F5 BIG-IP up to 13.1.0.3 TLS Handshake input validation

Summaryinfo

A vulnerability was found in F5 BIG-IP up to 13.1.0.3. It has been rated as problematic. Impacted is an unknown function of the component TLS Handshake Handler. Performing a manipulation results in input validation. This vulnerability is cataloged as CVE-2018-5513. It is possible to initiate the attack remotely. There is no exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as problematic has been found in F5 BIG-IP up to 13.1.0.3 (Firewall Software). This affects an unknown function of the component TLS Handshake Handler. The manipulation with an unknown input leads to a input validation vulnerability. CWE is classifying the issue as 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. This is going to have an impact on availability. The summary by CVE is:

On F5 BIG-IP 13.1.0-13.1.0.3, 13.0.0, 12.1.0-12.1.3.3, 11.6.1-11.6.3.1, 11.5.1-11.5.5, or 11.2.1, a malformed TLS handshake causes TMM to crash leading to a disruption of service. This issue is only exposed on the data plane when Proxy SSL configuration is enabled. The control plane is not impacted by this issue.

The bug was discovered 05/31/2018. The weakness was shared 06/01/2018 (Website). The advisory is shared at securitytracker.com. This vulnerability is uniquely identified as CVE-2018-5513 since 01/12/2018. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 118669 (F5 Networks BIG-IP : TMM vulnerability (K46940010)), 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 370997 (F5 BIG-IP ASM TMM Denial of Service Vulnerability (K46940010)).

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

The vulnerability is also documented in the vulnerability database at Tenable (118669). The entries VDB-118633, VDB-118632, VDB-118631 and VDB-118630 are related to this item. If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Type

• Firewall Software

Vendor

• F5

Name

• BIG-IP

Version

• 11.2.0
• 11.2.1
• 11.5.0
• 11.5.1
• 11.5.2
• 11.5.3
• 11.5.4
• 11.5.5
• 11.6.3.0
• 11.6.3.1
• 12.1.3.0
• 12.1.3.1
• 12.1.3.2
• 12.1.3.3
• 13.0
• 13.1.0.0
• 13.1.0.1
• 13.1.0.2
• 13.1.0.3

License

• commercial

Website

• Vendor: https://f5.com/

CPE 2.3info

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CPE 2.2info

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