CVE-2017-6166

Name: CVE-2017-6166
Creator: NVD / NIST
Published: 2017-11-22T16:29:00.337+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 5.9/10EPSS 1.93%

Last modified Jun 17, 2026

CVE-2017-6166 is a medium-severity vulnerability rated 5.9/10 on the CVSS scale. In BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, DNS, Link Controller, PEM, and WebSafe software 12.0.0 to 12.1.1, in some cases the Traffic Management Microkernel (TMM) may crash when processing fragmented packets. This vulnerability affects TMM through a virtual server configured with a FastL4 profile. EPSS estimates a 1.93% chance of exploitation in the next 30 days.

Description

In BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, DNS, Link Controller, PEM, and WebSafe software 12.0.0 to 12.1.1, in some cases the Traffic Management Microkernel (TMM) may crash when processing fragmented packets. This vulnerability affects TMM through a virtual server configured with a FastL4 profile. Traffic processing is disrupted while TMM restarts. If the affected BIG-IP system is configured as part of a device group, it will trigger a failover to the peer device.

Metrics

CVSS 3.1

5.9/10

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Probability

1.93%

77.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-415

Affected Software

Vendor	Product	Versions
F5	Big-Ip Afm	>= 12.0.0, <= 12.1.1
F5	Big-Ip Analytics	>= 12.0.0, <= 12.1.1
F5	Big-Ip Apm	>= 12.0.0, <= 12.1.1
F5	Big-Ip Application Acceleration Manager	>= 12.0.0, <= 12.1.1
F5	Big-Ip Asm	>= 12.0.0, <= 12.1.1
F5	Big-Ip Dns	>= 12.0.0, <= 12.1.1
F5	Big-Ip Link Controller	>= 12.0.0, <= 12.1.1
F5	Big-Ip Ltm	>= 12.0.0, <= 12.1.1
F5	Big-Ip Pem	>= 12.0.0, <= 12.1.1
F5	F5 Websafe	>= 12.0.0, <= 12.1.1
F5	Linerate	>= 2.5.0, <= 2.6.2

References

http://www.securityfocus.com/bid/102264Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039949Third Party Advisory, VDB Entry
https://support.f5.com/csp/article/K65615624Issue Tracking, Mitigation, Vendor Advisory
http://www.securityfocus.com/bid/102264Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039949Third Party Advisory, VDB Entry
https://support.f5.com/csp/article/K65615624Issue Tracking, Mitigation, Vendor Advisory

Timeline

Published: Nov 22, 2017
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2017-6166?

How severe is CVE-2017-6166?

CVE-2017-6166 has a CVSS score of 5.9/10 (MEDIUM severity). The EPSS model estimates a 1.93% probability of exploitation in the next 30 days.

How do I fix CVE-2017-6166?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2017-6166?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST