F5 BIG-IP up to 11.2.1/11.5.5/11.6.1/12.1.2/13.0.0 mod_auth_f5_auth_token.cpp Brute Force credentials management

Summaryinfo

A vulnerability classified as problematic was found in F5 BIG-IP up to 11.2.1/11.5.5/11.6.1/12.1.2/13.0.0. The impacted element is an unknown function of the file mod_auth_f5_auth_token.cpp. Executing a manipulation can lead to credentials management (Brute Force). This vulnerability is registered as CVE-2018-5506. It is possible to launch the attack remotely. No exploit is available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical was found in F5 BIG-IP up to 11.2.1/11.5.5/11.6.1/12.1.2/13.0.0 (Firewall Software). This vulnerability affects an unknown function of the file mod_auth_f5_auth_token.cpp. The manipulation with an unknown input leads to a credentials management vulnerability (Brute Force). The CWE definition for the vulnerability is CWE-255. As an impact it is known to affect confidentiality, integrity, and availability. CVE summarizes:

In F5 BIG-IP 13.0.0, 12.1.0-12.1.2, 11.6.1, 11.5.1-11.5.5, or 11.2.1 the Apache modules apache_auth_token_mod and mod_auth_f5_auth_token.cpp allow possible unauthenticated bruteforce on the em_server_ip authorization parameter to obtain which SSL client certificates used for mutual authentication between BIG-IQ or Enterprise Manager (EM) and managed BIG-IP devices.

The bug was discovered 04/13/2018. The weakness was published 04/13/2018 (Website). The advisory is shared for download at support.f5.com. This vulnerability was named CVE-2018-5506 since 01/12/2018. The attack can be initiated remotely. The successful exploitation requires a single authentication. There are known technical details, but no exploit is available. The MITRE ATT&CK project declares the attack technique as T1552.

The vulnerability scanner Nessus provides a plugin with the ID 118692 (F5 Networks BIG-IP : Apache vulnerability (K65355492)), 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 370893 (F5 BIG-IP ASM Apache Modules Information Disclosure Vulnerability (K65355492)).

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 (118692). Similar entries are available at VDB-116204, VDB-116203 and VDB-116201. 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

• 11.2.0
• 11.2.1
• 11.5.0
• 11.5.1
• 11.5.2
• 11.5.3
• 11.5.4
• 11.5.5
• 11.6.0
• 11.6.1
• 12.1.0
• 12.1.1
• 12.1.2
• 13.0

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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