Improper Certificate Validation in F5 BIG-IP products

1) Improper Certificate Validation

EUVDB-ID: #VU46071

Risk: Medium

CVSSv3.1: 6.4 [CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-5913

CWE-ID: CWE-295 - Improper Certificate Validation

Exploit availability: No

Description

The vulnerability allows a remote attacker to perform a man-in-the-middle (MitM) attack.

The vulnerability exists due to the BIG-IP Server SSL profile ignores revoked certificates, even when a valid CRL is present. A remote attacker can perform a MitM attack on the connections.

Mitigation

Install updates from vendor's website.

Vulnerable software versions

BIG-IP: 11.6.1 - 15.1.0

BIG-IP LTM: 11.6.1 - 15.1.0

BIG-IP AAM: 11.6.1 - 15.1.0

BIG-IP Advanced WAF: 11.6.1 - 15.1.0

BIG-IP AFM: 11.6.1 - 15.1.0

BIG-IP Analytics: 11.6.1 - 15.1.0

BIG-IP APM: 11.6.1 - 15.1.0

BIG-IP ASM: 11.6.1 - 15.1.0

BIG-IP DDHD: 11.6.1 - 15.1.0

BIG-IP DNS: 11.6.1 - 15.1.0

BIG-IP FPS: 11.6.0 - 15.1.0

BIG-IP GTM: 11.6.1 - 15.1.0

BIG-IP Link Controller: 11.6.1 - 15.1.0

BIG-IP PEM: 11.6.1 - 15.1.0

BIG-IP SSLO: 11.6.1 - 15.1.0

External links

http://support.f5.com/csp/article/K72752002

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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