Vulnerability 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.
CVSS Score
MEDIUM
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| F5 | Big-Ip Access Policy Manager | >= 11.6.1, < 11.6.2 |
| F5 | Big-Ip Advanced Firewall Manager | >= 11.6.1, < 11.6.2 |
| F5 | Big-Ip Advanced Web Application Firewall | >= 11.6.1, < 11.6.2 |
| F5 | Big-Ip Analytics | >= 11.6.1, < 11.6.2 |
| F5 | Big-Ip Application Acceleration Manager | >= 11.6.1, < 11.6.2 |
| F5 | Big-Ip Application Security Manager | >= 11.6.1, < 11.6.2 |
| F5 | Big-Ip Ddos Hybrid Defender | >= 11.6.1, < 11.6.2 |
| F5 | Big-Ip Domain Name System | >= 11.6.1, < 11.6.2 |
| F5 | Big-Ip Fraud Protection Service | >= 11.6.1, < 11.6.2 |
| F5 | Big-Ip Global Traffic Manager | >= 11.6.1, < 11.6.2 |
| F5 | Big-Ip Link Controller | >= 11.6.1, < 11.6.2 |
| F5 | Big-Ip Local Traffic Manager | >= 11.6.1, < 11.6.2 |
| F5 | Big-Ip Policy Enforcement Manager | >= 11.6.1, < 11.6.2 |
| F5 | Ssl Orchestrator | >= 11.6.1, < 11.6.2 |
Related Weaknesses (CWE)
References
- https://support.f5.com/csp/article/K91158923Vendor Advisory
- https://support.f5.com/csp/article/K91158923Vendor Advisory
FAQ
What is CVE-2020-5929?
CVE-2020-5929 is a vulnerability with a CVSS score of 5.9 (MEDIUM). 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 usi...
How severe is CVE-2020-5929?
CVE-2020-5929 has been rated MEDIUM with a CVSS base score of 5.9/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-5929?
Check the references section above for vendor advisories and patch information. Affected products include: F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Advanced Web Application Firewall, F5 Big-Ip Analytics, F5 Big-Ip Application Acceleration Manager.