CVEvulnerability
CVE-2020-5390
7.5 HIGH
Official page ↗
- Status
- Modified
- Published
- 2020-01-13
- Last modified
- 2026-06-17
- Assigner
- [email protected]
- CVSS 3.1 ([email protected])
- 7.5 HIGH — CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- CVSS 2.0 ([email protected])
- 5.0 MEDIUM — AV:N/AC:L/Au:N/C:N/I:P/A:N
- Weaknesses
- CWE-347
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.
Affected configurations
• pysaml2 project pysaml2 (< 5.0.0)
• canonical ubuntu linux 16.04
• canonical ubuntu linux 18.04
• canonical ubuntu linux 19.04
• canonical ubuntu linux 19.10
• debian debian linux 8.0
• debian debian linux 9.0
• debian debian linux 10.0
Related
Weakness · CWE (1)
- CWE-347 Improper Verification of Cryptographic Signature weakness
References
- https://github.com/IdentityPython/pysaml2/commit/5e9d5acbcd8ae45c4e736ac521fd2df5b1c62e25 Patch, Third Party Advisory
- https://github.com/IdentityPython/pysaml2/commit/f27c7e7a7010f83380566a219fd6a290a00f2b6e Patch, Third Party Advisory
- https://github.com/IdentityPython/pysaml2/releases Release Notes, Third Party Advisory
- https://github.com/IdentityPython/pysaml2/releases/tag/v5.0.0 Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/02/msg00025.html Mailing List, Third Party Advisory
- https://pypi.org/project/pysaml2/5.0.0/ Product, Third Party Advisory
- https://usn.ubuntu.com/4245-1/ Third Party Advisory
- https://www.debian.org/security/2020/dsa-4630 Third Party Advisory
- https://github.com/IdentityPython/pysaml2/commit/5e9d5acbcd8ae45c4e736ac521fd2df5b1c62e25 Patch, Third Party Advisory
- https://github.com/IdentityPython/pysaml2/commit/f27c7e7a7010f83380566a219fd6a290a00f2b6e Patch, Third Party Advisory
- https://github.com/IdentityPython/pysaml2/releases Release Notes, Third Party Advisory
- https://github.com/IdentityPython/pysaml2/releases/tag/v5.0.0 Release Notes, Third Party Advisory
- https://lists.debian.org/debian-lts-announce/2020/02/msg00025.html Mailing List, Third Party Advisory
- https://pypi.org/project/pysaml2/5.0.0/ Product, Third Party Advisory
- https://usn.ubuntu.com/4245-1/ Third Party Advisory
- https://www.debian.org/security/2020/dsa-4630 Third Party Advisory