F5 BIG-IP up to 14.1.0.1 PPTP VPN Traffic input validation

Summaryinfo

A vulnerability was found in F5 BIG-IP up to 11.5.8/11.6.3.4/12.1.4/13.1.1.1/14.1.0.1. It has been declared as problematic. This affects an unknown part of the component PPTP VPN Traffic Handler. Such manipulation leads to input validation. This vulnerability is listed as CVE-2019-6611. The attack may be performed from remote. There is no available exploit.

Detailsinfo

A vulnerability was found in F5 BIG-IP up to 11.5.8/11.6.3.4/12.1.4/13.1.1.1/14.1.0.1 (Firewall Software). It has been rated as problematic. Affected by this issue is some unknown processing of the component PPTP VPN Traffic 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:

When BIG-IP 14.0.0-14.1.0.1, 13.0.0-13.1.1.4, 12.1.0-12.1.4, 11.6.1-11.6.3.4, and 11.5.2-11.5.8 are processing certain rare data sequences occurring in PPTP VPN traffic, the BIG-IP system may execute incorrect logic. The TMM may restart and produce a core file as a result of this condition. The BIG-IP system provisioned with the CGNAT module and configured with a virtual server using a PPTP profile is exposed to this vulnerability.

The bug was discovered 05/01/2019. The weakness was presented 05/03/2019 (Website). The advisory is available at support.f5.com. This vulnerability is handled as CVE-2019-6611 since 01/22/2019. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. The technical details are unknown and an exploit is not available. The structure of the vulnerability defines a possible price range of USD $5k-$25k at the moment (estimation calculated on 09/12/2023).

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.

See VDB-134382, VDB-134381, VDB-134380 and VDB-134379 for similar entries. If you want to get best quality of vulnerability data, you may have to visit VulDB.

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
• 11.6.3.3
• 11.6.3.4
• 12.1.0
• 12.1.1
• 12.1.2
• 12.1.3
• 12.1.4
• 13.1.1.0
• 13.1.1.1
• 14.1.0.0
• 14.1.0.1

License

• commercial

Website

• Vendor: https://f5.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get best quality of vulnerability data, you may have to visit VulDB.

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