Memory leak in F5 Networks products - CVE-2020-27713

Vulnerability identifier: #VU49057

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-2020-27713

CWE-ID: CWE-401

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to perform DoS attack on the target system.

The vulnerability exists due memory leak when a BIG-IP AFM HTTP security profile is applied to a virtual server and the BIG-IP system receives a request with specific characteristics. A remote attacker can send specially crafted traffic to the server, force TMM module to leak memory and perform a denial of service (DoS) attack.

BIG-IP
BIG-IP DDHD
BIG-IP SSLO
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
BIG-IP Advanced WAF

Install updates from vendor's website.

BIG-IP - update to 13.1.3.5
BIG-IP LTM - update to 13.1.3.5
BIG-IP AAM - update to 13.1.3.5
BIG-IP Advanced WAF - update to 13.1.3.5
BIG-IP AFM - update to 13.1.3.5
BIG-IP Analytics - update to 13.1.3.5
BIG-IP APM - update to 13.1.3.5
BIG-IP ASM - update to 13.1.3.5
BIG-IP DDHD - update to 13.1.3.5
BIG-IP DNS - update to 13.1.3.5
BIG-IP FPS - update to 13.1.3.5
BIG-IP GTM - update to 13.1.3.5
BIG-IP Link Controller - update to 13.1.3.5
BIG-IP PEM - update to 13.1.3.5
BIG-IP SSLO - update to 13.1.3.5

• https://support.f5.com/csp/article/K37960100

• Denial of service in TMM module in F5 BIG-IP