CVE-2020-5929: Medium severity f5 access policy manager vulnerability
Published Sep 25, 2020
·Updated
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 Software
112 affected components
F5 BIG-IP Access Policy Manager>=11.6.1<11.6.2
F5 BIG-IP Access Policy Manager>=12.1.0<12.1.2
F5 BIG-IP Access Policy Manager=11.6.2
F5 BIG-IP Access Policy Manager=12.1.2
F5 BIG-IP Access Policy Manager=12.1.2-hotfix1
F5 BIG-IP Access Policy Manager=13.0.0
F5 BIG-IP Access Policy Manager=13.0.0-hotfix1
F5 BIG-IP Access Policy Manager=13.0.0-hotfix2
F5 BIG-IP Advanced Firewall Manager>=11.6.1<11.6.2
F5 BIG-IP Advanced Firewall Manager>=12.1.0<12.1.2
F5 BIG-IP Advanced Firewall Manager=11.6.2
F5 BIG-IP Advanced Firewall Manager=12.1.2
F5 BIG-IP Advanced Firewall Manager=12.1.2-hotfix1
F5 BIG-IP Advanced Firewall Manager=13.0.0
F5 BIG-IP Advanced Firewall Manager=13.0.0-hotfix1
F5 BIG-IP Advanced Firewall Manager=13.0.0-hotfix2
F5 Big-ip Advanced Web Application Firewall>=11.6.1<11.6.2
F5 Big-ip Advanced Web Application Firewall>=12.1.0<12.1.2
F5 Big-ip Advanced Web Application Firewall=11.6.2
F5 Big-ip Advanced Web Application Firewall=12.1.2
F5 Big-ip Advanced Web Application Firewall=12.1.2-hotfix1
F5 Big-ip Advanced Web Application Firewall=13.0.0
F5 Big-ip Advanced Web Application Firewall=13.0.0-hotfix1
F5 Big-ip Advanced Web Application Firewall=13.0.0-hotfix2
F5 BIG-IP Analytics>=11.6.1<11.6.2
F5 BIG-IP Analytics>=12.1.0<12.1.2
F5 BIG-IP Analytics=11.6.2
F5 BIG-IP Analytics=12.1.2
F5 BIG-IP Analytics=12.1.2-hotfix1
F5 BIG-IP Analytics=13.0.0
F5 BIG-IP Analytics=13.0.0-hotfix1
F5 BIG-IP Analytics=13.0.0-hotfix2
F5 Big-ip Application Acceleration Manager>=11.6.1<11.6.2
F5 Big-ip Application Acceleration Manager>=12.1.0<12.1.2
F5 Big-ip Application Acceleration Manager=11.6.2
F5 Big-ip Application Acceleration Manager=12.1.2
F5 Big-ip Application Acceleration Manager=12.1.2-hotfix1
F5 Big-ip Application Acceleration Manager=13.0.0
F5 Big-ip Application Acceleration Manager=13.0.0-hotfix1
F5 Big-ip Application Acceleration Manager=13.0.0-hotfix2
F5 BIG-IP Application Security Manager>=11.6.1<11.6.2
F5 BIG-IP Application Security Manager>=12.1.0<12.1.2
F5 BIG-IP Application Security Manager=11.6.2
F5 BIG-IP Application Security Manager=12.1.2
F5 BIG-IP Application Security Manager=12.1.2-hotfix1
F5 BIG-IP Application Security Manager=13.0.0
F5 BIG-IP Application Security Manager=13.0.0-hotfix1
F5 BIG-IP Application Security Manager=13.0.0-hotfix2
F5 Big-ip Ddos Hybrid Defender>=11.6.1<11.6.2
F5 Big-ip Ddos Hybrid Defender>=12.1.0<12.1.2
F5 Big-ip Ddos Hybrid Defender=11.6.2
F5 Big-ip Ddos Hybrid Defender=12.1.2
F5 Big-ip Ddos Hybrid Defender=12.1.2-hotfix1
F5 Big-ip Ddos Hybrid Defender=13.0.0
F5 Big-ip Ddos Hybrid Defender=13.0.0-hotfix1
F5 Big-ip Ddos Hybrid Defender=13.0.0-hotfix2
F5 Big-ip Domain Name System>=11.6.1<11.6.2
F5 Big-ip Domain Name System>=12.1.0<12.1.2
F5 Big-ip Domain Name System=11.6.2
F5 Big-ip Domain Name System=12.1.2
F5 Big-ip Domain Name System=12.1.2-hotfix1
F5 Big-ip Domain Name System=13.0.0
F5 Big-ip Domain Name System=13.0.0-hotfix1
F5 Big-ip Domain Name System=13.0.0-hotfix2
F5 Big-ip Fraud Protection Service>=11.6.1<11.6.2
F5 Big-ip Fraud Protection Service>=12.1.0<12.1.2
F5 Big-ip Fraud Protection Service=11.6.2
F5 Big-ip Fraud Protection Service=12.1.2
F5 Big-ip Fraud Protection Service=12.1.2-hotfix1
F5 Big-ip Fraud Protection Service=13.0.0
F5 Big-ip Fraud Protection Service=13.0.0-hotfix1
F5 Big-ip Fraud Protection Service=13.0.0-hotfix2
F5 Big-ip Global Traffic Manager>=11.6.1<11.6.2
F5 Big-ip Global Traffic Manager>=12.1.0<12.1.2
F5 Big-ip Global Traffic Manager=11.6.2
F5 Big-ip Global Traffic Manager=12.1.2
F5 Big-ip Global Traffic Manager=12.1.2-hotfix1
F5 Big-ip Global Traffic Manager=13.0.0
F5 Big-ip Global Traffic Manager=13.0.0-hotfix1
F5 Big-ip Global Traffic Manager=13.0.0-hotfix2
F5 Big-ip Link Controller>=11.6.1<11.6.2
F5 Big-ip Link Controller>=12.1.0<12.1.2
F5 Big-ip Link Controller=11.6.2
F5 Big-ip Link Controller=12.1.2
F5 Big-ip Link Controller=12.1.2-hotfix1
F5 Big-ip Link Controller=13.0.0
F5 Big-ip Link Controller=13.0.0-hotfix1
F5 Big-ip Link Controller=13.0.0-hotfix2
F5 Big-ip Local Traffic Manager>=11.6.1<11.6.2
F5 Big-ip Local Traffic Manager>=12.1.0<12.1.2
F5 Big-ip Local Traffic Manager=11.6.2
F5 Big-ip Local Traffic Manager=12.1.2
F5 Big-ip Local Traffic Manager=12.1.2-hotfix1
F5 Big-ip Local Traffic Manager=13.0.0
F5 Big-ip Local Traffic Manager=13.0.0-hotfix1
F5 Big-ip Local Traffic Manager=13.0.0-hotfix2
F5 Big-ip Policy Enforcement Manager>=11.6.1<11.6.2
F5 Big-ip Policy Enforcement Manager>=12.1.0<12.1.2
F5 Big-ip Policy Enforcement Manager=11.6.2
F5 Big-ip Policy Enforcement Manager=12.1.2
F5 Big-ip Policy Enforcement Manager=12.1.2-hotfix1
F5 Big-ip Policy Enforcement Manager=13.0.0
F5 Big-ip Policy Enforcement Manager=13.0.0-hotfix1
F5 Big-ip Policy Enforcement Manager=13.0.0-hotfix2
F5 SSL Orchestrator>=11.6.1<11.6.2
F5 SSL Orchestrator>=12.1.0<12.1.2
F5 SSL Orchestrator=11.6.2
F5 SSL Orchestrator=12.1.2
F5 SSL Orchestrator=12.1.2-hotfix1
F5 SSL Orchestrator=13.0.0
F5 SSL Orchestrator=13.0.0-hotfix1
F5 SSL Orchestrator=13.0.0-hotfix2
Event History
Sep 25, 2020
CVE Published
via MITRE·01:22 PM
Data Sourced
via MITRE·01:22 PM
DescriptionWeakness
Frequently Asked Questions
1
What is the severity of CVE-2020-5929?
CVE-2020-5929 has a medium severity rating due to its potential impact on secure communications.
2
How do I fix CVE-2020-5929?
To fix CVE-2020-5929, update the affected F5 BIG-IP software to a non-vulnerable version as specified in the vendor's security advisory.
3
Which F5 BIG-IP versions are affected by CVE-2020-5929?
Affected versions of F5 BIG-IP include 11.6.1 to 11.6.2, 12.1.0 to 12.1.2, and 13.0.0 to 13.0.0 HF2.
4
What types of attacks does CVE-2020-5929 expose systems to?
CVE-2020-5929 can expose systems to potential man-in-the-middle attacks due to weakness in key exchange configurations.
5
Is there a workaround for CVE-2020-5929?
A potential workaround is to disable the use of Anonymous Diffie-Hellman and Ephemeral Diffie-Hellman key exchanges until a patch is applied.