CVE-2019-3972 Denial of service in Comodo Antivirus

Medium 5.5 Published 17 Jul 2019 Updated 4 Aug 2024

A low-privileged attacker can crash Comodo Antivirus by modifying a shared memory object, causing a denial of service.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: Not needed
Fix: None listed

What is CVE-2019-3972?

CVE-2019-3972 is a medium-severity denial of service vulnerability in Comodo Antivirus, published on 17 Jul 2019. It can only be exploited from the same machine or local network, with no action from the victim.

Official description

Comodo Antivirus versions 12.0.0.6810 and below are vulnerable to Denial of Service affecting CmdAgent.exe via an unprotected section object "<GUID>_CisSharedMemBuff". This section object is exposed by CmdAgent and contains a SharedMemoryDictionary object, which allows a low privileged process to modify the object data causing CmdAgent.exe to crash.

Weakness: CWE-125

Which versions are affected by CVE-2019-3972?

It affects 1 product.

Products include Comodo Antivirus.

How do I fix CVE-2019-3972?

No fix has been published for CVE-2019-3972 yet. Limit exposure of the affected software until one is available.

Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.

Is CVE-2019-3972 being exploited?

There is no known exploitation of CVE-2019-3972 in the wild and no public exploit code.

Sources

Also known as GHSA-r5cr-x7vg-hh88.