#VU9738 Improper input validation in F5 Networks products - CVE-2017-6136

Vulnerability identifier: #VU9738

Vulnerability risk: Low

CVSSv4.0: 6.6 [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/E:U/U:Clear]

CVE-ID: CVE-2017-6136

CWE-ID: CWE-20

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
BIG-IP LTM
Hardware solutions / Security hardware applicances
BIG-IP AFM
Hardware solutions / Security hardware applicances
BIG-IP Analytics
Hardware solutions / Security hardware applicances
BIG-IP APM
Hardware solutions / Security hardware applicances
BIG-IP ASM
Hardware solutions / Security hardware applicances
BIG-IP GTM
Hardware solutions / Security hardware applicances
BIG-IP PEM
Hardware solutions / Security hardware applicances
BIG-IP AAM
Hardware solutions / Routers & switches, VoIP, GSM, etc
BIG-IP DNS
Hardware solutions / Routers & switches, VoIP, GSM, etc
BIG-IP Link Controller
Hardware solutions / Routers & switches, VoIP, GSM, etc
BIG-IP WebSafe
Server applications / Server solutions for antivurus protection

Vendor: F5 Networks

Description

The vulnerability allows a remote attacker to cause DoS condition on the target system.

The vulnerability exists on the systems with the TCP Fast Open and Tail Loss Probe options enabled in the associated TCP profile due to insufficient validation of user-supplied input. A remote attacker can send specially crafted traffic to the target virtual server, trigger an unspecified flaw and cause the Traffic Management Microkernel (TMM) to restart and traffic to disrupt.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
The vulnerability is addressed in the following versions: 12.1.3, 13.1.0.

Vulnerable software versions

BIG-IP LTM: 12.1.0 - 13.0.0

BIG-IP AAM: 12.1.0 - 13.0.0

BIG-IP AFM: 12.1.0 - 13.0.0

BIG-IP Analytics: 12.1.0 - 13.0.0

BIG-IP APM: 12.1.0 - 13.0.0

BIG-IP ASM: 12.1.0 - 13.0.0

BIG-IP DNS: 12.1.0 - 13.0.0

BIG-IP GTM: 12.1.0 - 13.0.0

BIG-IP Link Controller: 12.1.0 - 13.0.0

BIG-IP PEM: 12.1.0 - 13.0.0

BIG-IP WebSafe: 12.1.0 - 13.0.0

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External links
https://support.f5.com/csp/article/K81137982

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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.