F5 BIG-IP up to 11.5.6/11.6.3.1/12.1.2/13.0.0 TMM SSL input validation

Summaryinfo

A vulnerability identified as critical has been detected in F5 BIG-IP up to 11.5.6/11.6.3.1/12.1.2/13.0.0. Affected by this issue is some unknown functionality of the component TMM. The manipulation leads to input validation (SSL). This vulnerability is documented as CVE-2018-5533. The attack can be initiated remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in F5 BIG-IP up to 11.5.6/11.6.3.1/12.1.2/13.0.0 (Firewall Software) and classified as critical. This issue affects some unknown functionality of the component TMM. The manipulation with an unknown input leads to a input validation vulnerability (SSL). 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 confidentiality, integrity, and availability. The summary by CVE is:

Under certain conditions on F5 BIG-IP 13.0.0, 12.1.0-12.1.2, 11.6.0-11.6.3.1, or 11.5.0-11.5.6, TMM may core while processing SSL forward proxy traffic.

The bug was discovered 07/19/2018. The weakness was released 07/19/2018 (Website). It is possible to read the advisory at support.f5.com. The identification of this vulnerability is CVE-2018-5533 since 01/12/2018. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 118665 (F5 Networks BIG-IP : SSL forward proxy vulnerability (K45325728)), 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 371089 (F5 BIG-IP ASM SSL forward proxy vulnerability (K45325728)).

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 (118665). Entries connected to this vulnerability are available at VDB-121994, VDB-121993, VDB-121992 and VDB-121990. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• F5

Name

• BIG-IP

Version

• 11.5.0
• 11.5.1
• 11.5.2
• 11.5.3
• 11.5.4
• 11.5.5
• 11.5.6
• 11.6.3.0
• 11.6.3.1
• 12.1.0
• 12.1.1
• 12.1.2
• 13.0

License

• commercial

Website

• Vendor: https://f5.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Be aware that VulDB is the high quality source for vulnerability data.

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