Vulnerability Monitor

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CVE-2020-5929

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.

Security Impact Summary

This vulnerability carries a MEDIUM severity rating with a CVSS v3.1 score of 5.9, indicating it can be exploited remotely over the network but requires specific conditions to be met without requiring user interaction and does not require pre-existing privileges . The vulnerability impacts confidentiality (data exposure), for affected systems. Impacting 14 products from f5, from f5, from f5 and 11 others, organizations running these solutions should prioritize assessment and patching.

Historical Context

Reported in 2020, this vulnerability emerged during an era marked by increased sophistication in supply chain attacks, cloud infrastructure vulnerabilities, and software-as-a-service (SaaS) security challenges. Security practices during this period emphasized zero-trust architectures, container security, and API protection.

Published

2020-09-25T14:15:13.970

Last Modified

2024-11-21T05:34:50.820

Status

Modified

Source

[email protected]

Severity

CVSSv3.1: 5.9 (MEDIUM)

CVSSv2 Vector

AV:N/AC:H/Au:N/C:P/I:N/A:N

  • Access Vector: NETWORK
  • Access Complexity: HIGH
  • Authentication: NONE
  • Confidentiality Impact: PARTIAL
  • Integrity Impact: NONE
  • Availability Impact: NONE
Exploitability Score

4.9

Impact Score

2.9

Weaknesses
  • Type: Primary
    CWE-203
Affected Vendors & Products
Type Vendor Product Version/Range Vulnerable?
Application f5 big-ip_access_policy_manager < 11.6.2 Yes
Application f5 big-ip_access_policy_manager < 12.1.2 Yes
Application f5 big-ip_access_policy_manager 11.6.2 Yes
Application f5 big-ip_access_policy_manager 12.1.2 Yes
Application f5 big-ip_access_policy_manager 12.1.2 Yes
Application f5 big-ip_access_policy_manager 13.0.0 Yes
Application f5 big-ip_access_policy_manager 13.0.0 Yes
Application f5 big-ip_access_policy_manager 13.0.0 Yes
Application f5 big-ip_advanced_firewall_manager < 11.6.2 Yes
Application f5 big-ip_advanced_firewall_manager < 12.1.2 Yes
Application f5 big-ip_advanced_firewall_manager 11.6.2 Yes
Application f5 big-ip_advanced_firewall_manager 12.1.2 Yes
Application f5 big-ip_advanced_firewall_manager 12.1.2 Yes
Application f5 big-ip_advanced_firewall_manager 13.0.0 Yes
Application f5 big-ip_advanced_firewall_manager 13.0.0 Yes
Application f5 big-ip_advanced_firewall_manager 13.0.0 Yes
Application f5 big-ip_advanced_web_application_firewall < 11.6.2 Yes
Application f5 big-ip_advanced_web_application_firewall < 12.1.2 Yes
Application f5 big-ip_advanced_web_application_firewall 11.6.2 Yes
Application f5 big-ip_advanced_web_application_firewall 12.1.2 Yes
Application f5 big-ip_advanced_web_application_firewall 12.1.2 Yes
Application f5 big-ip_advanced_web_application_firewall 13.0.0 Yes
Application f5 big-ip_advanced_web_application_firewall 13.0.0 Yes
Application f5 big-ip_advanced_web_application_firewall 13.0.0 Yes
Application f5 big-ip_analytics < 11.6.2 Yes
Application f5 big-ip_analytics < 12.1.2 Yes
Application f5 big-ip_analytics 11.6.2 Yes
Application f5 big-ip_analytics 12.1.2 Yes
Application f5 big-ip_analytics 12.1.2 Yes
Application f5 big-ip_analytics 13.0.0 Yes
Application f5 big-ip_analytics 13.0.0 Yes
Application f5 big-ip_analytics 13.0.0 Yes
Application f5 big-ip_application_acceleration_manager < 11.6.2 Yes
Application f5 big-ip_application_acceleration_manager < 12.1.2 Yes
Application f5 big-ip_application_acceleration_manager 11.6.2 Yes
Application f5 big-ip_application_acceleration_manager 12.1.2 Yes
Application f5 big-ip_application_acceleration_manager 12.1.2 Yes
Application f5 big-ip_application_acceleration_manager 13.0.0 Yes
Application f5 big-ip_application_acceleration_manager 13.0.0 Yes
Application f5 big-ip_application_acceleration_manager 13.0.0 Yes
Application f5 big-ip_application_security_manager < 11.6.2 Yes
Application f5 big-ip_application_security_manager < 12.1.2 Yes
Application f5 big-ip_application_security_manager 11.6.2 Yes
Application f5 big-ip_application_security_manager 12.1.2 Yes
Application f5 big-ip_application_security_manager 12.1.2 Yes
Application f5 big-ip_application_security_manager 13.0.0 Yes
Application f5 big-ip_application_security_manager 13.0.0 Yes
Application f5 big-ip_application_security_manager 13.0.0 Yes
Application f5 big-ip_ddos_hybrid_defender < 11.6.2 Yes
Application f5 big-ip_ddos_hybrid_defender < 12.1.2 Yes
Application f5 big-ip_ddos_hybrid_defender 11.6.2 Yes
Application f5 big-ip_ddos_hybrid_defender 12.1.2 Yes
Application f5 big-ip_ddos_hybrid_defender 12.1.2 Yes
Application f5 big-ip_ddos_hybrid_defender 13.0.0 Yes
Application f5 big-ip_ddos_hybrid_defender 13.0.0 Yes
Application f5 big-ip_ddos_hybrid_defender 13.0.0 Yes
Application f5 big-ip_domain_name_system < 11.6.2 Yes
Application f5 big-ip_domain_name_system < 12.1.2 Yes
Application f5 big-ip_domain_name_system 11.6.2 Yes
Application f5 big-ip_domain_name_system 12.1.2 Yes
Application f5 big-ip_domain_name_system 12.1.2 Yes
Application f5 big-ip_domain_name_system 13.0.0 Yes
Application f5 big-ip_domain_name_system 13.0.0 Yes
Application f5 big-ip_domain_name_system 13.0.0 Yes
Application f5 big-ip_fraud_protection_service < 11.6.2 Yes
Application f5 big-ip_fraud_protection_service < 12.1.2 Yes
Application f5 big-ip_fraud_protection_service 11.6.2 Yes
Application f5 big-ip_fraud_protection_service 12.1.2 Yes
Application f5 big-ip_fraud_protection_service 12.1.2 Yes
Application f5 big-ip_fraud_protection_service 13.0.0 Yes
Application f5 big-ip_fraud_protection_service 13.0.0 Yes
Application f5 big-ip_fraud_protection_service 13.0.0 Yes
Application f5 big-ip_global_traffic_manager < 11.6.2 Yes
Application f5 big-ip_global_traffic_manager < 12.1.2 Yes
Application f5 big-ip_global_traffic_manager 11.6.2 Yes
Application f5 big-ip_global_traffic_manager 12.1.2 Yes
Application f5 big-ip_global_traffic_manager 12.1.2 Yes
Application f5 big-ip_global_traffic_manager 13.0.0 Yes
Application f5 big-ip_global_traffic_manager 13.0.0 Yes
Application f5 big-ip_global_traffic_manager 13.0.0 Yes
Application f5 big-ip_link_controller < 11.6.2 Yes
Application f5 big-ip_link_controller < 12.1.2 Yes
Application f5 big-ip_link_controller 11.6.2 Yes
Application f5 big-ip_link_controller 12.1.2 Yes
Application f5 big-ip_link_controller 12.1.2 Yes
Application f5 big-ip_link_controller 13.0.0 Yes
Application f5 big-ip_link_controller 13.0.0 Yes
Application f5 big-ip_link_controller 13.0.0 Yes
Application f5 big-ip_local_traffic_manager < 11.6.2 Yes
Application f5 big-ip_local_traffic_manager < 12.1.2 Yes
Application f5 big-ip_local_traffic_manager 11.6.2 Yes
Application f5 big-ip_local_traffic_manager 12.1.2 Yes
Application f5 big-ip_local_traffic_manager 12.1.2 Yes
Application f5 big-ip_local_traffic_manager 13.0.0 Yes
Application f5 big-ip_local_traffic_manager 13.0.0 Yes
Application f5 big-ip_local_traffic_manager 13.0.0 Yes
Application f5 big-ip_policy_enforcement_manager < 11.6.2 Yes
Application f5 big-ip_policy_enforcement_manager < 12.1.2 Yes
Application f5 big-ip_policy_enforcement_manager 11.6.2 Yes
Application f5 big-ip_policy_enforcement_manager 12.1.2 Yes
Application f5 big-ip_policy_enforcement_manager 12.1.2 Yes
Application f5 big-ip_policy_enforcement_manager 13.0.0 Yes
Application f5 big-ip_policy_enforcement_manager 13.0.0 Yes
Application f5 big-ip_policy_enforcement_manager 13.0.0 Yes
Application f5 ssl_orchestrator < 11.6.2 Yes
Application f5 ssl_orchestrator < 12.1.2 Yes
Application f5 ssl_orchestrator 11.6.2 Yes
Application f5 ssl_orchestrator 12.1.2 Yes
Application f5 ssl_orchestrator 12.1.2 Yes
Application f5 ssl_orchestrator 13.0.0 Yes
Application f5 ssl_orchestrator 13.0.0 Yes
Application f5 ssl_orchestrator 13.0.0 Yes
References

How SecUtils Interprets This CVE

SecUtils normalizes and enriches National Vulnerability Database (NVD) records by standardizing vendor and product identifiers, aggregating vulnerability metadata from both NVD and MITRE sources, and providing structured context for security teams. For f5's affected products, we extract Common Platform Enumeration (CPE) data, Common Weakness Enumeration (CWE) classifications, CVSS severity metrics, and reference data to enable rapid vulnerability prioritization and asset correlation. This record contains no exploit code, proof-of-concept instructions, or attack methodologies—only defensive intelligence necessary for patch management, risk assessment, and security operations.