CVE-2021-34994 Code injection in CommCell

High 8.8 Published 13 Jan 2022 Updated 4 Aug 2024

Remote attackers can bypass authentication and execute arbitrary Java code by injecting JavaScript into the DataProvider class.

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-2021-34994?

CVE-2021-34994 is a high-severity code 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 DataProvider class. The issue results from the lack of proper validation of a user-supplied string before executing it as JavaScript code. An attacker can leverage this vulnerability to escape the JavaScript sandbox and execute Java code in the context of NETWORK SERVICE. Was ZDI-CAN-13755.

Weakness: CWE-94, CWE-20

Which versions are affected by CVE-2021-34994?

It affects 1 product.

Products include Commvault Commcell.

How do I fix CVE-2021-34994?

No fix has been published for CVE-2021-34994 yet. Limit exposure of the affected software until one is available.

Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.

Is CVE-2021-34994 being exploited?

There is no known exploitation of CVE-2021-34994 in the wild and no public exploit code.

Sources

Also known as GHSA-xvcw-283x-r7pw.