CVE-2020-5390

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.

• CWE-347

• https://github.com/IdentityPython/pysaml2/commit/5e9d5acbcd8ae45c4e736ac521fd2df5b1c62e25Patch, Third Party Advisory
• https://github.com/IdentityPython/pysaml2/commit/f27c7e7a7010f83380566a219fd6a290a00f2b6ePatch, Third Party Advisory
• https://github.com/IdentityPython/pysaml2/releasesRelease Notes, Third Party Advisory
• https://github.com/IdentityPython/pysaml2/releases/tag/v5.0.0Release Notes, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2020/02/msg00025.htmlMailing 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-4630Third Party Advisory
• https://github.com/IdentityPython/pysaml2/commit/5e9d5acbcd8ae45c4e736ac521fd2df5b1c62e25Patch, Third Party Advisory
• https://github.com/IdentityPython/pysaml2/commit/f27c7e7a7010f83380566a219fd6a290a00f2b6ePatch, Third Party Advisory
• https://github.com/IdentityPython/pysaml2/releasesRelease Notes, Third Party Advisory
• https://github.com/IdentityPython/pysaml2/releases/tag/v5.0.0Release Notes, Third Party Advisory
• https://lists.debian.org/debian-lts-announce/2020/02/msg00025.htmlMailing 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-4630Third Party Advisory

Published

Jan 13, 2020

Last Modified

Jun 17, 2026

Status

Modified

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