USN-5753-1: snapd vulnerability

Releases

• Ubuntu 22.10
• Ubuntu 22.04 LTS
• Ubuntu 20.04 LTS
• Ubuntu 18.04 ESM
• Ubuntu 16.04 ESM

Packages

• snapd - Daemon and tooling that enable snap packages

Details

The Qualys Research Team discovered that a race condition existed in the
snapd snap-confine binary when preparing the private /tmp mount for a
snap. A local attacker could possibly use this issue to escalate privileges
and execute arbitrary code.

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 22.10

• snapd - 2.57.5+22.10ubuntu0.1

Ubuntu 22.04

• snapd - 2.57.5+22.04ubuntu0.1

Ubuntu 20.04

• snapd - 2.57.5+20.04ubuntu0.1

Ubuntu 18.04

• snapd - 2.57.5+18.04ubuntu0.1

Ubuntu 16.04

• snapd - 2.54.3+16.04.0ubuntu0.1~esm5
  Available with Ubuntu Pro

In general, a standard system update will make all the necessary changes.

References

• CVE-2022-3328