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CVE-2023-40534

HIGHCVSS 7.5/10EPSS 0.54%

Last modified

CVE-2023-40534 is a high-severity vulnerability rated 7.5/10 on the CVSS scale. When a client-side HTTP/2 profile and the HTTP MRF Router option are enabled for a virtual server, and an iRule using the HTTP_REQUEST event or Local Traffic Policy are associated with the virtual server, undisclosed requests can cause TMM to terminate.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.. EPSS estimates a 0.54% chance of exploitation in the next 30 days.

Description

When a client-side HTTP/2 profile and the HTTP MRF Router option are enabled for a virtual server, and an iRule using the HTTP_REQUEST event or Local Traffic Policy are associated with the virtual server, undisclosed requests can cause TMM to terminate.  Note: Software versions which have reached End of Technical Support (EoTS) 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
0.54%

41.1th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
F5Big-Ip Access Policy Manager>= 16.1.0, < 16.1.4.1
F5Big-Ip Access Policy Manager17.1.0
F5Big-Ip Advanced Firewall Manager>= 16.1.0, < 16.1.4.1
F5Big-Ip Advanced Firewall Manager17.1.0
F5Big-Ip Advanced Web Application Firewall>= 16.1.0, < 16.1.4.1
F5Big-Ip Advanced Web Application Firewall17.1.0
F5Big-Ip Analytics>= 16.1.0, < 16.1.4.1
F5Big-Ip Analytics17.1.0
F5Big-Ip Application Acceleration Manager>= 16.1.0, < 16.1.4.1
F5Big-Ip Application Acceleration Manager17.1.0
F5Big-Ip Application Security Manager>= 16.1.0, < 16.1.4.1
F5Big-Ip Application Security Manager17.1.0
F5Big-Ip Application Visibility And Reporting>= 16.1.0, < 16.1.4.1
F5Big-Ip Application Visibility And Reporting17.1.0
F5Big-Ip Carrier-Grade Nat>= 16.1.0, < 16.1.4.1
F5Big-Ip Carrier-Grade Nat17.1.0
F5Big-Ip Ddos Hybrid Defender>= 16.1.0, < 16.1.4.1
F5Big-Ip Ddos Hybrid Defender17.1.0
F5Big-Ip Domain Name System>= 16.1.0, < 16.1.4.1
F5Big-Ip Domain Name System17.1.0
F5Big-Ip Edge Gateway>= 16.1.0, < 16.1.4.1
F5Big-Ip Edge Gateway17.1.0
F5Big-Ip Fraud Protection Service>= 16.1.0, < 16.1.4.1
F5Big-Ip Fraud Protection Service17.1.0
F5Big-Ip Global Traffic Manager>= 16.1.0, < 16.1.4.1
F5Big-Ip Global Traffic Manager17.1.0
F5Big-Ip Link Controller>= 16.1.0, < 16.1.4.1
F5Big-Ip Link Controller17.1.0
F5Big-Ip Local Traffic Manager>= 16.1.0, < 16.1.4.1
F5Big-Ip Local Traffic Manager17.1.0
F5Big-Ip Next Service Proxy For Kubernetes>= 1.6.0, <= 1.8.2
F5Big-Ip Policy Enforcement Manager>= 16.1.0, < 16.1.4.1
F5Big-Ip Policy Enforcement Manager17.1.0
F5Big-Ip Ssl Orchestrator>= 16.1.0, < 16.1.4.1
F5Big-Ip Ssl Orchestrator17.1.0
F5Big-Ip Webaccelerator>= 16.1.0, < 16.1.4.1
F5Big-Ip Webaccelerator17.1.0
F5Big-Ip Websafe>= 16.1.0, < 16.1.4.1
F5Big-Ip Websafe17.1.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2023-40534?
When a client-side HTTP/2 profile and the HTTP MRF Router option are enabled for a virtual server, and an iRule using the HTTP_REQUEST event or Local Traffic Policy are associated with the virtual server, undisclosed requests can cause TMM to terminate.  Note: Software versions which have reached End of Technical Support (EoTS) are not evaluated.
How severe is CVE-2023-40534?
CVE-2023-40534 has a CVSS score of 7.5/10 (HIGH severity). The EPSS model estimates a 0.54% probability of exploitation in the next 30 days.
How do I fix CVE-2023-40534?
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-2023-40534?

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

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Source: NVD / NIST