Input validation error in F5 Networks products - CVE-2020-5856

Vulnerability identifier: #VU25004

CSH Severity: Low

CVSS v4: 6.3 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N]

CVE-ID: CVE-2020-5856

CWE-ID: CWE-20

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to insufficient validation of user-supplied input while processing specifically crafted traffic using the default "xnet" driver. A remote attacker can cause the Traffic Management Microkernel (TMM) process to restart and perform a denial-of-service attack on the BIG-IP Virtual Edition (VE) system hosted in Amazon Web Services (AWS).

BIG-IP PEM
BIG-IP LTM
BIG-IP AFM
BIG-IP APM
BIG-IP Analytics
BIG-IP FPS
BIG-IP GTM
BIG-IP ASM
BIG-IP DNS
BIG-IP AAM
BIG-IP Link Controller
BIG-IP

Install updates from vendor's website.

BIG-IP PEM - addressed in versions 14.1.2.3, 15.1.0
BIG-IP DNS - addressed in versions 14.1.2.3, 15.1.0
BIG-IP - addressed in versions 14.1.2.3, 15.1.0
BIG-IP LTM - addressed in versions 14.1.2.3, 15.1.0
BIG-IP AFM - addressed in versions 14.1.2.3, 15.1.0
BIG-IP AAM - addressed in versions 14.1.2.3, 15.1.0
BIG-IP APM - addressed in versions 14.1.2.3, 15.1.0
BIG-IP Analytics - addressed in versions 14.1.2.3, 15.1.0
BIG-IP FPS - addressed in versions 14.1.2.3, 15.1.0
BIG-IP GTM - addressed in versions 14.1.2.3, 15.1.0
BIG-IP ASM - addressed in versions 14.1.2.3, 15.1.0
BIG-IP Link Controller - addressed in versions 14.1.2.3, 15.1.0

• https://support.f5.com/csp/article/K00025388

• Denial of service in F5 BIG-IP TMM AWS