CVE-2021-34995: Commvault CommCell DownloadCenterUploadHandler Arbitrary File Upload Remote Code Execution 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 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.
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 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.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2021-34995?
CVE-2021-34995 has been assigned a high severity rating due to the potential for remote code execution.
How do I fix CVE-2021-34995?
To fix CVE-2021-34995, upgrade Commvault CommCell to the latest version that addresses this vulnerability.
Who is affected by CVE-2021-34995?
CVE-2021-34995 affects installations of Commvault CommCell version 11.22.22.
What type of attacks can CVE-2021-34995 facilitate?
CVE-2021-34995 can facilitate remote code execution attacks due to a bypass in the authentication mechanism.
Is authentication required to exploit CVE-2021-34995?
Yes, while authentication is required, the vulnerability allows for bypassing the existing authentication mechanism.