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Servers and applications

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 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
Critical 9.8
Published
13 Apr 2018
Last changed
17 Jun 2026
Added to UpHeron
1 Nov 2026
Exploit chance
0.7% in the next 30 daysHigher than 54% of CVEs. EPSS by FIRST, 10 Nov 2026
Sources
NVD

Affected software

SoftwareAffected versions
F5 BIG-IPServers and applications · cpe:a:f5:big-ip_access_policy_manager
  • Version 11.2.1
  • From 11.5.1 up to 11.5.5
  • Version 11.6.1
  • From 12.1.0 up to 12.1.3.1
  • Version 13.0.0
F5 BIG-IPServers and applications · cpe:a:f5:big-ip_local_traffic_manager
  • Version 11.2.1
  • From 11.5.1 up to 11.5.5
  • Version 11.6.1
  • From 12.1.0 up to 12.1.3.1
  • Version 13.0.0

References

  • NVD https://nvd.nist.gov/vuln/detail/CVE-2018-5506
  • CVE.org https://www.cve.org/CVERecord?id=CVE-2018-5506