Vulnerability Description
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.
CVSS Score
HIGH
Affected Products
| Vendor | Product | Versions |
|---|---|---|
| Pysaml2 Project | Pysaml2 | < 5.0.0 |
| Canonical | Ubuntu Linux | 16.04 |
| Debian | Debian Linux | 8.0 |
Related Weaknesses (CWE)
References
- https://github.com/IdentityPython/pysaml2/commit/5e9d5acbcd8ae45c4e736ac521fd2dfPatchThird Party Advisory
- https://github.com/IdentityPython/pysaml2/commit/f27c7e7a7010f83380566a219fd6a29PatchThird Party Advisory
- https://github.com/IdentityPython/pysaml2/releasesRelease NotesThird Party Advisory
- https://github.com/IdentityPython/pysaml2/releases/tag/v5.0.0Release NotesThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/02/msg00025.htmlMailing ListThird Party Advisory
- https://pypi.org/project/pysaml2/5.0.0/ProductThird Party Advisory
- https://usn.ubuntu.com/4245-1/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4630Third Party Advisory
- https://github.com/IdentityPython/pysaml2/commit/5e9d5acbcd8ae45c4e736ac521fd2dfPatchThird Party Advisory
- https://github.com/IdentityPython/pysaml2/commit/f27c7e7a7010f83380566a219fd6a29PatchThird Party Advisory
- https://github.com/IdentityPython/pysaml2/releasesRelease NotesThird Party Advisory
- https://github.com/IdentityPython/pysaml2/releases/tag/v5.0.0Release NotesThird Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/02/msg00025.htmlMailing ListThird Party Advisory
- https://pypi.org/project/pysaml2/5.0.0/ProductThird Party Advisory
- https://usn.ubuntu.com/4245-1/Third Party Advisory
FAQ
What is CVE-2020-5390?
CVE-2020-5390 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 inf...
How severe is CVE-2020-5390?
CVE-2020-5390 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2020-5390?
Check the references section above for vendor advisories and patch information. Affected products include: Pysaml2 Project Pysaml2, Canonical Ubuntu Linux, Debian Debian Linux.