#VU9522 Double free error in F5 Networks products - CVE-2017-6166

Vulnerability identifier: #VU9522

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-2017-6166

CWE-ID: CWE-415

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 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 due to double free error when handling a user-supplied input. A remote attacker can send specially crafted fragmented data, trigger a double-free memory error in the Traffic Management Microkernel (TMM) and cause the TMM to crash, interrupting traffic processing while the TMM restarts.

Successful exploitation of the vulnerability results in denial of service.

Mitigation
Install update from vendor's website.

Vulnerable software versions

BIG-IP LTM: 12.0.0 - 12.1.1

BIG-IP AAM: 12.0.0 - 12.1.1

BIG-IP AFM: 12.0.0 - 12.1.1

BIG-IP Analytics: 12.0.0 - 12.1.1

BIG-IP APM: 12.0.0 - 12.1.1

BIG-IP ASM: 12.0.0 - 12.1.1

BIG-IP DNS: 12.0.0 - 12.1.1

BIG-IP Link Controller: 12.0.0 - 12.1.1

BIG-IP PEM: 12.0.0 - 12.1.1

BIG-IP WebSafe: 12.0.0 - 12.1.1

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External links
https://support.f5.com/csp/article/K65615624

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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.