CVE-2017-6168

Name: CVE-2017-6168
Creator: NVD / NIST
Published: 2017-11-17T19:29:00.217+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

UnknownEPSS 21.55%

Last modified Jun 17, 2026

CVE-2017-6168 is a vulnerability of currently unknown severity. On BIG-IP versions 11.6.0-11.6.2 (fixed in 11.6.2 HF1), 12.0.0-12.1.2 HF1 (fixed in 12.1.2 HF2), or 13.0.0-13.0.0 HF2 (fixed in 13.0.0 HF3) a virtual server configured with a Client SSL profile may be vulnerable to an Adaptive Chosen Ciphertext attack (AKA Bleichenbacher attack) against RSA, which when exploited, may result in plaintext recovery of encrypted messages and/or a Man-in-the-middle (MiTM) attack, despite the attacker not having gained access to the server's private key itself, aka a ROBOT attack.. EPSS estimates a 21.55% chance of exploitation in the next 30 days.

Description

On BIG-IP versions 11.6.0-11.6.2 (fixed in 11.6.2 HF1), 12.0.0-12.1.2 HF1 (fixed in 12.1.2 HF2), or 13.0.0-13.0.0 HF2 (fixed in 13.0.0 HF3) a virtual server configured with a Client SSL profile may be vulnerable to an Adaptive Chosen Ciphertext attack (AKA Bleichenbacher attack) against RSA, which when exploited, may result in plaintext recovery of encrypted messages and/or a Man-in-the-middle (MiTM) attack, despite the attacker not having gained access to the server's private key itself, aka a ROBOT attack.

Metrics

EPSS Probability

21.55%

97.3th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-203

Affected Software

Vendor	Product	Versions
F5	Big-Ip Ltm	>= 11.6.0, <= 11.6.2
F5	Big-Ip Ltm	>= 12.0.0, <= 12.1.2
F5	Big-Ip Ltm	13.0.0
F5	Big-Ip Application Acceleration Manager	>= 11.6.0, <= 11.6.2
F5	Big-Ip Application Acceleration Manager	>= 12.0.0, <= 12.1.2
F5	Big-Ip Application Acceleration Manager	13.0.0
F5	Big-Ip Afm	>= 11.6.0, <= 11.6.2
F5	Big-Ip Afm	>= 12.0.0, <= 12.1.2
F5	Big-Ip Afm	13.0.0
F5	Big-Ip Analytics	>= 11.6.0, <= 11.6.2
F5	Big-Ip Analytics	>= 12.0.0, <= 12.1.2
F5	Big-Ip Analytics	13.0.0
F5	Big-Ip Apm	>= 11.6.0, <= 11.6.2
F5	Big-Ip Apm	>= 12.0.0, <= 12.1.2
F5	Big-Ip Apm	13.0.0
F5	Big-Ip Asm	>= 11.6.0, <= 11.6.2
F5	Big-Ip Asm	>= 12.0.0, <= 12.1.2
F5	Big-Ip Asm	13.0.0
F5	Big-Ip Link Controller	>= 11.6.0, <= 11.6.2
F5	Big-Ip Link Controller	>= 12.0.0, <= 12.1.2
F5	Big-Ip Link Controller	13.0.0
F5	Big-Ip Pem	>= 11.6.0, <= 11.6.2
F5	Big-Ip Pem	>= 12.0.0, <= 12.1.2
F5	Big-Ip Pem	13.0.0
F5	Websafe	>= 12.0.0, <= 12.1.2
F5	Websafe	11.6.2
F5	Websafe	13.0.0

References

http://www.securityfocus.com/bid/101901Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039839Third Party Advisory, VDB Entry
https://robotattack.org/Technical Description, Third Party Advisory
https://support.f5.com/csp/article/K21905460Issue Tracking, Mitigation, Vendor Advisory
https://www.kb.cert.org/vuls/id/144389Third Party Advisory, US Government Resource
http://www.securityfocus.com/bid/101901Third Party Advisory, VDB Entry
http://www.securitytracker.com/id/1039839Third Party Advisory, VDB Entry
https://robotattack.org/Technical Description, Third Party Advisory
https://support.f5.com/csp/article/K21905460Issue Tracking, Mitigation, Vendor Advisory
https://www.kb.cert.org/vuls/id/144389Third Party Advisory, US Government Resource

Timeline

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

Frequently Asked Questions

What is CVE-2017-6168?

How severe is CVE-2017-6168?

Severity scoring for CVE-2017-6168 is pending analysis. The EPSS model estimates a 21.55% probability of exploitation in the next 30 days.

How do I fix CVE-2017-6168?

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-2017-6168?

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

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Source: NVD / NIST