CVE-2021-34995 — HIGH (8.8)

Vulnerability 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 DownloadCenterUploadHandler class. The issue results from the lack of proper validation of user-supplied data, which can allow the upload of arbitrary files. An attacker can leverage this vulnerability to execute code in the context of NETWORK SERVICE. Was ZDI-CAN-13756.

CVSS Score

8.8

HIGH

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

LOW

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Commvault	Commcell	11.22.22

Related Weaknesses (CWE)

CWE-434

References

https://www.zerodayinitiative.com/advisories/ZDI-21-1330/Third Party AdvisoryVDB Entry
https://www.zerodayinitiative.com/advisories/ZDI-21-1330/Third Party AdvisoryVDB Entry

FAQ

What is CVE-2021-34995?

CVE-2021-34995 is a vulnerability with a CVSS score of 8.8 (HIGH). 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 ex...

How severe is CVE-2021-34995?

CVE-2021-34995 has been rated HIGH with a CVSS base score of 8.8/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-34995?

Check the references section above for vendor advisories and patch information. Affected products include: Commvault Commcell.