#VU50610 Out-of-bounds write in F5 Networks products - CVE-2021-22973

Vulnerability identifier: #VU50610

Vulnerability risk: Medium

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

CVE-ID: CVE-2021-22973

CWE-ID: CWE-787

Exploitation vector: Remote access

Exploit availability: No public exploit available

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

Software vendor:
F5 Networks

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

The vulnerability exists due to a boundary error within the JSON parser function in iRules LX component. A remote attacker can pass specially crafted data with iRules LX commands to the system, trigger out-of-bounds write and crash the Traffic Management Microkernel (TMM) module.

Install updates from vendor's website.

• https://support.f5.com/csp/article/K13323323