GHSA-9wrw-p9rm-r782

GHSA-9wrw-p9rm-r782 · onelogin/php-saml Improper signature validation on LogoutRequest/LogoutResponse.

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In order to verify Signatures on Logoutrequests and LogoutResponses we use the verifySignature of the class XMLSecurityKey from the xmlseclibs library. That method end up calling openssl_verify() depending on the signature algorithm used. The openssl_verify() function returns 1 when the signature was successfully verified, 0 if it failed to verify with the given key, and -1 in case an error occurs. PHP allows translating numerical values to boolean implicitly, with the following correspondences: - 0 equals false. - Non-zero equals true. This means that an implicit conversion to boolean of the values returned by openssl_verify() will convert an error state, signaled by the value -1, to a successful verification of the signature (represented by the boolean true). The LogoutRequest/LogoutResponse signature validator was performing an implicit conversion to boolean of the values returned by the verify() method, which subsequently will return the same output as openssl_verify() under most circumstances. This means an error during signature verification is treated as a successful verification by the method. Since the signature validation of SAMLResponses were not affected, the impact of this security vulnerability is lower, but an update of the php-saml toolkit is recommended.

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Veröffentlicht

2024-05-17T23:06:54Z

Aktualisiert

2024-12-02T05:50:14.504789Z

Technologie-Stack: php

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