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CVE-2021-33657

Publication date 1 April 2022

Last updated 24 July 2024

Ubuntu priority

Medium

Why this priority?

Cvss 3 Severity Score

8.8 · High

Score breakdown

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.

Read the notes from the security team

Status

Package Ubuntu Release Status
libsdl1.2 24.10 oracular Not in release
24.04 LTS noble Not in release
23.10 mantic Not in release
23.04 lunar Ignored end of life, was needed
22.10 kinetic Ignored end of life, was needed
22.04 LTS jammy
Vulnerable
21.10 impish Ignored end of life
20.04 LTS focal
Vulnerable
18.04 LTS bionic
Fixed 1.2.15+dfsg2-0.1ubuntu0.2
16.04 LTS xenial
14.04 LTS trusty
libsdl2 24.10 oracular
Not affected
24.04 LTS noble
Not affected
23.10 mantic
Not affected
23.04 lunar
Not affected
22.10 kinetic
Not affected
22.04 LTS jammy
Not affected
21.10 impish
Fixed 2.0.14+dfsg2-3ubuntu0.1
20.04 LTS focal
Vulnerable
18.04 LTS bionic
Vulnerable
16.04 LTS xenial
Vulnerable
14.04 LTS trusty
Vulnerable

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Notes

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.

Patch details

For informational purposes only. We recommend not to cherry-pick updates. How can I get the fixes?

Package Patch details
libsdl2

Severity score breakdown

Parameter Value
Base score 8.8 · High
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

References

Related Ubuntu Security Notices (USN)

    • USN-5398-1
    • Simple DirectMedia Layer vulnerability
    • 28 April 2022

Other references