F5 BIG-IP up to 11.5.5/11.6.2/12.1.2 IPsec Tunnel access control

Summaryinfo

A vulnerability marked as critical has been reported in F5 BIG-IP up to 11.5.5/11.6.2/12.1.2. This impacts an unknown function of the component IPsec Tunnel Handler. Performing a manipulation results in access control. This vulnerability is cataloged as CVE-2017-6156. It is possible to initiate the attack remotely. There is no exploit available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability was found in F5 BIG-IP up to 11.5.5/11.6.2/12.1.2 (Firewall Software). It has been classified as critical. This affects an unknown code of the component IPsec Tunnel Handler. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-284. The product does not restrict or incorrectly restricts access to a resource from an unauthorized actor. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

When the F5 BIG-IP 12.1.0-12.1.1, 11.6.0-11.6.1, 11.5.1-11.5.5, or 11.2.1 system is configured with a wildcard IPSec tunnel endpoint, it may allow a remote attacker to disrupt or impersonate the tunnels that have completed phase 1 IPSec negotiations. The attacker must possess the necessary credentials to negotiate the phase 1 of the IPSec exchange to exploit this vulnerability; in many environment this limits the attack surface to other endpoints under the same administration.

The bug was discovered 04/13/2018. The weakness was shared 04/13/2018 (Website). The advisory is shared at support.f5.com. This vulnerability is uniquely identified as CVE-2017-6156 since 02/21/2017. It is possible to initiate the attack remotely. A authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 118623 (F5 Networks BIG-IP : BIG-IP IPsec tunnel endpoint vulnerability (K05263202)), 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 370899 (F5 BIG-IP ASM Wildcard IPsec Tunnel Endpoint Denial of Service Vulnerability (K05263202)).

Upgrading eliminates this vulnerability. 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 (118623). The entries VDB-116170, VDB-116168, VDB-116167 and VDB-116166 are related to this item. Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• F5

Name

• BIG-IP

Version

• 11.5.0
• 11.5.1
• 11.5.2
• 11.5.3
• 11.5.4
• 11.5.5
• 11.6.0
• 11.6.1
• 11.6.2
• 12.1.0
• 12.1.1
• 12.1.2

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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