CVE-2018-5509

moderate-risk
Published 2018-03-22

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.

Do I need to act?

~
1.3% chance of exploitation in next 30 days
EPSS score — moderate exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10 High
NETWORK / LOW complexity

Affected Products (8)

Affected Vendors

F5

References (6)

Third Party Advisory http://www.securityfocus.com/bid/103504
Third Party Advisory http://www.securitytracker.com/id/1040562
Vendor Advisory https://support.f5.com/csp/article/K49440608
Third Party Advisory http://www.securityfocus.com/bid/103504
Third Party Advisory http://www.securitytracker.com/id/1040562
Vendor Advisory https://support.f5.com/csp/article/K49440608
44
/ 100
moderate-risk
Severity 26/34 · High
Exploitability 4/34 · Minimal
Exposure 14/34 · Moderate