Resource exhaustion in BIG-IP ASM and BIG-IP Advanced WAF - CVE-2021-22976
Published: February 11, 2021
Vulnerability identifier: #VU50620
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2021-22976
CWE-ID: CWE-400
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.
The vulnerability exists due to application does not properly control consumption of internal resources when processing WebSocket requests with JSON payloads. A remote attacker can send a huge amount of parameters in a request, trigger resource exhaustion and perform a denial of service (DoS) attack.
Affected software
BIG-IP ASM
BIG-IP Advanced WAF
BIG-IP Advanced WAF
How to mitigate CVE-2021-22976
Install updates from vendor's website.
BIG-IP ASM - addressed in versions 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP Advanced WAF - addressed in versions 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1
BIG-IP Advanced WAF - addressed in versions 13.1.3.6, 14.1.3.1, 15.1.2, 16.0.1.1