CVE-2024-29069: snapd will follow archived symlinks when unpacking a filesystem
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.
Affected Software
Remediation
Patch Available
Event History
Frequently Asked Questions
What is the severity of CVE-2024-29069?
CVE-2024-29069 is classified as a medium severity vulnerability due to improper symbolic link checks in snapd.
How do I fix CVE-2024-29069?
To fix CVE-2024-29069, update snapd to version 2.62 or higher.
What versions of snapd are affected by CVE-2024-29069?
CVE-2024-29069 affects all versions of snapd prior to 2.62.
What are the implications of CVE-2024-29069?
The implications of CVE-2024-29069 include potential arbitrary file write vulnerabilities due to improper handling of symbolic links.
Who is the vendor for CVE-2024-29069?
The vendor for CVE-2024-29069 is Canonical, which maintains the snapd application.