Debian 11: DLA-4235-1 critical: sudo privilege escalation

Rich Mirch discovered that sudo, a program designed to provide limited
super user privileges to specific users, does not correctly handle the
host (-h or --host) option. Due to a bug the host option was not
restricted to listing privileges only and could be used when running a
command via sudo or editing a file with sudoedit. Depending on the rules
present in the sudoers file the flaw might allow a local privilege
escalation attack.


For Debian 11 bullseye, this problem has been fixed in version
1.9.5p2-3+deb11u2.

We recommend that you upgrade your sudo packages.

For the detailed security status of sudo please refer to
its security tracker page at:
https://security-tracker.debian.org/tracker/source-package/sudo

Further information about Debian LTS security advisories, how to apply
these updates to your system and frequently asked questions can be
found at: https://wiki.debian.org/LTS