F5 BIG-IP up to 11.5.8/11.6.3.3/12.1.3/13.0.1 FastL4 Virtual Server TCP Packets input validation

Summaryinfo

A vulnerability marked as problematic has been reported in F5 BIG-IP up to 11.5.8/11.6.3.3/12.1.3/13.0.1. This affects an unknown function of the component FastL4 Virtual Server. Performing a manipulation as part of TCP Packets results in input validation. This vulnerability is identified as CVE-2019-6603. The attack can be initiated remotely. There is not any exploit available.

Detailsinfo

A vulnerability, which was classified as problematic, was found in F5 BIG-IP up to 11.5.8/11.6.3.3/12.1.3/13.0.1 (Firewall Software). This affects an unknown code of the component FastL4 Virtual Server. The manipulation as part of a TCP Packets 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 availability. The summary by CVE is:

In BIG-IP 11.5.1-11.5.8, 11.6.1-11.6.3, 12.1.0-12.1.3, and 13.0.0-13.0.1, malformed TCP packets sent to a self IP address or a FastL4 virtual server may cause an interruption of service. The control plane is not exposed to this issue. This issue impacts the data plane virtual servers and self IPs.

The bug was discovered 04/04/2019. The weakness was released 03/28/2019 (Website). It is possible to read the advisory at securityfocus.com. This vulnerability is uniquely identified as CVE-2019-6603 since 01/22/2019. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The pricing for an exploit might be around USD $5k-$25k at the moment (estimation calculated on 08/17/2023).

The commercial vulnerability scanner Qualys is able to test this issue with plugin 371715 (F5 BIG-IP ASM,LTM,APM TMM vulnerability(K14632915)).

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

Entries connected to this vulnerability are available at VDB-132590, VDB-132594, VDB-132593 and VDB-132592. Be aware that VulDB is the high quality source for vulnerability data.

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
• 12.1.0
• 12.1.1
• 12.1.2
• 12.1.3
• 13.0.0
• 13.0.1

License

• commercial

Website

• Vendor: https://f5.com/

CPE 2.3info

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CPE 2.2info

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Entryinfo

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

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