CVE-2017-6156

Severity: medium (CVSS 6.4 v3.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.9% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2018-04-13 · updated 2026-06-17

Description

When the F5 BIG-IP 12.1.0-12.1.1, 11.6.0-11.6.1, 11.5.1-11.5.5, or 11.2.1 system is configured with a wildcard IPSec tunnel endpoint, it may allow a remote attacker to disrupt or impersonate the tunnels that have completed phase 1 IPSec negotiations. The attacker must possess the necessary credentials to negotiate the phase 1 of the IPSec exchange to exploit this vulnerability; in many environment this limits the attack surface to other endpoints under the same administration.

Affected products

F5 BIG-IP APM: from 11.5.1 through 11.5.5; from 12.1.0 through 12.1.1; 11.2.1, 11.6.1
BIG-IP: from 11.5.1 through 11.5.5; from 12.1.0 through 12.1.1; 11.2.1, 11.6.1
F5 Big-Ip Analytics: from 11.5.1 through 11.5.5; from 12.1.0 through 12.1.1; 11.2.1, 11.6.1
F5 Networks, Inc. BIG-IP (AAM): from 11.5.1 through 11.5.5; from 12.1.0 through 12.1.1; 11.2.1, 11.6.1
BIG-IP ASM: from 11.5.1 through 11.5.5; from 12.1.0 through 12.1.1; 11.2.1, 11.6.1
F5 BIG-IP DNS: from 11.5.1 through 11.5.5; from 12.1.0 through 12.1.1; 11.2.1, 11.6.1
F5 Big-Ip Edge Gateway: from 11.5.1 through 11.5.5; from 12.1.0 through 12.1.1; 11.2.1, 11.6.1
F5 Big-Ip Global Traffic Manager: from 11.5.1 through 11.5.5; from 12.1.0 through 12.1.1; 11.2.1, 11.6.1
F5 Big-Ip Link Controller: from 11.5.1 through 11.5.5; from 12.1.0 through 12.1.1; 11.2.1, 11.6.1
F5 BIG-IP (LTM): from 11.5.1 through 11.5.5; from 12.1.0 through 12.1.1; 11.2.1, 11.6.1
F5 Networks, Inc. BIG-IP (PEM): from 11.5.1 through 11.5.5; from 12.1.0 through 12.1.1; 11.2.1, 11.6.1
F5 Big-Ip Webaccelerator: from 11.5.1 through 11.5.5; from 12.1.0 through 12.1.1; 11.2.1, 11.6.1
F5 Big-Ip Websafe: from 11.5.1 through 11.5.5; from 12.1.0 through 12.1.1; 11.2.1, 11.6.1

References

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