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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.

Notes

AuthorNote
rodrigo-zaiden
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.

Priority

Medium

Cvss 3 Severity Score

8.8

Score breakdown

Status

Package Release Status
libsdl1.2
Launchpad, Ubuntu, Debian
jammy Needed

lunar Needed

upstream Needs triage

focal Needed

bionic
Released (1.2.15+dfsg2-0.1ubuntu0.2)
trusty
Released (1.2.15-8ubuntu1.1+esm2)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
xenial
Released (1.2.15+dfsg1-3ubuntu0.1+esm1)
Available with Ubuntu Pro or Ubuntu Pro (Infra-only)
impish Ignored
(end of life)
kinetic Ignored
(end of life, was needed)
libsdl2
Launchpad, Ubuntu, Debian
jammy Not vulnerable
(2.0.20+dfsg-2)
kinetic Not vulnerable
(2.0.20+dfsg-2)
lunar Not vulnerable
(2.0.20+dfsg-2)
bionic Needed

focal Needed

xenial Needed

trusty Needed

impish
Released (2.0.14+dfsg2-3ubuntu0.1)
upstream
Released (2.0.20)
Patches:
upstream: https://github.com/libsdl-org/SDL/commit/8c91cf7dba5193f5ce12d06db1336515851c9ee9

Severity score breakdown

Parameter Value
Base score 8.8
Attack vector Network
Attack complexity Low
Privileges required None
User interaction Required
Scope Unchanged
Confidentiality High
Integrity impact High
Availability impact High
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H