SB2021112404 - Multiple vulnerabilities in Commvault CommCell

Description

This security bulletin contains information about 5 vulnerabilities.

1) Improper Authentication (CVE-ID: CVE-2021-34993)

CWE-ID: CWE-287 - Improper Authentication

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber

The vulnerability allows a remote attacker to bypass authentication process.

The vulnerability exists due to an error in when processing authentication requests within the CVSearchService service. A remote attacker can bypass authentication process and gain unauthorized access to the application.

2) Arbitrary file upload (CVE-ID: CVE-2021-34997)

CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload within the AppStudioUploadHandler class. A remote authenticated attacker can upload a malicious file and execute it on the server.

3) Code Injection (CVE-ID: CVE-2021-34996)

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation within the Demo_ExecuteProcessOnGroup workflow. A remote authenticated attacker can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

4) Code Injection (CVE-ID: CVE-2021-34994)

CWE-ID: CWE-94 - Improper Control of Generation of Code ('Code Injection')

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to execute arbitrary code on the target system.

The vulnerability exists due to improper input validation of a user-supplied string before executing it as JavaScript code within the DataProvider class. A remote authenticated attacker can send a specially crafted request and execute arbitrary code on the target system.

Successful exploitation of this vulnerability may result in complete compromise of vulnerable system.

5) Arbitrary file upload (CVE-ID: CVE-2021-34995)

CWE-ID: CWE-434 - Unrestricted Upload of File with Dangerous Type

CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green

The vulnerability allows a remote attacker to compromise vulnerable system.

The vulnerability exists due to insufficient validation of file during file upload within the DownloadCenterUploadHandler class. A remote authenticated attacker can upload a malicious file and execute it on the server.

Remediation

Install update from vendor's website.

References

• https://www.zerodayinitiative.com/advisories/ZDI-21-1328/
• https://www.zerodayinitiative.com/advisories/ZDI-21-1332/
• https://www.zerodayinitiative.com/advisories/ZDI-21-1331/
• https://www.zerodayinitiative.com/advisories/ZDI-21-1329/
• https://www.zerodayinitiative.com/advisories/ZDI-21-1330/