Vulnerability identifier: #VU53577

Vulnerability risk: Low

CVSSv3.1: 4.5 [CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2021-23020

CWE-ID: CWE-338

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
NGINX Controller
Server applications / Web servers

Vendor: F5 Networks

Description

The vulnerability allows a local user to bypass implemented security restrictions.

the vulnerability exists due to the NAAS API keys are generated using an insecure pseudo-random string and hashing algorithm. A local user can potentially generate a valid user key.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

NGINX Controller: 3.0.0 - 3.9.0

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External links
http://support.f5.com/csp/article/K45263486

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Q & A

Can this vulnerability be exploited remotely?

No. This vulnerability can be exploited locally. The attacker should have authentication credentials and successfully authenticate on the system.

Is there known malware, which exploits this vulnerability?

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