Resource management error in F5 Networks products - CVE-2021-22999

Vulnerability identifier: #VU51394

CSH Severity: Medium

CVSS v4: 8.7 [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]

CVE-ID: CVE-2021-22999

CWE-ID: CWE-399

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 improper management of internal resources within the HTTP/2 Profile feature when processing aborted connections for HTTP/2 requests. A remote attacker can send multiple HTTP/2 requests and permanently close connections, which leads to a denial of service (DoS) condition, as the BIG-IP system indefinitely retains such streams unclosed.

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

Install updates from vendor's website.

BIG-IP AAM - addressed in versions 14.1.4, 15.1.0
BIG-IP APM - addressed in versions 14.1.4, 15.1.0
BIG-IP DNS - addressed in versions 14.1.4, 15.1.0
BIG-IP ASM - addressed in versions 14.1.4, 15.1.0
BIG-IP PEM - addressed in versions 14.1.4, 15.1.0
BIG-IP GTM - addressed in versions 14.1.4, 15.1.0
BIG-IP LTM - addressed in versions 14.1.4, 15.1.0
BIG-IP Link Controller - addressed in versions 14.1.4, 15.1.0
BIG-IP FPS - addressed in versions 14.1.4, 15.1.0
BIG-IP Analytics - addressed in versions 14.1.4, 15.1.0
BIG-IP AFM - addressed in versions 14.1.4, 15.1.0
BIG-IP - addressed in versions 14.1.4, 15.1.0

• https://support.f5.com/csp/article/K02333782

• Denial of srevice in HTTP/2 implementation in F5 BIG-IP