Ubuntu Security Notice USN-4533-1
September 22, 2020
ldm vulnerabilities
==========================================================================
A security issue affects these releases of Ubuntu and its derivatives:
- Ubuntu 20.04 LTS
Summary:
LTSP Display Manager could be made to escalate user privileges.
Software Description:
- ldm: LTSP display manager
Details:
Veeti Veteläinen discovered that the LTSP Display Manager
(ldm)
incorrectly handled user logins from unsupported shells. A local
attacker
could possibly use this issue to gain root privileges.
(CVE-2019-20373)
Update instructions:
The problem can be corrected by updating your system to the
following
package versions:
Ubuntu 20.04 LTS:
ldm 2:2.18.06-1+deb10u1build0.20.04.1
ldm-server 2:2.18.06-1+deb10u1build0.20.04.1
In general, a standard system update will make all the necessary changes.
References:
https://usn.ubuntu.com/4533-1
https://launchpad.net/bugs/1839431
Package Information:
https://launchpad.net/ubuntu/+source/ldm/2:2.18.06-1+deb10u1build0.20.04.1
Read more https://packetstormsecurity.com/files/159270/USN-4533-1.txt