CVE-2021-34996 Command injection in CommCell

High 8.8 Published 13 Jan 2022 Updated 4 Aug 2024

Remote attackers can execute arbitrary code as SYSTEM via command injection in the Demo_ExecuteProcessOnGroup workflow, bypassing authentication.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Over the internet
Victim action needed: Not needed
Fix: None listed

What is CVE-2021-34996?

CVE-2021-34996 is a high-severity command injection vulnerability in Commvault CommCell, published on 13 Jan 2022. Any signed-in user can exploit it over the network, with no action from the victim.

Official description

This vulnerability allows remote attackers to execute arbitrary code on affected installations of Commvault CommCell 11.22.22. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the Demo_ExecuteProcessOnGroup workflow. By creating a workflow, an attacker can specify an arbitrary command to be executed. An attacker can leverage this vulnerability to execute code in the context of SYSTEM. Was ZDI-CAN-13889.

Weakness: CWE-749

Which versions are affected by CVE-2021-34996?

It affects 1 product.

Products include Commvault Commcell.

How do I fix CVE-2021-34996?

No fix has been published for CVE-2021-34996 yet. Limit exposure of the affected software until one is available.

Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.

Is CVE-2021-34996 being exploited?

There is no known exploitation of CVE-2021-34996 in the wild and no public exploit code.

Sources

Also known as GHSA-f572-r3rr-hjcx.