CVE-2021-46822

Publication date 18 June 2022

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

The PPM reader in libjpeg-turbo through 2.0.90 mishandles use of tjLoadImage for loading a 16-bit binary PPM file into a grayscale buffer and loading a 16-bit binary PGM file into an RGB buffer. This is related to a heap-based buffer overflow in the get_word_rgb_row function in rdppm.c.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
libjpeg-turbo	22.10 kinetic	Not affected
	22.04 LTS jammy	Not affected
	21.10 impish	Ignored end of life
	20.04 LTS focal	Fixed 2.0.3-0ubuntu1.20.04.3
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

mdeslaur

per the upstream fix, no known applications attempt to load a 16-bit PPM file into a grayscale uncompressed image buffer, which is the vulnerability described in this CVE. As such, downgrading priority to low as this vulnerability isn't exposed.

ccdm94

As per the description in commit f35fd27ec64, this only affects versions of libjpeg-turbo which have the tjLoadImage function implemented. This function was introduced by commit aa7459050. The code related to this commit is not present in bionic and earlier, meaning that these releases are not vulnerable (this affects libjpeg-turbo > 1.5.3).

Patch details

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

Package	Patch details
libjpeg-turbo	Upstream: f35fd27

Severity score breakdown

Parameter	Value
Base score	5.5 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	None
User interaction	Required
Scope	Unchanged
Confidentiality	None
Integrity impact	None
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

Related Ubuntu Security Notices (USN)

USN-5631-1
libjpeg-turbo vulnerabilities
22 September 2022