CVE-2020-1776 Invalidating or changing user does not invalidate session

Low 3.5 Published 20 Jul 2020 Updated 17 Sep 2024

Attackers can maintain active sessions for renamed or invalid agent users, bypassing intended access restrictions in OTRS.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: A user has to click or open something
Fix: Available

What is CVE-2020-1776?

CVE-2020-1776 is a low-severity authentication bypass vulnerability in Otrs Otrs, published on 20 Jul 2020. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

Official description

When an agent user is renamed or set to invalid the session belonging to the user is keept active. The session can not be used to access ticket data in the case the agent is invalid. This issue affects ((OTRS)) Community Edition: 6.0.28 and prior versions. OTRS: 7.0.18 and prior versions, 8.0.4. and prior versions.

Weakness: CWE-613

Which versions are affected by CVE-2020-1776?

It affects 1 product.

Products include Otrs Otrs.

How do I fix CVE-2020-1776?

Upgrade to a fixed version.

Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.

Is CVE-2020-1776 being exploited?

There is no known exploitation of CVE-2020-1776 in the wild and no public exploit code.

All Otrs Otrs vulnerabilities

Sources

Also known as DEBIAN-CVE-2020-1776, GHSA-vcrm-8v3j-v6f3, UBUNTU-CVE-2020-1776.