CVE-2017-11427

Advisory

Multiple SAML libraries may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.

Affected package

Affected versions

Fixed versions

Vulnerability changelog

* Fix vulnerability [CVE-2017-11427](https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11427). Process text of nodes properly, ignoring comments
* Improve how fingerprint is calcultated
* Fix issue with LogoutRequest rejected by ADFS due NameID with unspecified format instead no format attribute
* Fix signature position in the SP metadata
* [80](https://github.com/onelogin/python3-saml/pull/80) Preserve xmlns:xs namespace when signing and serializing responses
* Redefine NSMAP constant
* Updated Django demo (Django 1.11).

Resources

• https://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2017-11427
• https://www.kb.cert.org/vuls/id/475445
• https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations