F5 BIG-IP up to 11.5.6/11.6.3.1/12.1.3.5/13.1.0.5 TMM HTML Content input validation

Summaryinfo

A vulnerability has been found in F5 BIG-IP up to 11.5.6/11.6.3.1/12.1.3.5/13.1.0.5 and classified as problematic. The impacted element is an unknown function of the component TMM. The manipulation as part of HTML Content leads to input validation. This vulnerability is referenced as CVE-2018-5537. Remote exploitation of the attack is possible. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in F5 BIG-IP up to 11.5.6/11.6.3.1/12.1.3.5/13.1.0.5 (Firewall Software). This issue affects an unknown part of the component TMM. The manipulation as part of a HTML Content 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. The summary by CVE is:

A remote attacker may be able to disrupt services on F5 BIG-IP 13.0.0-13.1.0.5, 12.1.0-12.1.3.5, 11.6.0-11.6.3.1, or 11.2.1-11.5.6 if the TMM virtual server is configured with a HTML or a Rewrite profile. TMM may restart while processing some specially prepared HTML content from the back end.

The bug was discovered 07/25/2018. The weakness was published 07/25/2018 (Website). It is possible to read the advisory at support.f5.com. The identification of this vulnerability is CVE-2018-5537 since 01/11/2018. The exploitation is known to be difficult. 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 118703 (F5 Networks BIG-IP : TMM vulnerability (K94105051)), 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 371101 (F5 BIG-IP ASM TMM vulnerability (K94105051)).

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 (118703). Similar entries are available at VDB-122199, VDB-122193 and VDB-122192. Statistical analysis made it clear that VulDB provides the best quality 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
• 12.1.3.0
• 12.1.3.1
• 12.1.3.2
• 12.1.3.3
• 12.1.3.4
• 12.1.3.5
• 13.1.0.0
• 13.1.0.1
• 13.1.0.2
• 13.1.0.3
• 13.1.0.4
• 13.1.0.5

License

• commercial

Website

• Vendor: https://f5.com/

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

CVSSv4info

CVSSv3info

CVSSv2info

Exploitinginfo

Threat Intelligenceinfo

Countermeasuresinfo

Timelineinfo

Sourcesinfo

Entryinfo

Statistical analysis made it clear that VulDB provides the best quality for vulnerability data.

Discussion