#VU12774 Improper input validation in F5 Networks products - CVE-2017-6156

Vulnerability identifier: #VU12774

Vulnerability risk: Medium

CVSSv4.0: 5.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:U/U:Green]

CVE-ID: CVE-2017-6156

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 Edge Gateway
Hardware solutions / Routers & switches, VoIP, GSM, etc
BIG-IP Link Controller
Hardware solutions / Routers & switches, VoIP, GSM, etc
BIG-IP WebAccelerator
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 authenticated attacker to cause DoS condition on the target system.

The weakness exists due to improper input validation when the system is configured with a wildcard IPSec tunnel endpoint. A remote attacker can disrupt or impersonate the tunnels that have completed phase 1 IPSec negotiations.

Mitigation
Update to versions 13.0.0, 12.1.2, 11.6.1 HF2 or 11.5.6.

Vulnerable software versions

BIG-IP LTM: 11.2.1 - 12.1.1

BIG-IP AAM: 11.2.1 - 12.1.1

BIG-IP AFM: 11.2.1 - 12.1.1

BIG-IP Analytics: 11.2.1 - 12.1.1

BIG-IP APM: 11.2.1 - 12.1.1

BIG-IP ASM: 11.2.1 - 12.1.1

BIG-IP DNS: 11.2.1 - 12.1.1

BIG-IP Edge Gateway: 11.2.1 - 12.1.1

BIG-IP GTM: 11.2.1 - 12.1.1

BIG-IP Link Controller: 11.2.1 - 12.1.1

BIG-IP PEM: 11.2.1 - 12.1.1

BIG-IP WebAccelerator: 11.2.1 - 12.1.1

BIG-IP WebSafe: 11.2.1 - 12.1.1

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External links
https://support.f5.com/csp/article/K05263202

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote authenticated user via the Internet.

Is there known malware, which exploits this vulnerability?

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