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Advisories

OpenAM before 16.1.4 SAML 1.x Signature Verification Issuer Impersonation

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Severity
high
Date
Affecting

  • OpenAM >= 0, < 16.1.4

CWE
  • CWE-347 Improper Verification of Cryptographic Signature
CVSS
7.5
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
isazajuancarlos, vharseko, maximthomas, tsujiguchitky
Description
OpenAM before 16.1.4 does not verify that a signed SAML 1.x assertion or response was signed by the partner named as its issuer, accepting a signature from any certificate in OpenAM's keystore. An attacker holding such a private key, such as a trusted SAML 1.x partner, can forge assertions claiming another partner's issuer and sign in as that partner's users, including privileged ones.

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