CVE-2021-33657

Published: 1 April 2022

There is a heap overflow problem in video/SDL_pixels.c in SDL (Simple DirectMedia Layer) 2.x to 2.0.18 versions. By crafting a malicious .BMP file, an attacker can cause the application using this library to crash, denial of service or Code execution.

Priority

Medium

CVSS 3 base score: 8.8

Status

Notes

The POC from the SDL issue link only reproduces in versions
2.0.16 and 2.0.18 because of the following commit
https://github.com/libsdl-org/SDL/commit/fed84650
In older versions of libsdl2 and also libsdl1.2, even though
the commit above is not present, I think that there might be a
slight chance to trick the lib with a special crafted input to
cause the heap overflow, and patching will not cause any harm.

References

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2021-33657
• https://github.com/libsdl-org/SDL/commit/8c91cf7dba5193f5ce12d06db1336515851c9ee9 (release-2.0.20)
• https://ubuntu.com/security/notices/USN-5398-1
• NVD
• Launchpad
• Debian

Bugs

• https://github.com/libsdl-org/SDL/issues/5042