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CVE-2018-5506: 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…

CVE-2018-5506 is rated critical with a CVSS v3.0 base score of 9.8 and NVD lists 13 affected products, including F5 Big IP Local Traffic Manager. Per its scoring, it can be exploited over the network, without authentication, without any user interaction. The scored impact on confidentiality, integrity and availability is the highest available.

Vulnerability description

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.

Severity breakdown

CVSS v3.0 9.8: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

  • Attack vector: Network. Exploitable remotely over the network, with no need for local or physical access.
  • Attack complexity: Low. No special conditions; the attack can be repeated reliably.
  • Privileges required: None. No account or prior access is needed.
  • User interaction: None. No action from any user is needed.
  • Scope: Unchanged. Impact stays within the vulnerable component.
  • Confidentiality impact: High. Total loss of confidentiality; sensitive data can be fully disclosed.
  • Integrity impact: High. Total loss of integrity; data or system state can be fully modified.
  • Availability impact: High. Total loss of availability; the component can be shut down.

Affected products

  • F5 Big IP Local Traffic Manager: from 11.5.1 up to and including 11.5.5; from 12.1.0 up to and including 12.1.3.1; 11.2.1; 11.6.1; 13.0.0
  • F5 Big IP Application Acceleration Manager: from 11.5.1 up to and including 11.5.5; from 12.1.0 up to and including 12.1.3.1; 11.2.1; 11.6.1; 13.0.0
  • F5 Big IP Advanced Firewall Manager: from 11.5.1 up to and including 11.5.5; from 12.1.0 up to and including 12.1.3.1; 11.2.1; 11.6.1; 13.0.0
  • F5 Big IP Analytics: from 11.5.1 up to and including 11.5.5; from 12.1.0 up to and including 12.1.3.1; 11.2.1; 11.6.1; 13.0.0
  • F5 Big IP Access Policy Manager: from 11.5.1 up to and including 11.5.5; from 12.1.0 up to and including 12.1.3.1; 11.2.1; 11.6.1; 13.0.0
  • F5 Big IP Application Security Manager: from 11.5.1 up to and including 11.5.5; from 12.1.0 up to and including 12.1.3.1; 11.2.1; 11.6.1; 13.0.0
  • F5 Big IP Edge Gateway: from 11.5.1 up to and including 11.5.5; from 12.1.0 up to and including 12.1.3.1; 11.2.1; 11.6.1; 13.0.0
  • F5 Big IP Global Traffic Manager: from 11.5.1 up to and including 11.5.5; from 12.1.0 up to and including 12.1.3.1; 11.2.1; 11.6.1; 13.0.0
  • F5 Big IP Link Controller: from 11.5.1 up to and including 11.5.5; from 12.1.0 up to and including 12.1.3.1; 11.2.1; 11.6.1; 13.0.0
  • F5 Big IP Policy Enforcement Manager: from 11.5.1 up to and including 11.5.5; from 12.1.0 up to and including 12.1.3.1; 11.2.1; 11.6.1; 13.0.0
  • F5 Big IP Webaccelerator: from 11.5.1 up to and including 11.5.5; from 12.1.0 up to and including 12.1.3.1; 11.2.1; 11.6.1; 13.0.0
  • F5 Big IP Websafe: from 11.5.1 up to and including 11.5.5; from 12.1.0 up to and including 12.1.3.1; 11.2.1; 11.6.1; 13.0.0
  • F5 Big IP Domain Name System: from 11.5.1 up to and including 11.5.5; from 12.1.0 up to and including 12.1.3.1; 11.2.1; 11.6.1; 13.0.0

References