CVE-2023-42465

Publication date 22 December 2023

Last updated 24 July 2024

Ubuntu priority

Cvss 3 Severity Score

Sudo before 1.9.15 might allow row hammer attacks (for authentication bypass or privilege escalation) because application logic sometimes is based on not equaling an error value (instead of equaling a success value), and because the values do not resist flips of a single bit.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
sudo	23.10 mantic	Not affected
	23.04 lunar	Not affected
	22.04 LTS jammy	Not affected
	20.04 LTS focal	Not affected
	18.04 LTS bionic	Not affected
	16.04 LTS xenial	Not affected
	14.04 LTS trusty	Not affected

Notes

rodrigo-zaiden

part of the code in the fix commit, in plugins/sudoers/auth/passwd.c, plugins/sudoers/auth/sudo_auth.c and plugins/sudoers/auth/sudo_auth.h is not built with Ubuntu as it is using PAM support. for the other part, the code fixed in plugins/sudoers/lookup.c was added in version 1.9.15. hence not affecting any Ubuntu releases, and for plugins/sudoers/match.c, part was added in 1.8.21, that if considered just by itself, it doesn't worth patching.

Patch details

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

Package	Patch details
sudo	Upstream: 7873f83

Severity score breakdown

Parameter	Value
Base score	7.0 · High
Attack vector	Local
Attack complexity	High
Privileges required	Low
User interaction	None
Scope	Unchanged
Confidentiality	High
Integrity impact	High
Availability impact	High
Vector	CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H