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Security Advisories: MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWo4ajgtMzQ4di13Zm0z

Python-saml allows manipulation of SAML data without invalidation of cryptographic signature

OneLogin PythonSAML 2.3.0 and earlier may incorrectly utilize the results of XML DOM traversal and canonicalization APIs in such a way that an attacker may be able to manipulate the SAML data without invalidating the cryptographic signature, allowing the attack to potentially bypass authentication to SAML service providers.

Permalink: https://github.com/advisories/GHSA-j8j8-348v-wfm3
JSON: https://advisories.ecosyste.ms/api/v1/advisories/MDE2OlNlY3VyaXR5QWR2aXNvcnlHSFNBLWo4ajgtMzQ4di13Zm0z
Source: GitHub Advisory Database
Origin: Unspecified
Severity: High
Classification: General
Published: almost 5 years ago
Updated: 9 months ago

CVSS Score: 7.7
CVSS vector: CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N

Identifiers: GHSA-j8j8-348v-wfm3, CVE-2017-11427
References:

• https://nvd.nist.gov/vuln/detail/CVE-2017-11427
• https://duo.com/blog/duo-finds-saml-vulnerabilities-affecting-multiple-implementations
• https://github.com/advisories/GHSA-j8j8-348v-wfm3
• https://www.kb.cert.org/vuls/id/475445
• https://github.com/SAML-Toolkits/python-saml/commit/fad881b4432febea69d70691dfed51c93f0de10f

Repository: https://github.com/SAML-Toolkits/python-saml
Blast Radius: 16.3

Affected Packages