F5 BIG-IP up to 12.1.3.6/13.1.1.1/14.0.0.2 MPTCP Connection input validation

Summaryinfo

A vulnerability was found in F5 BIG-IP up to 12.1.3.6/13.1.1.1/14.0.0.2. It has been declared as problematic. Affected is an unknown function of the component MPTCP Connection Handler. Such manipulation leads to input validation. This vulnerability is documented as CVE-2018-15318. The attack can be executed remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in F5 BIG-IP up to 12.1.3.6/13.1.1.1/14.0.0.2 (Firewall Software) and classified as problematic. Affected by this issue is some unknown processing of the component MPTCP Connection Handler. The manipulation with an unknown input leads to a input validation vulnerability. Using CWE to declare the problem leads to CWE-20. The product receives input or data, but it does not validate or incorrectly validates that the input has the properties that are required to process the data safely and correctly. Impacted is availability. CVE summarizes:

In BIG-IP 14.0.0-14.0.0.2, 13.1.0.4-13.1.1.1, or 12.1.3.4-12.1.3.6, if an MPTCP connection receives a HUDCTL_ABORT while the initial flow is not the primary flow, the initial flow will remain after the MP_FASTCLOSE procedure is complete. TMM may restart and produce a core file as a result of this condition.

The bug was discovered 11/01/2018. The weakness was released 10/30/2018 (Website). The advisory is shared for download at support.f5.com. This vulnerability is handled as CVE-2018-15318 since 08/14/2018. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are neither technical details nor an exploit publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 118634 (F5 Networks BIG-IP : TMM vulnerability (K16248201)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family F5 Networks Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 371347 (F5 BIG-IP ASM,LTM,APM Traffic Management Microkernel(TMM) Denial of Service Vulnerability (K16248201)).

Upgrading eliminates this vulnerability. A possible mitigation has been published before and not just after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (118634). Entries connected to this vulnerability are available at VDB-126360, VDB-126359, VDB-126358 and VDB-126357. Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• F5

Name

• BIG-IP

Version

• 12.1.3.0
• 12.1.3.1
• 12.1.3.2
• 12.1.3.3
• 12.1.3.4
• 12.1.3.5
• 12.1.3.6
• 13.1.1.0
• 13.1.1.1
• 14.0.0.0
• 14.0.0.1
• 14.0.0.2

License

• commercial

Website

• Vendor: https://f5.com/

CPE 2.3info

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CPE 2.2info

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Once again VulDB remains the best source for vulnerability data.

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