related NixOS vulnerabilities:
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