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.
Weakness
The product does not verify, or incorrectly verifies, the cryptographic signature for data.
Affected Software
| Name | Vendor | Start Version | End Version |
|---|---|---|---|
| Pysaml2 | Pysaml2_project | * | 6.5.0 (excluding) |
| Python-pysaml2 | Ubuntu | bionic | * |
| Python-pysaml2 | Ubuntu | esm-infra/bionic | * |
| Python-pysaml2 | Ubuntu | esm-infra/focal | * |
| Python-pysaml2 | Ubuntu | esm-infra/xenial | * |
| Python-pysaml2 | Ubuntu | focal | * |
| Python-pysaml2 | Ubuntu | groovy | * |
| Python-pysaml2 | Ubuntu | hirsute | * |
| Python-pysaml2 | Ubuntu | impish | * |
| Python-pysaml2 | Ubuntu | jammy | * |
| Python-pysaml2 | Ubuntu | kinetic | * |
| Python-pysaml2 | Ubuntu | trusty | * |
| Python-pysaml2 | Ubuntu | upstream | * |
| Python-pysaml2 | Ubuntu | xenial | * |
Related Attack Patterns
References
- https://github.com/IdentityPython/pysaml2/commit/1d8fd268f5bf887480a403a7a5ef8f048157cc14
- https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0
- https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-f4g9-h89h-jgv9
- https://pypi.org/project/pysaml2
- https://github.com/IdentityPython/pysaml2/commit/1d8fd268f5bf887480a403a7a5ef8f048157cc14
- https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0
- https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-f4g9-h89h-jgv9
- https://pypi.org/project/pysaml2