Vulnerability Details : 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 category: Execute code
Exploit prediction scoring system (EPSS) score for CVE-2021-34995
Probability of exploitation activity in the next 30 days: 3.03%
Percentile, the proportion of vulnerabilities that are scored at or less: ~ 91 % EPSS Score History EPSS FAQ
CVSS scores for CVE-2021-34995
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source |
|---|---|---|---|---|---|
|
6.5
|
MEDIUM | AV:N/AC:L/Au:S/C:P/I:P/A:P |
8.0
|
6.4
|
NIST |
|
8.8
|
HIGH | CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
Zero Day Initiative |
|
8.8
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H |
2.8
|
5.9
|
NIST |
CWE ids for CVE-2021-34995
-
The product allows the attacker to upload or transfer files of dangerous types that can be automatically processed within the product's environment.Assigned by:
- nvd@nist.gov (Primary)
- zdi-disclosures@trendmicro.com (Secondary)
References for CVE-2021-34995
-
https://www.zerodayinitiative.com/advisories/ZDI-21-1330/
ZDI-21-1330 | Zero Day InitiativeThird Party Advisory;VDB Entry
Products affected by CVE-2021-34995
- cpe:2.3:a:commvault:commcell:11.22.22:*:*:*:*:*:*:*