CVE - CVE-2021-21239

CVE-ID
CVE-2021-21239	Learn more at National Vulnerability Database (NVD) • CVSS Severity Rating • Fix Information • Vulnerable Software Versions • SCAP Mappings • CPE Information
Description
PySAML2 is a pure python implementation of SAML Version 2 Standard. PySAML2 before 6.5.0 has an improper verification of cryptographic signature vulnerability. Users of pysaml2 that use the default CryptoBackendXmlSec1 backend and need to verify signed SAML documents are impacted. PySAML2 does not ensure that a signed SAML document is correctly signed. The default CryptoBackendXmlSec1 backend is using the xmlsec1 binary to verify the signature of signed SAML documents, but by default xmlsec1 accepts any type of key found within the given document. xmlsec1 needs to be configured explicitly to only use only _x509 certificates_ for the verification process of the SAML document signature. This is fixed in PySAML2 6.5.0.
References
Note: References are provided for the convenience of the reader to help distinguish between vulnerabilities. The list is not intended to be complete.
CONFIRM:https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-5p3x-r448-pc62 URL:https://github.com/IdentityPython/pysaml2/security/advisories/GHSA-5p3x-r448-pc62 MISC:https://github.com/IdentityPython/pysaml2/commit/46578df0695269a16f1c94171f1429873f90ed99 URL:https://github.com/IdentityPython/pysaml2/commit/46578df0695269a16f1c94171f1429873f90ed99 MISC:https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0 URL:https://github.com/IdentityPython/pysaml2/releases/tag/v6.5.0 MISC:https://pypi.org/project/pysaml2 URL:https://pypi.org/project/pysaml2 MISC:https://www.aleksey.com/pipermail/xmlsec/2013/009717.html URL:https://www.aleksey.com/pipermail/xmlsec/2013/009717.html MLIST:[debian-lts-announce] 20210226 [SECURITY] [DLA 2577-1] python-pysaml2 security update URL:https://lists.debian.org/debian-lts-announce/2021/02/msg00038.html
Assigning CNA
GitHub (maintainer security advisories)
Date Record Created
20201222	Disclaimer: The record creation date may reflect when the CVE ID was allocated or reserved, and does not necessarily indicate when this vulnerability was discovered, shared with the affected vendor, publicly disclosed, or updated in CVE.
Phase (Legacy)
Assigned (20201222)
Votes (Legacy)

Comments (Legacy)

Proposed (Legacy)
N/A
This is an record on the CVE List, which provides common identifiers for publicly known cybersecurity vulnerabilities.
Search CVE Using Keywords: You can also search by reference using the CVE Reference Maps.
For More Information: CVE Request Web Form (select "Other" from dropdown)