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CVE-2021-22977

HIGHCVSS 7.5/10EPSS 1.02%

Last modified

CVE-2021-22977 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. On BIG-IP version 16.0.0-16.0.1 and 14.1.2.4-14.1.3, cooperation between malicious HTTP client code and a malicious server may cause TMM to restart and generate a core file. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.. EPSS estimates a 1.02% chance of exploitation in the next 30 days.

Description

On BIG-IP version 16.0.0-16.0.1 and 14.1.2.4-14.1.3, cooperation between malicious HTTP client code and a malicious server may cause TMM to restart and generate a core file. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.

Metrics

CVSS 3.1
7.5/10

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

EPSS Probability
1.02%

59.0th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
F5Big-Ip Access Policy Manager>= 14.1.0, < 14.1.3.1
F5Big-Ip Access Policy Manager>= 16.0.0, < 16.0.1.1
F5Big-Ip Advanced Firewall Manager>= 14.1.0, < 14.1.3.1
F5Big-Ip Advanced Firewall Manager>= 16.0.0, < 16.0.1.1
F5Big-Ip Advanced Web Application Firewall>= 14.1.0, < 14.1.3.1
F5Big-Ip Advanced Web Application Firewall>= 16.0.0, < 16.0.1.1
F5Big-Ip Analytics>= 14.1.0, < 14.1.3.1
F5Big-Ip Analytics>= 16.0.0, < 16.0.1.1
F5Big-Ip Application Acceleration Manager>= 14.1.0, < 14.1.3.1
F5Big-Ip Application Acceleration Manager>= 16.0.0, < 16.0.1.1
F5Big-Ip Application Security Manager>= 14.1.0, < 14.1.3.1
F5Big-Ip Application Security Manager>= 16.0.0, < 16.0.1.1
F5Big-Ip Ddos Hybrid Defender>= 14.1.0, < 14.1.3.1
F5Big-Ip Ddos Hybrid Defender>= 16.0.0, < 16.0.1.1
F5Big-Ip Domain Name System>= 14.1.0, < 14.1.3.1
F5Big-Ip Domain Name System>= 16.0.0, < 16.0.1.1
F5Big-Ip Fraud Protection Service>= 14.1.0, < 14.1.3.1
F5Big-Ip Fraud Protection Service>= 16.0.0, < 16.0.1.1
F5Big-Ip Global Traffic Manager>= 14.1.0, < 14.1.3.1
F5Big-Ip Global Traffic Manager>= 16.0.0, < 16.0.1.1
F5Big-Ip Link Controller>= 14.1.0, < 14.1.3.1
F5Big-Ip Link Controller>= 16.0.0, < 16.0.1.1
F5Big-Ip Local Traffic Manager>= 14.1.0, < 14.1.3.1
F5Big-Ip Local Traffic Manager>= 16.0.0, < 16.0.1.1
F5Big-Ip Policy Enforcement Manager>= 14.1.0, < 14.1.3.1
F5Big-Ip Policy Enforcement Manager>= 16.0.0, < 16.0.1.1
F5Big-Ip Ssl Orchestrator>= 14.1.0, < 14.1.3.1
F5Big-Ip Ssl Orchestrator>= 16.0.0, < 16.0.1.1

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2021-22977?
On BIG-IP version 16.0.0-16.0.1 and 14.1.2.4-14.1.3, cooperation between malicious HTTP client code and a malicious server may cause TMM to restart and generate a core file. Note: Software versions which have reached End of Software Development (EoSD) are not evaluated.
How severe is CVE-2021-22977?
CVE-2021-22977 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 1.02% probability of exploitation in the next 30 days.
How do I fix CVE-2021-22977?
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-2021-22977?

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

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Source: NVD / NIST