CVE-2024-29069

Publication date 14 March 2024

Last updated 6 August 2024

Ubuntu priority

Cvss 3 Severity Score

In snapd versions prior to 2.62, snapd failed to properly check the destination of symbolic links when extracting a snap. The snap format is a squashfs file-system image and so can contain symbolic links and other file types. Various file entries within the snap squashfs image (such as icons and desktop files etc) are directly read by snapd when it is extracted. An attacker who could convince a user to install a malicious snap which contained symbolic links at these paths could then cause snapd to write out the contents of the symbolic link destination into a world-readable directory. This in-turn could allow an unprivileged user to gain access to privileged information.

Read the notes from the security team

Status

Show unmaintained releases

Package	Ubuntu Release	Status
snapd	24.10 oracular	Fixed 2.63+24.10
	24.04 LTS noble	Fixed 2.62+24.04build1
	23.10 mantic	Ignored end of life, was needed
	22.04 LTS jammy	Fixed 2.63+22.04ubuntu0.1
	20.04 LTS focal	Fixed 2.63+20.04ubuntu0.1
	18.04 LTS bionic	Vulnerable
	16.04 LTS xenial	Vulnerable
	14.04 LTS trusty	Ignored end of standard support

Notes

sarnold

CWE-610 CAPEC-132

Patch details

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

Package	Patch details
snapd	Upstream: b66fee8

Severity score breakdown

Parameter	Value
Base score	4.8 · Medium
Attack vector	Local
Attack complexity	Low
Privileges required	Low
User interaction	Required
Scope	Unchanged
Confidentiality	Low
Integrity impact	Low
Availability impact	Low
Vector	CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:L

References

Related Ubuntu Security Notices (USN)

USN-6940-1
snapd vulnerabilities
1 August 2024