Ubuntu 24.04 LTS Snapd: USN-6940-1 Critical Security Advisory

Several security issues were fixed in snapd.

Software Description:

- snapd: Daemon and tooling that enable snap packages

Details:

Neil McPhail discovered that snapd did not properly restrict writes to the

$HOME/bin path in the AppArmor profile for snaps using the home plug. An

attacker who could convince a user to install a malicious snap could use this

vulnerability to escape the snap sandbox. (CVE-2024-1724)

Zeyad Gouda discovered that snapd failed to properly check the file type when

extracting a snap. An attacker who could convince a user to install a malicious

snap containing non-regular files could then cause snapd to block indefinitely

while trying to read from such files and cause a denial of

service. (CVE-2024-29068)

Zeyad Gouda discovered that snapd failed to properly check the destination of

symbolic links when extracting a snap. An attacker who could convince a user to

install a malicious snap containing crafted symbolic links could then cause

snapd to write out th...