title: There is an privilege escalation vulnerability in organization-specific logins in Esri Portal for ArcGIS versions 10.9 and below.
description: There is an privilege escalation vulnerability in organization-specific logins in Esri Portal for ArcGIS versions 10.9 and below that may allow a remote, authenticated attacker who is able to intercept and modify a SAML assertion to impersonate another account (XML Signature Wrapping Attack). In addition patching, Esri also strongly recommends as best practice for SAML assertions to be signed and encrypted.
problem types: CWE-347 Improper Verification of Cryptographic Signature
affected:
{
defaultStatus: unaffected
platforms: x64
product: Portal for ArcGIS
vendor: Esri
versions:
lessThan: <10.9.0, status: affected, version: 10.9.0, versionType: 10.9.0
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 8.8
baseSeverity: HIGH
confidentialityImpact: HIGH
integrityImpact: HIGH
privilegesRequired: LOW
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL
solutions:  https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/Portal-for-ArcGIS-Securit... https://www.esri.com/arcgis-blog/products/arcgis-enterprise/administration/Portal-for-ArcGIS-Security-2021-Update-1-Patch
workarounds: Always encrypt and sign SAML assertions.