© 2026 vulntracker.io

CVE-2020-5929

MEDIUM

5.9

CVSS Score

Published: September 25, 2020 at 01:22 PM UTC

Updated: June 17, 2026 at 03:22 AM UTC

15 products affected across 1 vendorBig IP Access Policy ManagerBig IP Application Security ManagerBig IP Advanced Firewall Manager

Using BIG-IP by N/A?

Get instant alerts when new vulnerabilities affect BIG-IP - before attackers find them.

Real-time alertsTrack your software stackFree plan available

Start Free Sign In

Severity

MEDIUM5.9

Exploit prediction

EPSS 1%

Description

In versions 13.0.0-13.0.0 HF2, 12.1.0-12.1.2 HF1, and 11.6.1-11.6.2, BIG-IP platforms with Cavium Nitrox SSL hardware acceleration cards, a Virtual Server configured with a Client SSL profile, and using Anonymous (ADH) or Ephemeral (DHE) Diffie-Hellman key exchange and Single DH use option not enabled in the options list may be vulnerable to crafted SSL/TLS Handshakes that may result with a PMS (Pre-Master Secret) that starts in a 0 byte and may lead to a recovery of plaintext messages as BIG-IP TLS/SSL ADH/DHE sends different error messages acting as an oracle. Similar error messages when PMS starts with 0 byte coupled with very precise timing measurement observation may also expose this vulnerability.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Big IP Access Policy Manager · F5

95%

11.6.1 ≤ v < 11.6.212.1.0 ≤ v < 12.1.211.6.2 12.1.2 12.1.2 hotfix1 13.0.0 13.0.0 hotfix1 13.0.0 hotfix2

Affected range stops below 11.6.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.1.2, so it looks safe — our inference, not a vendor statement

Big IP Advanced Firewall Manager · F5

95%

11.6.1 ≤ v < 11.6.212.1.0 ≤ v < 12.1.211.6.2 12.1.2 12.1.2 hotfix1 13.0.0 13.0.0 hotfix1 13.0.0 hotfix2

Affected range stops below 11.6.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.1.2, so it looks safe — our inference, not a vendor statement

Big IP Advanced Web Application Firewall · F5

95%

11.6.1 ≤ v < 11.6.212.1.0 ≤ v < 12.1.211.6.2 12.1.2 12.1.2 hotfix1 13.0.0 13.0.0 hotfix1 13.0.0 hotfix2

Affected range stops below 11.6.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.1.2, so it looks safe — our inference, not a vendor statement

Big IP Analytics · F5

95%

11.6.1 ≤ v < 11.6.212.1.0 ≤ v < 12.1.211.6.2 12.1.2 12.1.2 hotfix1 13.0.0 13.0.0 hotfix1 13.0.0 hotfix2

Affected range stops below 11.6.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.1.2, so it looks safe — our inference, not a vendor statement

Big IP Application Acceleration Manager · F5

95%

11.6.1 ≤ v < 11.6.212.1.0 ≤ v < 12.1.211.6.2 12.1.2 12.1.2 hotfix1 13.0.0 13.0.0 hotfix1 13.0.0 hotfix2

Affected range stops below 11.6.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.1.2, so it looks safe — our inference, not a vendor statement

Big IP Application Security Manager · F5

95%

11.6.1 ≤ v < 11.6.212.1.0 ≤ v < 12.1.211.6.2 12.1.2 12.1.2 hotfix1 13.0.0 13.0.0 hotfix1 13.0.0 hotfix2

Affected range stops below 11.6.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.1.2, so it looks safe — our inference, not a vendor statement

Big IP Ddos Hybrid Defender · F5

95%

11.6.1 ≤ v < 11.6.212.1.0 ≤ v < 12.1.211.6.2 12.1.2 12.1.2 hotfix1 13.0.0 13.0.0 hotfix1 13.0.0 hotfix2

Affected range stops below 11.6.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.1.2, so it looks safe — our inference, not a vendor statement

Big IP Domain Name System · F5

95%

11.6.1 ≤ v < 11.6.212.1.0 ≤ v < 12.1.211.6.2 12.1.2 12.1.2 hotfix1 13.0.0 13.0.0 hotfix1 13.0.0 hotfix2

Affected range stops below 11.6.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.1.2, so it looks safe — our inference, not a vendor statement

Big IP Fraud Protection Service · F5

95%

11.6.1 ≤ v < 11.6.212.1.0 ≤ v < 12.1.211.6.2 12.1.2 12.1.2 hotfix1 13.0.0 13.0.0 hotfix1 13.0.0 hotfix2

Affected range stops below 11.6.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.1.2, so it looks safe — our inference, not a vendor statement

Big IP Global Traffic Manager · F5

95%

11.6.1 ≤ v < 11.6.212.1.0 ≤ v < 12.1.211.6.2 12.1.2 12.1.2 hotfix1 13.0.0 13.0.0 hotfix1 13.0.0 hotfix2

Affected range stops below 11.6.2, so it looks safe — our inference, not a vendor statement

Affected range stops below 12.1.2, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

https://support.f5.com/csp/article/K91158923

References (1)

x_refsource_MISCVendor Advisory

Source: [email protected]

https://support.f5.com/csp/article/K91158923

CVSS

5.9MEDIUM[email protected]

Attack Vector: NETWORK
Complexity: HIGH
Privileges: NONE
User Interaction: NONE
Scope: UNCHANGED
Confidentiality: HIGH
Integrity: NONE
Availability: NONE

Vector?

Quick Info

StatusMODIFIED

CWE

CWE-203

Get alerted

Stop reading CVE feeds looking for your own stack

Track the products you run and VulnTracker tells you when a new CVE affects them — with what is known about fixing it, and nothing about the rest.

Create account Sign in

Free plan, no card