CVE-2020-5390
moderate-risk
Published 2020-01-13
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.
Do I need to act?
-
0.76% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
7
CVSS 7.5/10
High
NETWORK
/ LOW complexity
Affected Products (8)
Affected Vendors
References (16)
Release Notes
https://github.com/IdentityPython/pysaml2/releases
Third Party Advisory
https://usn.ubuntu.com/4245-1/
Third Party Advisory
https://www.debian.org/security/2020/dsa-4630
Release Notes
https://github.com/IdentityPython/pysaml2/releases
Third Party Advisory
https://usn.ubuntu.com/4245-1/
Third Party Advisory
https://www.debian.org/security/2020/dsa-4630
43
/ 100
moderate-risk
Severity
26/34 · High
Exploitability
3/34 · Minimal
Exposure
14/34 · Moderate