CVE-2020-5390

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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."}, {"lang": "es", "value": "PySAML2 versiones anteriores a la versi\u00f3n 5.0.0 no comprueba que la firma en un documento SAML est\u00e9 envuelta y, por lo tanto, el empaquetado de la firma es efectivo, es decir, est\u00e1 afectado por XML Signature Wrapping (XSW). La informaci\u00f3n de la firma y el nodo u objeto que est\u00e1 firmado puede estar en diferentes lugares y, por lo tanto, la comprobaci\u00f3n de la firma tendr\u00e1 \u00e9xito, pero ser\u00e1n usados los datos incorrectos. Esto afecta espec\u00edficamente la comprobaci\u00f3n de las afirmaciones que se han firmado."}], "id": "CVE-2020-5390", "lastModified": "2026-06-17T03:21:23.920", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:N/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-01-13T19:15:12.413", "references": [{"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/IdentityPython/pysaml2/commit/5e9d5acbcd8ae45c4e736ac521fd2df5b1c62e25"}, {"source": "cve@mitre.org", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/IdentityPython/pysaml2/commit/f27c7e7a7010f83380566a219fd6a290a00f2b6e"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/IdentityPython/pysaml2/releases"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/IdentityPython/pysaml2/releases/tag/v5.0.0"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2020/02/msg00025.html"}, {"source": "cve@mitre.org", "tags": ["Product", "Third Party Advisory"], "url": "https://pypi.org/project/pysaml2/5.0.0/"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4245-1/"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2020/dsa-4630"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/IdentityPython/pysaml2/commit/5e9d5acbcd8ae45c4e736ac521fd2df5b1c62e25"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Third Party Advisory"], "url": "https://github.com/IdentityPython/pysaml2/commit/f27c7e7a7010f83380566a219fd6a290a00f2b6e"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/IdentityPython/pysaml2/releases"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Third Party Advisory"], "url": "https://github.com/IdentityPython/pysaml2/releases/tag/v5.0.0"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2020/02/msg00025.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Product", "Third Party Advisory"], "url": "https://pypi.org/project/pysaml2/5.0.0/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://usn.ubuntu.com/4245-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2020/dsa-4630"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-347"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "python-pysaml2: does not check that the signature in a SAML document is enveloped", "id": "1794740", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1794740"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N", "status": "draft"}, "cwe": "CWE-347", "details": ["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.", "A verification flaw was found in python-pysaml2, where it did not check that the signature in a SAML document was enveloped, which enabled XML signature wrapping (XSW) attacks. A remote attacker could exploit this flaw to convince SAML processing to verify the signature and accept malicious data. This issue specifically affects the verification of signed SAML assertions."], "mitigation": {"lang": "en:us", "value": "There is no known mitigation for this issue, the flaw can only be resolved by applying updates."}, "name": "CVE-2020-5390", "package_state": [{"cpe": "cpe:/a:redhat:openstack:7", "fix_state": "Out of support scope", "impact": "low", "package_name": "python-pysaml2", "product_name": "Red Hat Enterprise Linux OpenStack Platform 7 (Kilo)"}, {"cpe": "cpe:/a:redhat:openstack:10", "fix_state": "Out of support scope", "impact": "low", "package_name": "python-pysaml2", "product_name": "Red Hat OpenStack Platform 10 (Newton)"}, {"cpe": "cpe:/a:redhat:openstack:13", "fix_state": "Will not fix", "impact": "low", "package_name": "python-pysaml2", "product_name": "Red Hat OpenStack Platform 13 (Queens)"}, {"cpe": "cpe:/a:redhat:openstack:15", "fix_state": "Will not fix", "impact": "low", "package_name": "python-pysaml2", "product_name": "Red Hat OpenStack Platform 15 (Stein)"}, {"cpe": "cpe:/a:redhat:openstack:16", "fix_state": "Will not fix", "impact": "low", "package_name": "python-pysaml2", "product_name": "Red Hat OpenStack Platform 16 (Train)"}], "public_date": "2020-01-13T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-5390\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-5390"], "statement": "All versions of Red Hat OpenStack Platform ship but do not use the flawed check-signature functionality of python-pysaml2. The impact for these products is therefore rated as having a security impact of Low and no update will be provided at this time for the impacted RHOSP packages.", "threat_severity": "Important"}

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