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CVE-2018-5509

UnknownEPSS 2.87%

Last modified

CVE-2018-5509 is a vulnerability of currently unknown severity. On F5 BIG-IP versions 13.0.0 or 12.1.0 - 12.1.3.1, when a specifically configured virtual server receives traffic of an undisclosed nature, TMM will crash and take the configured failover action, potentially causing a denial of service. The configuration which exposes this issue is not common and in general does not work when enabled in previous versions of BIG-IP. EPSS estimates a 2.87% chance of exploitation in the next 30 days.

Description

On F5 BIG-IP versions 13.0.0 or 12.1.0 - 12.1.3.1, when a specifically configured virtual server receives traffic of an undisclosed nature, TMM will crash and take the configured failover action, potentially causing a denial of service. The configuration which exposes this issue is not common and in general does not work when enabled in previous versions of BIG-IP. Starting in 12.1.0, BIG-IP will crash if the configuration which exposes this issue is enabled and the virtual server receives non TCP traffic. With the fix of this issue, additional configuration validation logic has been added to prevent this configuration from being applied to a virtual server. There is only data plane exposure to this issue with a non-standard configuration. There is no control plane exposure.

Metrics

EPSS Probability
2.87%

85.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

Affected Software

VendorProductVersions
F5Big-Ip Access Policy Manager>= 12.1.0, < 12.1.3.2
F5Big-Ip Access Policy Manager>= 13.0.0, < 13.1.0.4
F5Big-Ip Advanced Firewall Manager>= 12.1.0, < 12.1.3.2
F5Big-Ip Advanced Firewall Manager>= 13.0.0, < 13.1.0.4
F5Big-Ip Application Acceleration Manager>= 12.1.0, < 12.1.3.2
F5Big-Ip Application Acceleration Manager>= 13.0.0, < 13.1.0.4
F5Big-Ip Application Security Manager>= 12.1.0, < 12.3.1.2
F5Big-Ip Application Security Manager>= 13.0.0, < 13.1.0.4
F5Big-Ip Link Controller>= 12.1.0, < 12.1.3.2
F5Big-Ip Link Controller>= 13.0.0, < 13.1.0.4
F5Big-Ip Local Traffic Manager>= 12.1.0, < 12.1.3.2
F5Big-Ip Local Traffic Manager>= 13.0.0, < 13.1.0.4
F5Big-Ip Policy Enforcement Manager>= 12.1.0, < 12.1.3.2
F5Big-Ip Policy Enforcement Manager>= 13.0.0, < 13.1.0.4
F5Big-Ip Websafe1.0.0

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2018-5509?
On F5 BIG-IP versions 13.0.0 or 12.1.0 - 12.1.3.1, when a specifically configured virtual server receives traffic of an undisclosed nature, TMM will crash and take the configured failover action, potentially causing a denial of service. The configuration which exposes this issue is not common and in general does not work when enabled in previous versions of BIG-IP. Starting in 12.1.0, BIG-IP will crash if the configuration which exposes this issue is enabled and the virtual server receives non TCP traffic. With the fix of this issue, additional configuration validation logic has been added to prevent this configuration from being applied to a virtual server. There is only data plane exposure to this issue with a non-standard configuration. There is no control plane exposure.
How severe is CVE-2018-5509?
Severity scoring for CVE-2018-5509 is pending analysis. The EPSS model estimates a 2.87% probability of exploitation in the next 30 days.
How do I fix CVE-2018-5509?
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.

How Strix Helps

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Source: NVD / NIST