CVE-2020-8831

Priority
Description
Apport creates a world writable lock file with root ownership in the world
writable /var/lock/apport directory. If the apport/ directory does not
exist (this is not uncommon as /var/lock is a tmpfs), it will create the
directory, otherwise it will simply continue execution using the existing
directory. This allows for a symlink attack if an attacker were to create a
symlink at /var/lock/apport, changing apport's lock file location. This
file could then be used to escalate privileges, for example. Fixed in
versions 2.20.1-0ubuntu2.23, 2.20.9-0ubuntu7.14, 2.20.11-0ubuntu8.8 and
2.20.11-0ubuntu22.
Assigned-to
amurray
Notes
Package
Upstream:needs-triage
Ubuntu 12.04 ESM (Precise Pangolin):DNE
Ubuntu 14.04 ESM (Trusty Tahr):needs-triage
Ubuntu 16.04 LTS (Xenial Xerus):released (2.20.1-0ubuntu2.23)
Ubuntu 18.04 LTS (Bionic Beaver):released (2.20.9-0ubuntu7.14)
Ubuntu 19.10 (Eoan Ermine):released (2.20.11-0ubuntu8.8)
Ubuntu 20.04 LTS (Focal Fossa):released (2.20.11-0ubuntu22)
Ubuntu 20.10 (Groovy Gorilla):released (2.20.11-0ubuntu22)
More Information

Updated: 2020-05-07 13:15:16 UTC (commit 9c52fbc2943459298ae6679cb4a2c01c5d1eed4d)