CVE-2020-27718
HIGHF5 BIG-IP ASM/Advanced WAF DoS via JSON Payload Parameter Processing
Title source: llmDescription
When a BIG-IP ASM or Advanced WAF system running version 16.0.0-16.0.0.1, 15.1.0-15.1.0.5, 14.1.0-14.1.3, 13.1.0-13.1.3.4, 12.1.0-12.1.5.2, or 11.6.1-11.6.5.2 processes requests with JSON payload, an unusually large number of parameters can cause excessive CPU usage in the BIG-IP ASM bd process.
References (1)
Core 1
Core References
Vendor Advisory x_refsource_misc
https://support.f5.com/csp/article/K58102101
Scores
CVSS v3
7.5
EPSS
0.0065
EPSS Percentile
71.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Details
Status
published
Products (2)
f5/big-ip_advanced_web_application_firewall
11.6.1 - 11.6.5
f5/big-ip_application_security_manager
11.6.1 - 11.6.5
Published
Dec 24, 2020
Tracked Since
Feb 18, 2026