Improper certificate revocation in curl implementation within Command Line Interface, EAV Monitors and iRules components in F5 BIG-IP products



Risk Medium
Patch available NO
Number of vulnerabilities 1
CVE-ID CVE-2020-8286
CWE-ID CWE-299
Exploitation vector Network
Public exploit N/A
Vulnerable software
Subscribe 		BIG-IP DNS
Hardware solutions / Routers & switches, VoIP, GSM, etc

BIG-IP Link Controller
Hardware solutions / Routers & switches, VoIP, GSM, etc

BIG-IP AAM
Hardware solutions / Routers & switches, VoIP, GSM, etc

BIG-IP SSLO
Hardware solutions / Firmware

BIG-IP DDHD
Hardware solutions / Firmware

BIG-IP
Hardware solutions / Firmware

BIG-IP PEM
Hardware solutions / Security hardware applicances

BIG-IP GTM
Hardware solutions / Security hardware applicances

BIG-IP FPS
Hardware solutions / Security hardware applicances

BIG-IP ASM
Hardware solutions / Security hardware applicances

BIG-IP Analytics
Hardware solutions / Security hardware applicances

BIG-IP AFM
Hardware solutions / Security hardware applicances

BIG-IP LTM
Hardware solutions / Security hardware applicances

BIG-IP APM
Hardware solutions / Security hardware applicances

BIG-IP Advanced WAF
Client/Desktop applications / Antivirus software/Personal firewalls

Vendor F5 Networks

Security Bulletin

This security bulletin contains one medium risk vulnerability.

1) Improper Check for Certificate Revocation

EUVDB-ID: #VU48895

Risk: Medium

CVSSv3.1: 5.7 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-8286

CWE-ID: CWE-299 - Improper Check for Certificate Revocation

Exploit availability: No

Description

The vulnerability allows a remote attacker to bypass implemented security restrictions.

The vulnerability exists due to incorrectly implemented checks for OCSP stapling. A remote attacker can provide a fraudulent OCSP response that would appear fine, instead of the real one.

Mitigation

Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

BIG-IP DNS: 13.1.0 - 16.0.1.1

BIG-IP SSLO: 13.1.0 - 16.0.1.1

BIG-IP PEM: 13.1.0 - 16.0.1.1

BIG-IP Link Controller: 13.1.0 - 16.0.1.1

BIG-IP GTM: 13.1.0 - 16.0.1.1

BIG-IP FPS: 13.1.0 - 16.0.1.1

BIG-IP DDHD: 13.1.0 - 16.0.1.1

BIG-IP ASM: 13.1.0 - 16.0.1.1

BIG-IP Analytics: 13.1.0 - 16.0.1.1

BIG-IP AFM: 13.1.0 - 16.0.1.1

BIG-IP Advanced WAF: 13.1.0 - 16.0.1.1

BIG-IP AAM: 13.1.0 - 16.0.1.1

BIG-IP LTM: 13.1.0 - 16.0.1.1

BIG-IP: 13.1.0 - 16.0.1.1

BIG-IP APM: 13.1.0 - 16.0.1.1

CPE2.3 External links

http://support.f5.com/csp/article/K15402727


Q & A

Can this vulnerability be exploited remotely?

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

How the attacker can exploit this vulnerability?

The attacker would have to send a specially crafted request to the affected device in order to exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

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



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