USN-6588-2: PAM vulnerability
26 March 2024
PAM could be made to stop responding if it opened a specially crafted file.
Releases
Packages
- pam - Pluggable Authentication Modules
Details
USN-6588-1 fixed a vulnerability in PAM. This update
provides the corresponding updates for Ubuntu 14.04 LTS,
Ubuntu 16.04 LTS, and Ubuntu 18.04 LTS.
Original advisory details:
Matthias Gerstner discovered that the PAM pam_namespace module incorrectly
handled special files when performing directory checks. A local attacker
could possibly use this issue to cause PAM to stop responding, resulting in
a denial of service.
Update instructions
The problem can be corrected by updating your system to the following package versions:
Ubuntu 18.04
-
libpam-modules
-
1.1.8-3.6ubuntu2.18.04.6+esm1
Available with Ubuntu Pro
Ubuntu 16.04
-
libpam-modules
-
1.1.8-3.2ubuntu2.3+esm5
Available with Ubuntu Pro
Ubuntu 14.04
-
libpam-modules
-
1.1.8-1ubuntu2.2+esm4
Available with Ubuntu Pro
In general, a standard system update will make all the necessary changes.
References
Related notices
- USN-6588-1: libpam-cracklib, libpam-modules-bin, pam, libpam-doc, libpam-modules, libpam0g, libpam0g-dev, libpam-runtime