GitHub Advisoryadvisory · PyPI
GHSA-qf7v-8hj3-4xw7 Improper Verification of Cryptographic Signature in PySAML2
HIGH
Official page ↗
- Aliases
- CVE-2020-5390
- Ecosystem
- PyPI
- Packages
- pysaml2
- Severity
- High
- CVSS vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N
- Weaknesses
- CWE-347
- Reviewed
- 2020-05-06
Affected packages
• PyPI pysaml2: < 5.0.0 → fixed in 5.0.0
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 assertions that have been signed.
Related
Alias · CVE (1)
- 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… vulnerability
Weakness · CWE (1)
- CWE-347 Improper Verification of Cryptographic Signature weakness
References
- https://nvd.nist.gov/vuln/detail/CVE-2020-5390 advisory
- https://github.com/IdentityPython/pysaml2/commit/5e9d5acbcd8ae45c4e736ac521fd2df5b1c62e25 web
- https://github.com/IdentityPython/pysaml2/commit/f27c7e7a7010f83380566a219fd6a290a00f2b6e web
- https://github.com/IdentityPython/pysaml2 package
- https://github.com/IdentityPython/pysaml2/blob/master/CHANGELOG.md#500-2020-01-13 web
- https://github.com/IdentityPython/pysaml2/releases web
- https://github.com/IdentityPython/pysaml2/releases/tag/v5.0.0 web
- https://github.com/advisories/GHSA-qf7v-8hj3-4xw7 advisory
- https://github.com/pypa/advisory-database/tree/main/vulns/pysaml2/PYSEC-2020-94.yaml web
- https://lists.debian.org/debian-lts-announce/2020/02/msg00025.html web
- https://pypi.org/project/pysaml2/5.0.0 web
- https://usn.ubuntu.com/4245-1 web
- https://www.debian.org/security/2020/dsa-4630 web