[USN-4533-1] LTSP Display Manager vulnerabilities

Avital Ostromich avital.ostromich at canonical.com
Tue Sep 22 21:04:20 UTC 2020

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


LTSP Display Manager could be made to escalate user privileges.

Software Description:
- ldm: LTSP display manager


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.


Package Information:

-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 488 bytes
Desc: OpenPGP digital signature
URL: <https://lists.ubuntu.com/archives/ubuntu-security-announce/attachments/20200922/775f540b/attachment.sig>

More information about the ubuntu-security-announce mailing list