xml-security is a library that implements XML signatures and encryption. Validation of an XML signature requires verification that the hash value of the related XML-document matches a specific DigestValue-value, but also that the cryptographic signature on the SignedInfo-tree (the one that contains the DigestValue) verifies and matches a trusted public key. If an attacker somehow (i.e. by exploiting a bug in PHPs canonicalization function) manages to manipulate the canonicalized versions DigestValue, it would be possible to forge the signature. This issue has been patched in version 1.6.12 and 5.0.0-alpha.13.
The product does not sufficiently verify the origin or authenticity of data, in a way that causes it to accept invalid data.
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Saml2 | Simplesamlphp | 5.0.0-alpha12 (including) | 5.0.0-alpha12 (including) |
| Xml-security | Simplesamlphp | 1.6.11 (including) | 1.6.11 (including) |