F5 BIG-IP up to 15.1.0.1 iRules Command DATAGRAM::tcp input validation

Summaryinfo

A vulnerability classified as problematic has been found in F5 BIG-IP up to 11.6.5.1/12.1.5.1/13.1.3.3/14.1.2.3/15.1.0.1. This affects the function DATAGRAM::tcp of the component iRules Command Handler. This manipulation causes input validation. This vulnerability is tracked as CVE-2020-5877. The attack is possible to be carried out remotely. No exploit exists.

Detailsinfo

A vulnerability classified as problematic was found in F5 BIG-IP up to 11.6.5.1/12.1.5.1/13.1.3.3/14.1.2.3/15.1.0.1 (Firewall Software). Affected by this vulnerability is the function DATAGRAM::tcp of the component iRules Command Handler. The manipulation with an unknown input leads to a input validation vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect availability. The summary by CVE is:

On BIG-IP 15.0.0-15.1.0.1, 14.1.0-14.1.2.3, 13.1.0-13.1.3.3, 12.1.0-12.1.5.1, and 11.6.1-11.6.5.1, malformed input to the DATAGRAM::tcp iRules command within a FLOW_INIT event may lead to a denial of service.

The weakness was disclosed 04/30/2020 (Website). The advisory is shared at support.f5.com. This vulnerability is known as CVE-2020-5877 since 01/06/2020. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. The price for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 05/01/2020).

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

The entries VDB-154660, VDB-154658, VDB-154656 and VDB-154655 are pretty similar. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• F5

Name

• BIG-IP

Version

• 11.6.5.0
• 11.6.5.1
• 12.1.5.0
• 12.1.5.1
• 13.1.3.0
• 13.1.3.1
• 13.1.3.2
• 13.1.3.3
• 14.1.2.0
• 14.1.2.1
• 14.1.2.2
• 14.1.2.3
• 15.1.0.0
• 15.1.0.1

License

• commercial

Website

• Vendor: https://f5.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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