High severity · published Feb 12, 2021
CVE-2021-22976
On BIG-IP Advanced WAF and ASM version 16.0.x before 16.0.1.1, 15.1.x before 15.1.2, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.6, and all 12.1.x versions, when the BIG-IP ASM…
7.5
CVSS
1%
EPSS
No
On KEV
Description
On BIG-IP Advanced WAF and ASM version 16.0.x before 16.0.1.1, 15.1.x before 15.1.2, 14.1.x before 14.1.3.1, 13.1.x before 13.1.3.6, and all 12.1.x versions, when the BIG-IP ASM system processes WebSocket requests with JSON payloads, an unusually large number of parameters can cause excessive CPU usage in the BIG-IP ASM bd process. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
High
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)1.0% · higher than 62% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
BA
Big-ip Advanced Web Application Firewall · F5
12.1.0 through 12.1.5; 13.1.0 before 13.1.3.6; 14.1.0 before 14.1.3.1; 15.1.0 before 15.1.2; 16.0.0 before 16.0.1.1 · source: NVD
BA
Big-ip Application Security Manager · F5
12.1.0 through 12.1.5; 13.1.0 before 13.1.3.6; 14.1.0 before 14.1.3.1; 15.1.0 before 15.1.2; 16.0.0 before 16.0.1.1 · source: NVD
Affected product
BA
Big-ip Advanced Web Application Firewall
F5
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2021-22976
CVE.org
https://www.cve.org/CVERecord?id=CVE-2021-22976
Vendor Advisory
https://support.f5.com/csp/article/K88230177
More from Big-ip Advanced Web Application Firewall
9.8
CVE-2023-46747
BIG-IP Configuration utility unauthenticated remote code execution vulnerability
9.8
CVE-2021-22991
F5 BIG-IP Traffic Management Microkernel Buffer Overflow
9.8
CVE-2021-22986
F5 BIG-IP and BIG-IQ Centralized Management iControl REST Remote Code Execution Vulnerability
9.8
CVE-2020-5902
F5 BIG-IP Traffic Management User Interface (TMUI) Remote Code Execution Vulnerability
8.8
CVE-2023-46748
BIG-IP Configuration utility authenticated SQL injection vulnerability