F5 BIG-IP Virtual Server up to 15.0.1.1 FastL4 Profile resource consumption

Summaryinfo

A vulnerability was found in F5 BIG-IP Virtual Server up to 15.0.1.1. It has been rated as problematic. This issue affects some unknown processing of the component FastL4 Profile Handler. This manipulation causes resource consumption. The identification of this vulnerability is CVE-2019-6683. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability was found in F5 BIG-IP Virtual Server up to 15.0.1.1 (Firewall Software). It has been declared as problematic. Affected by this vulnerability is an unknown function of the component FastL4 Profile Handler. The manipulation with an unknown input leads to a resource consumption vulnerability. The CWE definition for the vulnerability is CWE-400. The product does not properly control the allocation and maintenance of a limited resource, thereby enabling an actor to influence the amount of resources consumed, eventually leading to the exhaustion of available resources. As an impact it is known to affect availability. The summary by CVE is:

On versions 15.0.0-15.0.1.1, 14.1.0-14.1.2.2, 14.0.0-14.0.1, 13.1.0-13.1.3.2, 12.1.0-12.1.5, and 11.5.2-11.6.5.1, BIG-IP virtual servers with Loose Initiation enabled on a FastL4 profile may be subject to excessive flow usage under undisclosed conditions.

The weakness was shared 12/23/2019 (Website). It is possible to read the advisory at support.f5.com. This vulnerability is known as CVE-2019-6683 since 01/22/2019. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/24/2019). The attack technique deployed by this issue is T1499 according to MITRE ATT&CK.

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

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

Productinfo

Type

• Firewall Software

Vendor

• F5

Name

• BIG-IP Virtual Server

Version

• 11.6.5.0
• 11.6.5.1
• 12.1.0
• 12.1.1
• 12.1.2
• 12.1.3
• 12.1.4
• 12.1.5
• 13.1.3.0
• 13.1.3.1
• 13.1.3.2
• 14.0.0
• 14.0.1
• 14.1.2.0
• 14.1.2.1
• 14.1.2.2
• 15.0.1.0
• 15.0.1.1

License

• commercial

Website

• Vendor: https://f5.com/

CPE 2.3info

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