CVE-2021-34994: Commvault CommCell DataProvider JavaScript Sandbox Escape Vulnerability
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.
Other sources
This vulnerability allows remote attackers to execute arbitrary code on affected installations of Commvault CommCell. 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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2021-34994?
CVE-2021-34994 is classified as a critical vulnerability due to its potential for remote code execution.
How do I fix CVE-2021-34994?
To fix CVE-2021-34994, update your Commvault CommCell installation to the latest version recommended by the vendor.
Who is affected by CVE-2021-34994?
Only installations of Commvault CommCell version 11.22.22 are affected by CVE-2021-34994.
Can CVE-2021-34994 be exploited without authentication?
No, although the authentication mechanism can be bypassed, some form of authentication is still required to exploit CVE-2021-34994.
What type of attacks can CVE-2021-34994 enable?
CVE-2021-34994 allows remote attackers to execute arbitrary code, potentially compromising the affected system.