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Advisories

OpenAM before 16.1.4 SAML Authentication Bypass via Unsigned Assertions

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Severity
critical
Date
Affecting

  • OpenAM >= 0, < 16.1.4

  • OpenAM >= 0, < 16.1.4

CWE
  • CWE-290 Authentication Bypass by Spoofing
CVSS
9.3
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
rockmelodies, vharseko, maximthomas, tsujiguchitky
Description
OpenAM before 16.1.4 contains an authentication bypass vulnerability in its SAML v2.0 service provider that accepts unsigned assertions on the ECP (PAOS) and HTTP-Artifact bindings when WantAssertionsSigned is false. Unauthenticated remote attackers can submit forged assertions to obtain sessions as any mapped user, including administrators, and hijack single sign-on to dependent applications.

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