Improper Validation Affecting pysaml2 package, versions [,6.5.0)
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Test your applications- Snyk ID SNYK-PYTHON-PYSAML2-1063039
- published 20 Jan 2021
- disclosed 20 Jan 2021
- credit Victor Schönfelder Garcia, Juraj Somorovsky, Vladislav Mladenov
Introduced: 20 Jan 2021
CVE-2021-21238 Open this link in a new tabHow to fix?
Upgrade pysaml2 to version 6.5.0 or higher.
Overview
pysaml2 is a Python implementation of SAML Version 2 Standard.
Affected versions of this package are vulnerable to Improper Validation. By default, the SAML document is not validated against an XML schema. This allows invalid XML documents to trick the verification process, by presenting elements with a valid signature inside elements whose content has been malformed. The verification is offloaded to xmlsec1 and xmlsec1 will not validate every signature in the given document, but only the first it finds in the given scope.