CVE-2017-6142 — 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

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MEDIUM

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

Published Jan 19, 2018

4.8

MEDIUM

CVSS 3.0

EPSS 0.40%

Description

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.

Affected products

Vendor F5 Networks, Inc. Product Big-IP Afm Default
n/a
- Version
  11.6.0 - 11.6.2
  Status
  affected
  Constraints
  -
- Version
  12.1.0 - 12.1.2
  Status
  affected
  Constraints
  -
- Version
  13.0.0
  Status
  affected
  Constraints
  -

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor

Product

Default status

Versions

F5 Networks, Inc.

Big-IP Afm

n/a

Version	Status	Constraints
11.6.0 - 11.6.2	affected	-
12.1.0 - 12.1.2	affected	-
13.0.0	affected	-

Remediation

No remediation recorded yet.

Metrics

0.40% 0.00401

Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.

EPSS probability 0.00401

Score over time

2021–2026

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Percentile over time

EPSS v1
EPSS v5
EPSS v2
EPSS v3

Table of values (10 key points)

Flat stretches are collapsed; showing up to 120 newest points.

Date	Score	Percentile	Model
Oct 1, 2026	0.40% (0.00401)	31.96th	v5 (v2026.06.15)
Sep 20, 2026	0.40% (0.00401)	34.18th	v5 (v2026.06.15)
Jul 20, 2024	0.07% (0.00073)	32.09th	v3 (v2023.03.01)
Jun 26, 2024	0.07% (0.00073)	31.82th	v3 (v2023.03.01)
Sep 3, 2023	0.07% (0.00072)	29.80th	v3 (v2023.03.01)
Mar 7, 2023	0.07% (0.00067)	27.46th	v3 (v2023.03.01)
Mar 6, 2023	0.89% (0.00885)	27.89th	v2 (v2022.01.01)
Feb 4, 2022	0.89% (0.00885)	10.50th	v2 (v2022.01.01)
Feb 3, 2022	0.62% (0.00624)	17.80th	v5 (v2026.06.15)
Apr 14, 2021	0.62% (0.00624)	0.00th	v1

Weaknesses (1)

CWE-295

Improper Certificate Validation

References (2)

http://www.securitytracker.com/id/1040255
vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://support.f5.com/csp/article/K20682450
x_refsource_CONFIRMVendor Advisory

Link	Providers	Tags
http://www.securitytracker.com/id/1040255		vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
https://support.f5.com/csp/article/K20682450		x_refsource_CONFIRMVendor Advisory