Vulnerability in F5 Big-Ip Access Policy Manager
CVE-2021-22981
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.
EPSS: 0.005 (42.0th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 4.8 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N.
Affected products
- 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
- F5 Big-ip_application_security_manager
- F5 Big-ip_ddos_hybrid_defender
- F5 Big-ip_domain_name_system
- F5 Big-ip_fraud_protection_service
- F5 Big-ip_global_traffic_manager
References
- f5sirt@f5.com (x_refsource_MISC, Vendor Advisory)
Frequently asked questions
- What is CVE-2021-22981?
- CVE-2021-22981 is a medium-severity vulnerability in F5 Big-Ip Access Policy Manager. CVSS score: 4.8/10. Published 2021-02-12.
- How severe is CVE-2021-22981?
- Medium severity. CVSS v3 base score is 4.8 out of 10.