What is CVE-2021-34995?

CVE-2021-34995 is a high-severity vulnerability in Commvault Commcell, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2022-01-13.

How severe is CVE-2021-34995?

High severity. CVSS v3 base score is 8.8 out of 10.

Arbitrary file upload in Commvault Commcell

CVE-2021-34995

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.

Vulnerability class: Unrestricted File Upload

EPSS: 0.689 (99.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H.

Affected products

Commvault Commcell — versions 11.22.22

Weakness classification (CWE)

CWE-434 — Unrestricted Upload of File with Dangerous Type

References

zdi-disclosures@trendmicro.com (VDB Entry, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2021-34995?: CVE-2021-34995 is a high-severity vulnerability in Commvault Commcell, classified under Unrestricted Upload of File with Dangerous Type. CVSS score: 8.8/10. Published 2022-01-13.
How severe is CVE-2021-34995?: High severity. CVSS v3 base score is 8.8 out of 10.