#VU53632 OS Command Injection in SonicWall NSM On-Prem - CVE-2021-20026

Vulnerability identifier: #VU53632

Vulnerability risk: Medium

CVSSv4.0: 6.3 [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]

CVE-ID: CVE-2021-20026

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
SonicWall NSM On-Prem
Server applications / Server solutions for antivurus protection

Vendor: SonicWall

Description

The vulnerability allows a remote user to execute arbitrary shell commands on the target system.

The vulnerability exists due to improper input validation when processing HTTP requests. A remote authenticated user can pass specially crafted HTTP request to the application and execute arbitrary OS commands on the target system.

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

Mitigation
Install updates from vendor's website.

Vulnerable software versions

SonicWall NSM On-Prem: before 2.2.1-R6

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External links
https://psirt.global.sonicwall.com/vuln-detail/SNWLID-2021-0014

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.