On BIG-IP versions 16.0.x before 16.0.1.1, 15.1.x before 15.1.2.1, 14.1.x before 14.1.4, 13.1.x before 13.1.3.6, and 12.1.x before 12.1.5.3, undisclosed requests to a virtual server may be incorrectly handled by the Traffic Management Microkernel (TMM) URI normalization, which may trigger a buffer overflow, resulting in a DoS attack. In certain situations, it may theoretically allow bypass of URL based access control or remote code execution (RCE). Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
References
| Link | Resource |
|---|---|
| https://support.f5.com/csp/article/K56715231 | Vendor Advisory |
| https://support.f5.com/csp/article/K56715231 | Vendor Advisory |
| https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2021-22991 |
Configurations
Configuration 1 (hide)
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History
22 Oct 2025, 00:17
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21 Oct 2025, 20:18
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21 Oct 2025, 19:18
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Information
Published : 2021-03-31 18:15
Updated : 2025-10-22 00:17
NVD link : CVE-2021-22991
Mitre link : CVE-2021-22991
CVE.ORG link : CVE-2021-22991
JSON object : View
Products Affected
f5
- big-ip_access_policy_manager
- ssl_orchestrator
- big-ip_advanced_web_application_firewall
- big-ip_advanced_firewall_manager
- big-ip_ddos_hybrid_defender
- big-ip_local_traffic_manager
- big-ip_policy_enforcement_manager
- big-ip_application_acceleration_manager
- big-ip_domain_name_system
- big-ip_global_traffic_manager
- big-ip_analytics
- big-ip_application_security_manager
- big-ip_fraud_protection_service
- big-ip_link_controller
CWE
CWE-119
Improper Restriction of Operations within the Bounds of a Memory Buffer