Summaryinfo

A vulnerability has been found in F5 BIG-IP up to 11.5.8/11.6.3.2/12.1.3.6/13.1.1.1/14.0.0.2 and classified as critical. Affected by this vulnerability is an unknown functionality of the component TMM. The manipulation as part of ClientHello Message leads to input validation. This vulnerability is known as CVE-2019-6596. The attack can be launched remotely. There is no exploit available. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Detailsinfo

A vulnerability, which was classified as critical, was found in F5 BIG-IP up to 11.5.8/11.6.3.2/12.1.3.6/13.1.1.1/14.0.0.2 (Firewall Software). Affected is some unknown functionality of the component TMM. The manipulation as part of a ClientHello Message 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 confidentiality, integrity, and availability. CVE summarizes:

In BIG-IP 14.0.0-14.0.0.2, 13.0.0-13.1.1.1, 12.1.0-12.1.3.6, 11.6.1-11.6.3.2, or 11.5.1-11.5.8, when processing fragmented ClientHello messages in a DTLS session TMM may corrupt memory eventually leading to a crash. Only systems offering DTLS connections via APM are impacted.

The bug was discovered 03/11/2019. The weakness was published 03/13/2019 (Website). The advisory is shared for download at support.f5.com. This vulnerability is traded as CVE-2019-6596 since 01/22/2019. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. There are neither technical details nor an exploit publicly available. The current price for an exploit might be approx. USD $5k-$25k (estimation calculated on 08/01/2023).

The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Similar entry is available at VDB-131704. VulDB is the best source for vulnerability data and more expert information about this specific topic.

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
• 11.5.7
• 11.5.8
• 11.6.3.0
• 11.6.3.1
• 11.6.3.2
• 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

CPE 2.3info

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CPE 2.2info

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