CVE-2021-22998

Home/CVE/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, 12.1.x

CVE

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, 12.1.x

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, 12.1.x before 12.1.5.3, and 11.6.x before 11.6.5.3, SYN flood protection thresholds are not enforced in secure network address translation (SNAT) listeners. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

MEDIUM · CVSS 5.3 EPSS 0.00628

Monitor

No active-exploitation, high-EPSS, or public-exploit signals - routine patching cadence

Sigma rules0 YARA rules0

▤

Affected Products & Versions

f5 big-ip access policy manager>= 11.6.1 and < 11.6.5.3
f5 big-ip access policy manager>= 12.1.0 and < 12.1.5.3
f5 big-ip access policy manager>= 13.1.0 and < 13.1.3.6
f5 big-ip access policy manager>= 14.1.0 and < 14.1.4
f5 big-ip access policy manager>= 15.1.0 and < 15.1.2.1
f5 big-ip access policy manager>= 16.0.0 and < 16.0.1.1
f5 big-ip advanced firewall manager>= 11.6.1 and < 11.6.5.3
f5 big-ip advanced firewall manager>= 12.1.0 and < 12.1.5.3
Show all 60 affected productsf5 big-ip advanced firewall manager>= 13.1.0 and < 13.1.3.6
f5 big-ip advanced firewall manager>= 14.1.0 and < 14.1.4
f5 big-ip advanced firewall manager>= 15.1.0 and < 15.1.2.1
f5 big-ip advanced firewall manager>= 16.0.0 and < 16.0.1.1
f5 big-ip advanced web application firewall>= 11.6.1 and < 11.6.5.3
f5 big-ip advanced web application firewall>= 12.1.0 and < 12.1.5.3
f5 big-ip advanced web application firewall>= 13.1.0 and < 13.1.3.6
f5 big-ip advanced web application firewall>= 14.1.0 and < 14.1.4
f5 big-ip advanced web application firewall>= 15.1.0 and < 15.1.2.1
f5 big-ip advanced web application firewall>= 16.0.0 and < 16.0.1.1
f5 big-ip analytics>= 11.6.1 and < 11.6.5.3
f5 big-ip analytics>= 12.1.0 and < 12.1.5.3
f5 big-ip analytics>= 13.1.0 and < 13.1.3.6
f5 big-ip analytics>= 14.1.0 and < 14.1.4
f5 big-ip analytics>= 15.1.0 and < 15.1.2.1
f5 big-ip analytics>= 16.0.0 and < 16.0.1.1
f5 big-ip application acceleration manager>= 11.6.1 and < 11.6.5.3
f5 big-ip application acceleration manager>= 12.1.0 and < 12.1.5.3
f5 big-ip application acceleration manager>= 13.1.0 and < 13.1.3.6
f5 big-ip application acceleration manager>= 14.1.0 and < 14.1.4
f5 big-ip application acceleration manager>= 15.1.0 and < 15.1.2.1
f5 big-ip application acceleration manager>= 16.0.0 and < 16.0.1.1
f5 big-ip application security manager>= 11.6.1 and < 11.6.5.3
f5 big-ip application security manager>= 12.1.0 and < 12.1.5.3
f5 big-ip application security manager>= 13.1.0 and < 13.1.3.6
f5 big-ip application security manager>= 14.1.0 and < 14.1.4
f5 big-ip application security manager>= 15.1.0 and < 15.1.2.1
f5 big-ip application security manager>= 16.0.0 and < 16.0.1.1
f5 big-ip ddos hybrid defender>= 11.6.1 and < 11.6.5.3
f5 big-ip ddos hybrid defender>= 12.1.0 and < 12.1.5.3
f5 big-ip ddos hybrid defender>= 13.1.0 and < 13.1.3.6
f5 big-ip ddos hybrid defender>= 14.1.0 and < 14.1.4
f5 big-ip ddos hybrid defender>= 15.1.0 and < 15.1.2.1
f5 big-ip ddos hybrid defender>= 16.0.0 and < 16.0.1.1
f5 big-ip domain name system>= 11.6.1 and < 11.6.5.3
f5 big-ip domain name system>= 12.1.0 and < 12.1.5.3
f5 big-ip domain name system>= 13.1.0 and < 13.1.3.6
f5 big-ip domain name system>= 14.1.0 and < 14.1.4
f5 big-ip domain name system>= 15.1.0 and < 15.1.2.1
f5 big-ip domain name system>= 16.0.0 and < 16.0.1.1
f5 big-ip fraud protection service>= 11.6.1 and < 11.6.5.3
f5 big-ip fraud protection service>= 12.1.0 and < 12.1.5.3
f5 big-ip fraud protection service>= 13.1.0 and < 13.1.3.6
f5 big-ip fraud protection service>= 14.1.0 and < 14.1.4
f5 big-ip fraud protection service>= 15.1.0 and < 15.1.2.1
f5 big-ip fraud protection service>= 16.0.0 and < 16.0.1.1
f5 big-ip global traffic manager>= 11.6.1 and < 11.6.5.3
f5 big-ip global traffic manager>= 12.1.0 and < 12.1.5.3
f5 big-ip global traffic manager>= 13.1.0 and < 13.1.3.6
f5 big-ip global traffic manager>= 14.1.0 and < 14.1.4
f5 big-ip global traffic manager>= 15.1.0 and < 15.1.2.1
f5 big-ip global traffic manager>= 16.0.0 and < 16.0.1.1

▣

Scoring & Timeline

5.3

MEDIUM · CVSS v3.1 · f5sirt@f5.com

View on NVD

Attack Vector

Network Adjacent Local Physical

Attack Complexity

Low High

Privileges Required

None Low High

User Interaction

None Required

Scope

Unchanged Changed

Confidentiality

None Low High

Integrity

None Low High

Availability

None Low High

Published to NVD31 Mar 2021 · 06:15 PM

CVSS VectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

🔗

References & Sources

Source URLs (vendor pages, mailing lists, write-ups). Exploit/PoC links are in their own section above to avoid duplication.

https://support.f5.com/csp/article/K31934524Vendor Advisory

Intelligence Graph · click any node to traverse

CVETechnique ActorTool Family

drag to reposition · click any node to traverse · button top-right enlarges

External lookups - second-class, for what we don’t hold ourselves

NVD CVE.org CISA Vulners Exploit-DB GitHub PoC VulnCheck KEV GreyNoise

Vulnerabilities
CISA KEV catalog
CWE weaknesses
CAPEC attack patterns
Package vulnerabilities

Threat intelligence
Threat actors
Tools & malware
ATT&CK techniques
IOCs

Detection & defense
Sigma rules
YARA rules
Atomic Red Team tests
D3FEND countermeasures

Compliance
NIST 800-53
ISO 27001:2022
SOC 2 TSC
PCI-DSS v4.0
CIS Controls v8.1

About
All capabilities
Live statistics
Data sources
Privacy policy
Terms of service

threatengine.sh · Open-source threat intelligence platform · 100+ authoritative sources · Every fact traces to its origin