Memory leak in F5 Networks products - CVE-2020-5883

Vulnerability identifier: #VU49042

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-2020-5883

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 processing POST requests on HTTP Explicit Proxy Virtual Server with configured HTTP_PROXY_REQUEST iRule. A remote attacker can send a specially crafted HTTP request to the virtual server and perform a denial of service (DoS) attack.

BIG-IP AAM
BIG-IP WebAccelerator
BIG-IP Edge Gateway
BIG-IP Link Controller
BIG-IP PEM
BIG-IP FPS
BIG-IP APM
BIG-IP AFM
BIG-IP LTM
BIG-IP ASM

Install updates from vendor's website.

BIG-IP AAM - addressed in versions 13.1.3.2, 14.0.1.1, 14.1.2.4, 15.0.1.1
BIG-IP PEM - addressed in versions 13.1.3.2, 14.0.1.1, 14.1.2.4, 15.0.1.1
BIG-IP FPS - addressed in versions 13.1.3.2, 14.0.1.1, 14.1.2.4, 15.0.1.1
BIG-IP APM - addressed in versions 13.1.3.2, 14.0.1.1, 14.1.2.4, 15.0.1.1
BIG-IP AFM - addressed in versions 13.1.3.2, 14.0.1.1, 14.1.2.4, 15.0.1.1
BIG-IP LTM - addressed in versions 13.1.3.2, 14.0.1.1, 14.1.2.4, 15.0.1.1
BIG-IP WebAccelerator - addressed in versions 13.1.3.2, 14.0.1.1, 14.1.2.4, 15.0.1.1
BIG-IP ASM - addressed in versions 13.1.3.2, 14.0.1.1, 14.1.2.4, 15.0.1.1
BIG-IP Edge Gateway - addressed in versions 13.1.3.2, 14.0.1.1, 14.1.2.4, 15.0.1.1
BIG-IP Link Controller - addressed in versions 13.1.3.2, 14.0.1.1, 14.1.2.4, 15.0.1.1

• https://support.f5.com/csp/article/K12234501

• Denial of service in Virtual Server implementation on some BIG-IP systems