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CVE-2017-6168· NVD / CVE Program· CNA f5

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)

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.

HighCVSS 7.4 · v3.0—Weaponized Fix available
Published
Nov 17, 2017
Updated
Jun 16, 2026
EPSS
19.6% · 97th percentile
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Report tools

JSON

Action score

35

Monitor

Low priority for now.

CVSS
29 / 40 · 7.4 / 10
CISA KEV
0 / 30 · Not listed
EPSS
6 / 30 · 19.6%

Affected systems

VendorProduct
f5big-ip ltm
f5big-ip application acceleration manager
f5big-ip afm
f5big-ip analytics
f5big-ip apm
f5big-ip asm
f5big-ip link controller
f5big-ip pem
f5websafe

Affected versions

NVD version ranges (for catalog products). Add the product to your stack with a version and matching uses these.

  • f5 big-ip afm11.6.0 and later · up to 11.6.2 inclusive
  • f5 big-ip afm12.0.0 and later · up to 12.1.2 inclusive
  • f5 big-ip afm13.0.0
  • f5 big-ip analytics12.0.0 and later · up to 12.1.2 inclusive
  • f5 big-ip analytics11.6.0 and later · up to 11.6.2 inclusive
  • f5 big-ip analytics13.0.0
  • f5 big-ip apm12.0.0 and later · up to 12.1.2 inclusive
  • f5 big-ip apm11.6.0 and later · up to 11.6.2 inclusive
  • f5 big-ip apm13.0.0
  • f5 big-ip application acceleration manager12.0.0 and later · up to 12.1.2 inclusive
  • f5 big-ip application acceleration manager11.6.0 and later · up to 11.6.2 inclusive
  • f5 big-ip application acceleration manager13.0.0
  • f5 big-ip asm11.6.0 and later · up to 11.6.2 inclusive
  • f5 big-ip asm12.0.0 and later · up to 12.1.2 inclusive
  • f5 big-ip asm13.0.0
  • f5 big-ip link controller12.0.0 and later · up to 12.1.2 inclusive
  • f5 big-ip link controller11.6.0 and later · up to 11.6.2 inclusive
  • f5 big-ip link controller13.0.0
  • f5 big-ip ltm11.6.0 and later · up to 11.6.2 inclusive
  • f5 big-ip ltm12.0.0 and later · up to 12.1.2 inclusive

Remediation

Which version to upgrade to

Fix versions compiled from the vendor, package registries and Microsoft. Verify the vendor's note before upgrading.

Product / packageFixed versionSource
n/a n/a11.6.2 · descriptionVendor (CNA)

Exploit status

Weaponized

A ready exploit tool or active in-the-wild use is known for this vulnerability. This should be your top priority.

Evidence

  • Metasploit module ×1

Noroxi does not host or link to exploit code. Metasploit module names and Nuclei template ids are shown (names, not code); Exploit-DB entries and PoC repositories are given as counts only.

Public exploit evidence
SourceKindDate
Metasploit moduleauxiliary/scanner/ssl/bleichenbacher_oracleScanner for Bleichenbacher Oracle in RSA PKCS #1 v1.5auxiliary2009-06-17

Research context

For pentesters and researchers: attack profile, score disagreement, timeline, patch commits, credits, variant and chain candidates, bug bounty scope. All derived from existing data; no exploit code.

Timeline

From publication to today: proof of concept, Metasploit module, CISA KEV and fix record. Dates are as reported by the sources.

  1. Metasploit-3076 d
  2. Published
  3. TodaySep 30, 2026+3239 d
EPSS, last 120 days

FIRST EPSS daily score; only changes of 0.01 or more are recorded (step chart).

Patch and commit links

Commit, PR and diff links among the references. A starting point for patch-diffing and variant hunting; fixes, not exploits.

No commit or PR link among the references.

Credits

All researchers

Finders, reporters and analysts named in the CNA record. Click a name for that researcher’s other records.

No credits in the CNA record.

Variant candidates

Same product, same weakness class, within 18 months. If the patch missed the root cause, the sibling bug is here.

No nightly-computed relations.

Chain candidates

An authentication bypass and a privilege-requiring bug in the same product, published close together: combined they may become an unauthenticated path.

—

Bug bounty scope

No known public program.

Source: bounty-targets-data (public HackerOne, Bugcrowd, Intigriti, YesWeHack listings).

Technical details

Attack conditions

  • Anyone who can reach it over the internet can trigger it.
  • No account or password is required.
  • No user action is required.
  • Special conditions such as timing or configuration are required.

If successful

Confidentiality
high · data can be read
Integrity
high · data or configuration can be modified
Availability
none
Attack vector
Network
Attack complexity
High
Privileges required
None
User interaction
None
Scope
Unchanged
Confidentiality impact
High
Integrity impact
High
Availability impact
None

Weakness class (CWE)

CWE-203 · Observable Discrepancy

CVSS vector

CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

nvd-primary

Attack context

MITRE CAPEC attack patterns and ATT&CK techniques for this weakness class (CWE). A starting point for detection rules and threat hunting.

ATT&CK techniques

—

Noroxi analysis

No Noroxi analysis for this record yet

We don't hand-write analysis for all 385,000+ vulnerabilities; that wouldn't be honest. For notable, high-impact vulnerabilities our team writes the mechanism, detection and remediation steps.

We use this product, ask for help

Change log

  1. Fix✗ → ✓

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References

Vendor advisories and official records. Exploit/PoC links are deliberately left out.

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