CVE-2021-22999 — HIGH (7.5)

Q: How severe is CVE-2021-22999?

CVE-2021-22999 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Q: Is there a patch for CVE-2021-22999?

Check the references section above for vendor advisories and patch information. Affected products include: F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Advanced Web Application Firewall, F5 Big-Ip Analytics, F5 Big-Ip Application Acceleration Manager.

Vulnerability Description

On versions 15.0.x before 15.1.0 and 14.1.x before 14.1.4, the BIG-IP system provides an option to connect HTTP/2 clients to HTTP/1.x servers. When a client is slow to accept responses and it closes a connection prematurely, the BIG-IP system may indefinitely retain some streams unclosed. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

CVSS Score

7.5

HIGH

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

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

NONE

Integrity

NONE

Availability

HIGH

Affected Products

Vendor	Product	Versions
F5	Big-Ip Access Policy Manager	>= 14.1.0, < 14.1.4
F5	Big-Ip Advanced Firewall Manager	>= 14.1.0, < 14.1.4
F5	Big-Ip Advanced Web Application Firewall	>= 14.1.0, < 14.1.4
F5	Big-Ip Analytics	>= 14.1.0, < 14.1.4
F5	Big-Ip Application Acceleration Manager	>= 14.1.0, < 14.1.4
F5	Big-Ip Application Security Manager	>= 14.1.0, < 14.1.4
F5	Big-Ip Ddos Hybrid Defender	>= 14.1.0, < 14.1.4
F5	Big-Ip Domain Name System	>= 14.1.0, < 14.1.4
F5	Big-Ip Fraud Protection Service	>= 14.1.0, < 14.1.4
F5	Big-Ip Global Traffic Manager	>= 14.1.0, < 14.1.4
F5	Big-Ip Link Controller	>= 14.1.0, < 14.1.4
F5	Big-Ip Local Traffic Manager	>= 14.1.0, < 14.1.4
F5	Big-Ip Policy Enforcement Manager	>= 14.1.0, < 14.1.4
F5	Ssl Orchestrator	>= 14.1.0, < 14.1.4

References

https://support.f5.com/csp/article/K02333782Vendor Advisory
https://support.f5.com/csp/article/K02333782Vendor Advisory

FAQ

What is CVE-2021-22999?

CVE-2021-22999 is a vulnerability with a CVSS score of 7.5 (HIGH). On versions 15.0.x before 15.1.0 and 14.1.x before 14.1.4, the BIG-IP system provides an option to connect HTTP/2 clients to HTTP/1.x servers. When a client is slow to accept responses and it closes a...

How severe is CVE-2021-22999?

CVE-2021-22999 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2021-22999?

Check the references section above for vendor advisories and patch information. Affected products include: F5 Big-Ip Access Policy Manager, F5 Big-Ip Advanced Firewall Manager, F5 Big-Ip Advanced Web Application Firewall, F5 Big-Ip Analytics, F5 Big-Ip Application Acceleration Manager.