Key Confusion Vulnerability in XmlSecLibs Library Allows Impersonation in SimpleSAMLphp

CVE-2018-7644 · MEDIUM Severity

AV:N/AC:L/AU:N/C:N/I:P/A:N

The XmlSecLibs library as used in the saml2 library in SimpleSAMLphp before 1.15.3 incorrectly verifies signatures on SAML assertions, allowing a remote attacker to construct a crafted SAML assertion on behalf of an Identity Provider that would pass as cryptographically valid, thereby allowing them to impersonate a user from that Identity Provider, aka a key confusion issue.

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