CVE-2021-23009

HIGH

BIG-IP <16.0.1.1 & 15.1.3 - DoS

Title source: llm
STIX 2.1

Description

On BIG-IP version 16.0.x before 16.0.1.1 and 15.1.x before 15.1.3, malformed HTTP/2 requests may cause an infinite loop which causes a Denial of Service for Data Plane traffic. TMM takes the configured HA action when the TMM process is aborted. There is no control plane exposure, this is a data plane issue only. Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.

References (1)

Core 1
Core References
Vendor Advisory x_refsource_misc
https://support.f5.com/csp/article/K90603426

Scores

CVSS v3 7.5
EPSS 0.0065
EPSS Percentile 70.8%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-835
Status published
Products (14)
f5/big-ip_access_policy_manager 15.1.0 - 15.1.3
f5/big-ip_advanced_firewall_manager 15.1.0 - 15.1.3
f5/big-ip_advanced_web_application_firewall 15.1.0 - 15.1.3
f5/big-ip_analytics 15.1.0 - 15.1.3
f5/big-ip_application_acceleration_manager 15.1.0 - 15.1.3
f5/big-ip_application_security_manager 15.1.0 - 15.1.3
f5/big-ip_ddos_hybrid_defender 15.1.0 - 15.1.3
f5/big-ip_domain_name_system 15.1.0 - 15.1.3
f5/big-ip_fraud_protection_service 15.1.0 - 15.1.3
f5/big-ip_global_traffic_manager 15.1.0 - 15.1.3
... and 4 more
Published May 10, 2021
Tracked Since Feb 18, 2026