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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLXFmN3YtOGhqMy00eHc3

Improper Verification of Cryptographic Signature in PySAML2

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 assertions that have been signed.

Permalink: https://github.com/advisories/GHSA-qf7v-8hj3-4xw7
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLXFmN3YtOGhqMy00eHc3
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: over 4 years ago
Updated: 3 months ago


CVSS Score: 7.5
CVSS vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

EPSS Percentage: 0.0037
EPSS Percentile: 0.72517

Identifiers: GHSA-qf7v-8hj3-4xw7, CVE-2020-5390
References: Repository: https://github.com/IdentityPython/pysaml2
Blast Radius: 19.3

Affected Packages

pypi:pysaml2
Dependent packages: 26
Dependent repositories: 378
Downloads: 797,976 last month
Affected Version Ranges: < 5.0.0
Fixed in: 5.0.0
All affected versions: 0.4.3, 1.0.1, 1.0.2, 1.0.3, 1.1.0, 2.0.0, 2.1.0, 2.2.0, 2.3.0, 2.4.0, 3.0.0, 3.0.2, 4.0.0, 4.0.1, 4.0.2, 4.0.3, 4.0.4, 4.0.5, 4.1.0, 4.2.0, 4.3.0, 4.4.0, 4.5.0, 4.6.0, 4.6.1, 4.6.2, 4.6.3, 4.6.4, 4.6.5, 4.7.0, 4.8.0, 4.9.0
All unaffected versions: 5.0.0, 5.1.0, 5.2.0, 5.3.0, 5.4.0, 6.0.0, 6.1.0, 6.2.0, 6.3.0, 6.3.1, 6.4.0, 6.4.1, 6.5.0, 6.5.1, 6.5.2, 7.0.0, 7.0.1, 7.1.0, 7.1.1, 7.1.2, 7.2.0, 7.2.1, 7.3.0, 7.3.1, 7.4.0, 7.4.1, 7.4.2, 7.5.0