It was discovered that read_file() in apport/hookutils.py would follow symbolic links or open FIFOs. When this function is used by the xorg-hwe-18.04 package apport hooks, it could expose private data to other local users.
- https://bugs.launchpad.net/ubuntu/+source/apport/+bug/1917904
- https://github.com/n0-traces/cve_monitor