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CVE-2021-22992

CRITICALCVSS 9.8/10EPSS 72.71%

Last modified

CVE-2021-22992 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. 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, a malicious HTTP response to an Advanced WAF/BIG-IP ASM virtual server with Login Page configured in its policy may trigger a buffer overflow, resulting in a DoS attack. In certain situations, it may allow remote code execution (RCE), leading to complete system compromise. EPSS estimates a 72.71% chance of exploitation in the next 30 days.

Description

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, a malicious HTTP response to an Advanced WAF/BIG-IP ASM virtual server with Login Page configured in its policy may trigger a buffer overflow, resulting in a DoS attack. In certain situations, it may allow remote code execution (RCE), leading to complete system compromise. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

Metrics

CVSS 3.1
9.8/10

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

EPSS Probability
72.71%

99.4th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
F5Big-Ip Access Policy Manager>= 11.6.1, < 11.6.5.3
F5Big-Ip Access Policy Manager>= 12.1.0, < 12.1.5.3
F5Big-Ip Access Policy Manager>= 13.1.0, < 13.1.3.6
F5Big-Ip Access Policy Manager>= 14.1.0, < 14.1.4
F5Big-Ip Access Policy Manager>= 15.1.0, < 15.1.2.1
F5Big-Ip Access Policy Manager>= 16.0.0, < 16.0.1.1
F5Big-Ip Advanced Firewall Manager>= 11.6.1, < 11.6.5.3
F5Big-Ip Advanced Firewall Manager>= 12.1.0, < 12.1.5.3
F5Big-Ip Advanced Firewall Manager>= 13.1.0, < 13.1.3.6
F5Big-Ip Advanced Firewall Manager>= 14.1.0, < 14.1.4
F5Big-Ip Advanced Firewall Manager>= 15.1.0, < 15.1.2.1
F5Big-Ip Advanced Firewall Manager>= 16.0.0, < 16.0.1.1
F5Big-Ip Advanced Web Application Firewall>= 11.6.1, < 11.6.5.3
F5Big-Ip Advanced Web Application Firewall>= 12.1.0, < 12.1.5.3
F5Big-Ip Advanced Web Application Firewall>= 13.1.0, < 13.1.3.6
F5Big-Ip Advanced Web Application Firewall>= 14.1.0, < 14.1.4
F5Big-Ip Advanced Web Application Firewall>= 15.1.0, < 15.1.2.1
F5Big-Ip Advanced Web Application Firewall>= 16.0.0, < 16.0.1.1
F5Big-Ip Analytics>= 11.6.1, < 11.6.5.3
F5Big-Ip Analytics>= 12.1.0, < 12.1.5.3
F5Big-Ip Analytics>= 13.1.0, < 13.1.3.6
F5Big-Ip Analytics>= 14.1.0, < 14.1.4
F5Big-Ip Analytics>= 15.1.0, < 15.1.2.1
F5Big-Ip Analytics>= 16.0.0, < 16.0.1.1
F5Big-Ip Application Acceleration Manager>= 11.6.1, < 11.6.5.3
F5Big-Ip Application Acceleration Manager>= 12.1.0, < 12.1.5.3
F5Big-Ip Application Acceleration Manager>= 13.1.0, < 13.1.3.6
F5Big-Ip Application Acceleration Manager>= 14.1.0, < 14.1.4
F5Big-Ip Application Acceleration Manager>= 15.1.0, < 15.1.2.1
F5Big-Ip Application Acceleration Manager>= 16.0.0, < 16.0.1.1
F5Big-Ip Application Security Manager>= 11.6.1, < 11.6.5.3
F5Big-Ip Application Security Manager>= 12.1.0, < 12.1.5.3
F5Big-Ip Application Security Manager>= 13.1.0, < 13.1.3.6
F5Big-Ip Application Security Manager>= 14.1.0, < 14.1.4
F5Big-Ip Application Security Manager>= 15.1.0, < 15.1.2.1
F5Big-Ip Application Security Manager>= 16.0.0, < 16.0.1.1
F5Big-Ip Ddos Hybrid Defender>= 11.6.1, < 11.6.5.3
F5Big-Ip Ddos Hybrid Defender>= 12.1.0, < 12.1.5.3
F5Big-Ip Ddos Hybrid Defender>= 13.1.0, < 13.1.3.6
F5Big-Ip Ddos Hybrid Defender>= 14.1.0, < 14.1.4
F5Big-Ip Ddos Hybrid Defender>= 15.1.0, < 15.1.2.1
F5Big-Ip Ddos Hybrid Defender>= 16.0.0, < 16.0.1.1
F5Big-Ip Domain Name System>= 11.6.1, < 11.6.5.3
F5Big-Ip Domain Name System>= 12.1.0, < 12.1.5.3
F5Big-Ip Domain Name System>= 13.1.0, < 13.1.3.6
F5Big-Ip Domain Name System>= 14.1.0, < 14.1.4
F5Big-Ip Domain Name System>= 15.1.0, < 15.1.2.1
F5Big-Ip Domain Name System>= 16.0.0, < 16.0.1.1
F5Big-Ip Fraud Protection Service>= 11.6.1, < 11.6.5.3
F5Big-Ip Fraud Protection Service>= 12.1.0, < 12.1.5.3

Showing 50 of 84 affected configurations. See NVD for the full list.

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-22992?
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, a malicious HTTP response to an Advanced WAF/BIG-IP ASM virtual server with Login Page configured in its policy may trigger a buffer overflow, resulting in a DoS attack. In certain situations, it may allow remote code execution (RCE), leading to complete system compromise. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
How severe is CVE-2021-22992?
CVE-2021-22992 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 72.71% probability of exploitation in the next 30 days.
How do I fix CVE-2021-22992?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2021-22992?

Run a free Strix scan to check your systems for this vulnerability.

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Source: NVD / NIST