CVE-2021-21238
Medium
Description
PySAML2 is a pure python implementation of SAML Version 2 Standard. PySAML2 before 6.5.0 has an improper verification of cryptographic signature vulnerability. All users of pysaml2 that need to validate signed SAML documents are impacted. The vulnerability is a variant of XML Signature wrapping because it did not validate the SAML document against an XML schema. This allowed invalid XML documents to be processed and such a document can trick pysaml2 with a wrapped signature. This is fixed in PySAML2 6.5.0.
SeverityMedium
CVSS6.5
Exploit probability—
ProductPysaml2
PublishedJan 21, 2021
First seenJan 21, 2021
Weakness typeCWE-347CWE-347
How to fix
Update
- pysaml2_project pysaml26.5.0 or later
- pysaml26.5.0 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| pysaml2_project pysaml2 | v < 6.5.0 | 6.5.0 |
| pysaml2PyPI | v < 6.5.0 | 6.5.0 |
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