CVE-2020-26834 - OpenCVE

SAP HANA Database, version - 2.0, does not correctly validate the username when performing SAML bearer token-based user authentication. It is possible to manipulate a valid existing SAML bearer token to authenticate as a user whose name is identical to the truncated username for whom the SAML bearer token was issued.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

Attack Vector Network

Attack Complexity High

Privileges Required Low

Scope Unchanged

Confidentiality Impact Low

Integrity Impact Low

Availability Impact None

User Interaction None

Access Vector Network

Access Complexity Low

Authentication Single

Confidentiality Impact Partial

Integrity Impact Partial

Availability Impact None

AV:N/AC:L/Au:S/C:P/I:P/A:N

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Vendors	Products
Sap	Hana Database

Configuration 1 [-]

cpe:2.3:a:sap:hana_database:2.00:*:*:*:*:*:*:*

No data.

References

Link	Providers
https://launchpad.support.sap.com/#/notes/2978768
https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=564757079

History

No history.

MITRE

Status: PUBLISHED

Assigner: sap

Published: 2020-12-09T16:30:45

Updated: 2024-08-04T16:03:22.211Z

Reserved: 2020-10-07T00:00:00

Link: CVE-2020-26834

Vulnrichment

No data.

NVD

Status : Analyzed

Published: 2020-12-09T17:15:31.323

Modified: 2020-12-10T21:38:40.243

Link: CVE-2020-26834

Redhat

No data.

{"containers": {"cna": {"affected": [{"product": "SAP HANA Database", "vendor": "SAP SE", "versions": [{"status": "affected", "version": "< 2.0"}]}], "descriptions": [{"lang": "en", "value": "SAP HANA Database, version - 2.0, does not correctly validate the username when performing SAML bearer token-based user authentication. It is possible to manipulate a valid existing SAML bearer token to authenticate as a user whose name is identical to the truncated username for whom the SAML bearer token was issued."}], "metrics": [{"cvssV3_0": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.2, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N", "version": "3.0"}}], "problemTypes": [{"descriptions": [{"description": "Improper Authentication", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2020-12-09T16:30:45", "orgId": "e4686d1a-f260-4930-ac4c-2f5c992778dd", "shortName": "sap"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=564757079"}, {"tags": ["x_refsource_MISC"], "url": "https://launchpad.support.sap.com/#/notes/2978768"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cna@sap.com", "ID": "CVE-2020-26834", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "SAP HANA Database", "version": {"version_data": [{"version_name": "<", "version_value": "2.0"}]}}]}, "vendor_name": "SAP SE"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "SAP HANA Database, version - 2.0, does not correctly validate the username when performing SAML bearer token-based user authentication. It is possible to manipulate a valid existing SAML bearer token to authenticate as a user whose name is identical to the truncated username for whom the SAML bearer token was issued."}]}, "impact": {"cvss": {"baseScore": "4.2", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N", "version": "3.0"}}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Improper Authentication"}]}]}, "references": {"reference_data": [{"name": "https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=564757079", "refsource": "MISC", "url": "https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=564757079"}, {"name": "https://launchpad.support.sap.com/#/notes/2978768", "refsource": "MISC", "url": "https://launchpad.support.sap.com/#/notes/2978768"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T16:03:22.211Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=564757079"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://launchpad.support.sap.com/#/notes/2978768"}]}]}, "cveMetadata": {"assignerOrgId": "e4686d1a-f260-4930-ac4c-2f5c992778dd", "assignerShortName": "sap", "cveId": "CVE-2020-26834", "datePublished": "2020-12-09T16:30:45", "dateReserved": "2020-10-07T00:00:00", "dateUpdated": "2024-08-04T16:03:22.211Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:sap:hana_database:2.00:*:*:*:*:*:*:*", "matchCriteriaId": "4C6CA542-7071-48B6-B135-3AE9B4BB1DC5", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "SAP HANA Database, version - 2.0, does not correctly validate the username when performing SAML bearer token-based user authentication. It is possible to manipulate a valid existing SAML bearer token to authenticate as a user whose name is identical to the truncated username for whom the SAML bearer token was issued."}, {"lang": "es", "value": "SAP HANA Database, versi\u00f3n 2.0, no comprueba correctamente el nombre de usuario cuando lleva a cabo la autenticaci\u00f3n de usuario basada en token de portador SAML. Es posible manipular un token de portador SAML existente v\u00e1lido para autenticarse como un usuario cuyo nombre es id\u00e9ntico al nombre de usuario truncado para el que se emiti\u00f3 el token de portador SAML"}], "id": "CVE-2020-26834", "lastModified": "2020-12-10T21:38:40.243", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "NONE", "baseScore": 5.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:S/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 4.2, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:N", "version": "3.0"}, "exploitabilityScore": 1.6, "impactScore": 2.5, "source": "cna@sap.com", "type": "Secondary"}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 5.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 2.5, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2020-12-09T17:15:31.323", "references": [{"source": "cna@sap.com", "tags": ["Permissions Required"], "url": "https://launchpad.support.sap.com/#/notes/2978768"}, {"source": "cna@sap.com", "tags": ["Vendor Advisory"], "url": "https://wiki.scn.sap.com/wiki/pages/viewpage.action?pageId=564757079"}], "sourceIdentifier": "cna@sap.com", "vulnStatus": "Analyzed", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "nvd@nist.gov", "type": "Primary"}]}