PySAML2 before 5.0.0 does not check that the signature in...
Vulnerability Description
PySAML2 before 5.0.0 does not check that the signature in a SAML document is enveloped and thus signature wrapping is effective, i.e., it is affected by XML Signature Wrapping (XSW). The signature information and the node/object that is signed can be in different places and thus the signature verification will succeed, but the wrong data will be used. This specifically affects the verification of assertion that have been signed.
Impact Analysis
Refer to official advisory for detailed impact metrics.
Remediation
Ensure systems are updated to the latest vendor-supplied patch levels.
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Credits & Attribution
No credits recorded in the NVD database.
References
- https://github.com/IdentityPython/pysaml2/commit/5e9d5acbcd8ae45c4e736ac521fd2df5b1c62e25
- https://github.com/IdentityPython/pysaml2/commit/f27c7e7a7010f83380566a219fd6a290a00f2b6e
- https://github.com/IdentityPython/pysaml2/releases/tag/v5.0.0
- https://github.com/IdentityPython/pysaml2/releases
- https://pypi.org/project/pysaml2/5.0.0/
- https://usn.ubuntu.com/4245-1/
- https://www.debian.org/security/2020/dsa-4630
- https://lists.debian.org/debian-lts-announce/2020/02/msg00025.html
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CVSS Vectors
Weaknesses (CWE)
No CWE data available
MITRE ATT&CK TTPs
No associated TTPs found for this vulnerability.