F5 BIG-IP up to 15.0.1.1 Virtual Clustered Multiprocessing Fragmented IP Packet input validation

Summaryinfo

A vulnerability categorized as critical has been discovered in F5 BIG-IP up to 11.6.5.1/12.1.5/13.1.3.1/14.1.2.2/15.0.1.1. Impacted is an unknown function of the component Virtual Clustered Multiprocessing. Such manipulation as part of Fragmented IP Packet leads to input validation. This vulnerability is referenced as CVE-2019-6684. It is possible to launch the attack remotely. No exploit is available.

Detailsinfo

A vulnerability was found in F5 BIG-IP up to 11.6.5.1/12.1.5/13.1.3.1/14.1.2.2/15.0.1.1 (Firewall Software). It has been rated as critical. Affected by this issue is an unknown functionality of the component Virtual Clustered Multiprocessing. The manipulation as part of a Fragmented IP Packet 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 confidentiality, integrity, and availability. CVE summarizes:

On versions 15.0.0-15.0.1.1, 14.0.0-14.1.2.2, 13.1.0-13.1.3.1, 12.1.0-12.1.5, and 11.5.2-11.6.5.1, under certain conditions, a multi-bladed BIG-IP Virtual Clustered Multiprocessing (vCMP) may drop broadcast packets when they are rebroadcast to the vCMP guest secondary blades. An attacker can leverage the fragmented broadcast IP packets to perform any type of fragmentation-based attack.

The weakness was published 12/23/2019 (Website). The advisory is shared for download at support.f5.com. This vulnerability is handled as CVE-2019-6684 since 01/22/2019. The attack may be launched remotely. No form of authentication is required for exploitation. 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 12/24/2019).

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

Similar entries are available at VDB-147682, VDB-147681, VDB-147677 and VDB-147676. 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

• 11.6.5.0
• 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
• 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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CPE 2.2info

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Entryinfo

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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