CVE-2018-7644: Improper signature validation

March 5, 2018 (updated October 2, 2019)

The XmlSecLibs library as used in the saml2 library in SimpleSAMLphp 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.

References

nvd.nist.gov/vuln/detail/CVE-2018-7644
simplesamlphp.org/security/201802-01

Code Behaviors & Features

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