A vulnerability, which was classified as problematic, has been found in F5 BIG-IP 12.1.2-HF1/13.0.0 (Firewall Software). This issue affects an unknown part of the component TMM. The manipulation as part of a Request leads to a access control vulnerability. Using CWE to declare the problem leads to CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. Impacted is availability. The summary by CVE is:

In F5 BIG-IP LTM, AAM, AFM, Analytics, APM, ASM, DNS, Link Controller, PEM, and WebSafe 12.1.2-HF1 and 13.0.0, an undisclosed series of requests may cause TMM to restart, causing an interruption of service. Specifically, only BIG-IP Virtual Server with "SSL Forward Proxy" setting enabled in both the assigned Client and Server SSL profiles deployments are impacted by this issue. Customers with use cases which the "SSL Forward Proxy" setup connects to untrusted servers are at highest risk while customers with use cases which the "SSL Forward Proxy" setup connects to trusted servers have a lower risk.

The bug was discovered 09/18/2017. The weakness was presented 09/18/2017 (Website). It is possible to read the advisory at support.f5.com. The identification of this vulnerability is CVE-2017-6147 since 02/21/2017. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

The vulnerability scanner Nessus provides a plugin with the ID 103262 (F5 Networks BIG-IP : F5 TMM vulnerability (K43945001)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family F5 Networks Local Security Checks and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 370579 (F5 BIG-IP ASM SSL Forward Proxy Denial of Service Vulnerability (K43945001)).

Addressing this vulnerability is possible by firewalling . A possible mitigation has been published even before and not after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (103262).

Productinfo

Type

• Firewall Software

Vendor

• F5

Name

• BIG-IP

Version

• 12.1.2-HF1
• 13.0.0

License

• commercial

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CPE 2.2info

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