Vulnerability in Identitypython Pysaml2
CVE-2021-21238
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.
EPSS: 0.011 (61.6th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N.
Affected products
- Identitypython Pysaml2 — versions < 6.5.0
- Pysaml2_project Pysaml2
Weakness classification (CWE)
References
- security-advisories@github.com (Product, Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (Third Party Advisory, x_refsource_MISC)
- security-advisories@github.com (x_refsource_CONFIRM, Third Party Advisory)
- security-advisories@github.com (Patch, Third Party Advisory, x_refsource_MISC)
Frequently asked questions
- What is CVE-2021-21238?
- CVE-2021-21238 is a medium-severity vulnerability in Identitypython Pysaml2, classified under Improper Verification of Cryptographic Signature. CVSS score: 6.5/10. Published 2021-01-21.
- How severe is CVE-2021-21238?
- Medium severity. CVSS v3 base score is 6.5 out of 10.