{ "id": "CVE-2020-16969", "sourceIdentifier": "secure@microsoft.com", "published": "2020-10-16T23:15:16.743", "lastModified": "2024-11-21T05:07:32.040", "vulnStatus": "Modified", "cveTags": [], "descriptions": [ { "lang": "en", "value": "
An information disclosure vulnerability exists in how Microsoft Exchange validates tokens when handling certain messages. An attacker who successfully exploited the vulnerability could use this to gain further information from a user.
\nTo exploit the vulnerability, an attacker could include specially crafted OWA messages that could be loaded, without warning or filtering, from the attacker-controlled URL. This callback vector provides an information disclosure tactic used in web beacons and other types of tracking systems.
\nThe security update corrects the way that Exchange handles these token validations.
\n" }, { "lang": "es", "value": "Se presenta una vulnerabilidad de divulgaci\u00f3n de informaci\u00f3n en como Microsoft Exchange comprueba los tokens cuando maneja determinados mensajes, tambi\u00e9n se conoce como \"Microsoft Exchange Information Disclosure Vulnerability\"" } ], "metrics": { "cvssMetricV31": [ { "source": "secure@microsoft.com", "type": "Secondary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:L", "baseScore": 7.1, "baseSeverity": "HIGH", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "CHANGED", "confidentialityImpact": "LOW", "integrityImpact": "LOW", "availabilityImpact": "LOW" }, "exploitabilityScore": 2.8, "impactScore": 3.7 }, { "source": "nvd@nist.gov", "type": "Secondary", "cvssData": { "version": "3.1", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N", "baseScore": 6.5, "baseSeverity": "MEDIUM", "attackVector": "NETWORK", "attackComplexity": "LOW", "privilegesRequired": "NONE", "userInteraction": "REQUIRED", "scope": "UNCHANGED", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "availabilityImpact": "NONE" }, "exploitabilityScore": 2.8, "impactScore": 3.6 } ], "cvssMetricV2": [ { "source": "nvd@nist.gov", "type": "Primary", "cvssData": { "version": "2.0", "vectorString": "AV:N/AC:M/Au:N/C:P/I:N/A:N", "baseScore": 4.3, "accessVector": "NETWORK", "accessComplexity": "MEDIUM", "authentication": "NONE", "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "availabilityImpact": "NONE" }, "baseSeverity": "MEDIUM", "exploitabilityScore": 8.6, "impactScore": 2.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": true } ] }, "weaknesses": [ { "source": "nvd@nist.gov", "type": "Primary", "description": [ { "lang": "en", "value": "NVD-CWE-Other" } ] } ], "configurations": [ { "nodes": [ { "operator": "OR", "negate": false, "cpeMatch": [ { "vulnerable": true, "criteria": "cpe:2.3:a:microsoft:exchange_server:2013:cumulative_update_23:*:*:*:*:*:*", "matchCriteriaId": "DA166F2A-D83B-4D50-AD0B-668D813E0585" }, { "vulnerable": true, "criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_17:*:*:*:*:*:*", "matchCriteriaId": "079E1E3F-FF25-4B0D-AC98-191D6455A014" }, { "vulnerable": true, "criteria": "cpe:2.3:a:microsoft:exchange_server:2016:cumulative_update_18:*:*:*:*:*:*", "matchCriteriaId": "29805EC7-6403-44B9-91EC-109C087E98EB" }, { "vulnerable": true, "criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_6:*:*:*:*:*:*", "matchCriteriaId": "D4AB3C25-CEA8-4D66-AEE4-953C8B17911A" }, { "vulnerable": true, "criteria": "cpe:2.3:a:microsoft:exchange_server:2019:cumulative_update_7:*:*:*:*:*:*", "matchCriteriaId": "36CE5C6D-9A04-41F5-AE7C-265779833649" } ] } ] } ], "references": [ { "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16969", "source": "secure@microsoft.com", "tags": [ "Patch", "Vendor Advisory" ] }, { "url": "https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2020-16969", "source": "af854a3a-2127-422b-91ae-364da2661108", "tags": [ "Patch", "Vendor Advisory" ] } ] }