Denial of service in TMM module in F5 BIG-IP

1) Memory leak

EUVDB-ID: #VU49057

Risk: Medium

CVSSv3.1: 6.5 [CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2020-27713

CWE-ID: CWE-401 - Missing release of memory after effective lifetime

Exploit availability: No

Description

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.

Mitigation

Install update from vendor's website.

Vulnerable software versions

BIG-IP: 13.1.3.4

BIG-IP LTM: 13.1.3.4

BIG-IP AAM: 13.1.3.4

BIG-IP Advanced WAF: 13.1.3.4

BIG-IP AFM: 13.1.3.4

BIG-IP Analytics: 13.1.3.4

BIG-IP APM: 13.1.3.4

BIG-IP ASM: 13.1.3.4

BIG-IP DDHD: 13.1.3.4

BIG-IP DNS: 13.1.3.4

BIG-IP FPS: 13.1.3.4

BIG-IP GTM: 13.1.3.4

BIG-IP Link Controller: 13.1.3.4

BIG-IP PEM: 13.1.3.4

BIG-IP SSLO: 13.1.3.4

CPE2.3

• cpe:2.3:h:f5_networks:big-ip:13.1.3.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip_ltm:13.1.3.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip_aam:13.1.3.4:*:*:*:*:*:*:*
• cpe:2.3:a:f5_networks:big-ip_advanced_waf:13.1.3.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip_afm:13.1.3.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip_analytics:13.1.3.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip_apm:13.1.3.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip_asm:13.1.3.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip_ddhd:13.1.3.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip_dns:13.1.3.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip_fps:13.1.3.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip_gtm:13.1.3.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip_link_controller:13.1.3.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip_pem:13.1.3.4:*:*:*:*:*:*:*
• cpe:2.3:h:f5_networks:big-ip_sslo:13.1.3.4:*:*:*:*:*:*:*

External links

http://support.f5.com/csp/article/K37960100

Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.