CVE-2022-3979 NagVis CoreLogonMultisite.php checkAuthCookie type conversion

Medium 5.6 Published 13 Nov 2022 Updated 3 Nov 2025

Remote attackers can bypass authentication in NagVis via type conversion flaws in cookie validation, requiring high complexity and permissions.

Exploited in the wild: Not known
Login needed: Not needed
Attackable: Over the internet
Victim action needed: Not needed
Fix: Available

What is CVE-2022-3979?

CVE-2022-3979 is a medium-severity authentication bypass vulnerability in NagVis, published on 13 Nov 2022. An attacker can exploit it over the internet without logging in, with no action from the victim.

Official description

A vulnerability was found in NagVis up to 1.9.33 and classified as problematic. This issue affects the function checkAuthCookie of the file share/server/core/classes/CoreLogonMultisite.php. The manipulation of the argument hash leads to incorrect type conversion. The attack may be initiated remotely. The complexity of an attack is rather high. The exploitation is known to be difficult. Upgrading to version 1.9.34 is able to address this issue. The identifier of the patch is 7574fd8a2903282c2e0d1feef5c4876763db21d5. It is recommended to upgrade the affected component. The identifier VDB-213557 was assigned to this vulnerability.

Weakness: CWE-704

Which versions are affected by CVE-2022-3979?

It affects 1 product.

Products include Nagvis Nagvis.

How do I fix CVE-2022-3979?

Upgrade to a fixed version.

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

Is CVE-2022-3979 being exploited?

There is no known exploitation of CVE-2022-3979 in the wild and no public exploit code.

Sources

Also known as DEBIAN-CVE-2022-3979, GHSA-v69g-856v-c9cc, UBUNTU-CVE-2022-3979.