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CVE Record

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 t...

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.

UnknownCVSS not scoredNot KEV-listedUpdated
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Glexia's TakeAutomated analysis

Security readout for executives and security teams

This flaw can crash F5 BIG-IP traffic handling when a rare virtual server configuration receives certain non-TCP traffic. The result is denial of service and failover action, not management takeover. Business urgency depends on whether affected BIG-IP versions and the uncommon configuration are present. Exposure appears limited to organizations running affected BIG-IP versions with the specific uncommon virtual server configuration. The source states the configuration is not common and generally did not work when enabled in earlier BIG-IP versions. Prioritize review for internet-facing or high-availability BIG-IP deployments. The issue is narrower than broad remote compromise, but a traffic-plane crash on load balancers can still interrupt critical applications. Mitigation focus: Review F5 advisory K49440608 for corrected versions and configuration guidance.; Upgrade affected BIG-IP deployments according to F5 guidance.; Remove or avoid the exposing non-standard virtual server configuration where identified..

Prepared

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

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Vulnerability profileCVE Program record
Severity
Unknown
CVSS
Not scored
Known Exploited
No
Published
Official CVE source material

CNA and ADP enrichment extracted from CVE v5

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0CVSS vectors
0Timeline events
0ADP providers
2Source links

CVSS and timeline data

No CVSS vectors or timeline events were available in the normalized CVE source material.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
F5 Networks, Inc.BIG-IP (LTM, AAM, AFM, APM, ASM, Link Controller, PEM, WebSafe)13.0.0, 12.1.0 - 12.1.3.1Listed
Weakness

CWE details

No CWE listed

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