ESB-2020.3244 – [Ubuntu] LTSP Display Manager: Root compromise – Existing account

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256

===========================================================================
             AUSCERT External Security Bulletin Redistribution

                               ESB-2020.3244
             USN-4533-1: LTSP Display Manager vulnerabilities
                             23 September 2020

===========================================================================

        AusCERT Security Bulletin Summary
        ---------------------------------

Product:           LTSP Display Manager
Publisher:         Ubuntu
Operating System:  Ubuntu
Impact/Access:     Root Compromise -- Existing Account
Resolution:        Patch/Upgrade
CVE Names:         CVE-2019-20373  

Reference:         ESB-2020.0119

Original Bulletin: 
   https://usn.ubuntu.com/4533-1/

- --------------------------BEGIN INCLUDED TEXT--------------------

USN-4533-1: LTSP Display Manager vulnerabilities
22 September 2020

LTSP Display Manager could be made to escalate user privileges.
Releases

  o Ubuntu 20.04 LTS

Packages

  o ldm - LTSP display manager

Details

Veeti Vetelainen 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

  o ldm - 2:2.18.06-1+deb10u1build0.20.04.1
  o ldm-server - 2:2.18.06-1+deb10u1build0.20.04.1

In general, a standard system update will make all the necessary changes.

References

  o https://launchpad.net/bugs/1839431

- --------------------------END INCLUDED TEXT--------------------

You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.

NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members.  As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.

NOTE: This is only the original release of the security bulletin.  It may
not be updated when updates to the original are made.  If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.

Contact information for the authors of the original document is included
in the Security Bulletin above.  If you have any questions or need further
information, please contact them directly.

Previous advisories and external security bulletins can be retrieved from:

        https://www.auscert.org.au/bulletins/

===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072

Internet Email: auscert@auscert.org.au
Facsimile:      (07) 3365 7031
Telephone:      (07) 3365 4417 (International: +61 7 3365 4417)
                AusCERT personnel answer during Queensland business hours
                which are GMT+10:00 (AEST).
                On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: http://www.auscert.org.au/render.html?it=1967
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=veKw
-----END PGP SIGNATURE-----

Read More

The post ESB-2020.3244 – [Ubuntu] LTSP Display Manager: Root compromise – Existing account appeared first on Malware Devil.

https://malwaredevil.com/2020/09/23/esb-2020-3244-ubuntu-ltsp-display-manager-root-compromise-existing-account/?utm_source=rss&utm_medium=rss&utm_campaign=esb-2020-3244-ubuntu-ltsp-display-manager-root-compromise-existing-account