CVE-2021-22981
Medium
Description
On all versions of BIG-IP 12.1.x and 11.6.x, the original TLS protocol includes a weakness in the master secret negotiation that is mitigated by the Extended Master Secret (EMS) extension defined in RFC 7627. TLS connections that do not use EMS are vulnerable to man-in-the-middle attacks during renegotiation. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
SeverityMedium
CVSS4.8
Exploit probability—
Product
F5 Big-ip Access Policy Manager
PublishedFeb 12, 2021
First seenFeb 12, 2021
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| f5 big-ip_access_policy_manager | 11.6.1 ≤ v ≤ 11.6.5, 12.1.0 ≤ v ≤ 12.1.5 | — |
| f5 big-ip_advanced_firewall_manager | 11.6.1 ≤ v ≤ 11.6.5, 12.1.0 ≤ v ≤ 12.1.5 | — |
| f5 big-ip_advanced_web_application_firewall | 11.6.1 ≤ v ≤ 11.6.5, 12.1.0 ≤ v ≤ 12.1.5 | — |
| f5 big-ip_analytics | 11.6.1 ≤ v ≤ 11.6.5, 12.1.0 ≤ v ≤ 12.1.5 | — |
| f5 big-ip_application_acceleration_manager | 11.6.1 ≤ v ≤ 11.6.5, 12.1.0 ≤ v ≤ 12.1.5 | — |
| f5 big-ip_application_security_manager | 11.6.1 ≤ v ≤ 11.6.5, 12.1.0 ≤ v ≤ 12.1.5 | — |
| f5 big-ip_ddos_hybrid_defender | 11.6.1 ≤ v ≤ 11.6.5, 12.1.0 ≤ v ≤ 12.1.5 | — |
| f5 big-ip_domain_name_system | 11.6.1 ≤ v ≤ 11.6.5, 12.1.0 ≤ v ≤ 12.1.5 | — |
| f5 big-ip_fraud_protection_service | 11.6.1 ≤ v ≤ 11.6.5, 12.1.0 ≤ v ≤ 12.1.5 | — |
| f5 big-ip_global_traffic_manager | 11.6.1 ≤ v ≤ 11.6.5, 12.1.0 ≤ v ≤ 12.1.5 | — |
| f5 big-ip_link_controller | 11.6.1 ≤ v ≤ 11.6.5, 12.1.0 ≤ v ≤ 12.1.5 | — |
| f5 big-ip_local_traffic_manager | 11.6.1 ≤ v ≤ 11.6.5, 12.1.0 ≤ v ≤ 12.1.5 | — |
| f5 big-ip_policy_enforcement_manager | 11.6.1 ≤ v ≤ 11.6.5, 12.1.0 ≤ v ≤ 12.1.5 | — |
| f5 big-ip_ssl_orchestrator | 11.6.1 ≤ v ≤ 11.6.5, 12.1.0 ≤ v ≤ 12.1.5 | — |
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