#VU51495 OS Command Injection in BIG-IP Advanced WAF and BIG-IP ASM - CVE-2021-22989

Vulnerability identifier: #VU51495

Vulnerability risk: Medium

CVSSv4.0: 6.1 [CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-22989

CWE-ID: CWE-78

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
BIG-IP Advanced WAF
Client/Desktop applications / Antivirus software/Personal firewalls
BIG-IP ASM
Hardware solutions / Security hardware applicances

Vendor: F5 Networks

Description

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

The vulnerability exists due to improper input validation within the Traffic Management User Interface (TMUI), when running in Appliance mode with Advanced WAF or ASM provisioned. A remote privileged user with the roles Administrator, Resource Administrator, or Application Security Administrator with network access to the Configuration utility, through the BIG-IP management port or self IP addresses can send specially crafted request to the system and execute arbitrary OS commands.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

BIG-IP Advanced WAF: 11.6.1 - 16.0.1

BIG-IP ASM: 11.6.1 HF1 - 16.0.1

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External links
https://support.f5.com/csp/article/K56142644

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Q & A

Can this vulnerability be exploited remotely?

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

Is there known malware, which exploits this vulnerability?

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