CVE-2017-6142 — X509 certificate verification was not correctly implemented in the early access

X509 certificate verification was not correctly implemented in the early access "user id" feature in the F5 BIG-IP Advanced Firewall Manager versions 13.0.0, 12.1.0-12.1.2, and 11.6.0-11.6.2, and thus did not properly validate the remote server's identity on certai

01What is this vulnerability?

X509 certificate verification was not correctly implemented in the early access "user id" feature in the F5 BIG-IP Advanced Firewall Manager versions 13.0.0, 12.1.0-12.1.2, and 11.6.0-11.6.2, and thus did not properly validate the remote server's identity on certain versions of BIG-IP.

02Affected products

Vendor	Product	Versions
F5 Networks, Inc.	BIG	IP AFM — 13.0.0, 12.1.0 - 12.1.2, 11.6.0 - 11.6.2

03Active exploitation status

Not currently listed on the CISA Known Exploited Vulnerabilities (KEV) catalog. EPSS is the best forward-looking signal — see the EPSS row above.

04Recommended remediation

• Patch to a fixed version listed in the vendor advisory (see references below).
• Mitigate with WAF rules, network egress filters, or feature flags where the patch is not yet available.
• Hunt historical logs for exploitation indicators — see Detection signatures below.

05Technical details

For the full vendor write-up, exploit chains, and reference implementations, see the references list in section 09.

06Detection signatures

Ask SARA in chat to draft a starting detection for this CVE in your stack of choice.

07Related CVEs

No directly-cited follow-up CVEs in the KB record for this advisory. The references list in section 09 carries the vendor cross-references.

08Timeline

• Published: 2018-01-19T14:00:00.000Z
• Last modified: 2024-09-16T22:01:51.680Z

09References

• support.f5.com — https://support.f5.com/csp/article/K20682450
• www.securitytracker.com — http://www.securitytracker.com/id/1040255