Resource management error in F5 Networks products - CVE-2021-23003

Vulnerability identifier: #VU51491

CSH Severity: Medium

CVSS v4: 8.2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2021-23003

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 application when processing MPTCP traffic. A remote attacker can send specially crafted data to the system and force TMM to produce a core file, resulting in denial of service.

The vulnerability can be also triggered in rare circumstances by running the tmsh show conn command.

BIG-IP
BIG-IP DDHD
BIG-IP SSLO
BIG-IP Link Controller
BIG-IP AAM
BIG-IP DNS
BIG-IP GTM
BIG-IP ASM
BIG-IP APM
BIG-IP AFM
BIG-IP PEM
BIG-IP FPS
BIG-IP Analytics
BIG-IP LTM
BIG-IP Advanced WAF

Install updates from vendor's website.

BIG-IP - addressed in versions 11.6.5.3, 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP DDHD - addressed in versions 11.6.5.3, 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP Link Controller - addressed in versions 11.6.5.3, 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP GTM - addressed in versions 11.6.5.3, 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP ASM - addressed in versions 11.6.5.3, 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP AAM - addressed in versions 11.6.5.3, 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP APM - addressed in versions 11.6.5.3, 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP Advanced WAF - addressed in versions 11.6.5.3, 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP AFM - addressed in versions 11.6.5.3, 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP DNS - addressed in versions 11.6.5.3, 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP SSLO - addressed in versions 11.6.5.3, 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP PEM - addressed in versions 11.6.5.3, 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP FPS - addressed in versions 11.6.5.3, 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP Analytics - addressed in versions 11.6.5.3, 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP LTM - addressed in versions 11.6.5.3, 12.1.5.3, 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1

• https://support.f5.com/csp/article/K43470422

• Denial of service in BIG-IP MPTCP