CVE-2021-35209

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "descriptions": [{"lang": "en", "value": "An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.x before 9.0.0 Patch 16. The value of the X-Host header overwrites the value of the Host header in proxied requests. The value of X-Host header is not checked against the whitelist of hosts Zimbra is allowed to proxy to (the zimbraProxyAllowedDomains setting)."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-08-02T19:35:26.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories"}, {"tags": ["x_refsource_MISC"], "url": "https://wiki.zimbra.com/wiki/Security_Center"}, {"tags": ["x_refsource_MISC"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16"}, {"tags": ["x_refsource_MISC"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23"}, {"tags": ["x_refsource_MISC"], "url": "https://blog.sonarsource.com/zimbra-webmail-compromise-via-email"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2021-35209", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.x before 9.0.0 Patch 16. The value of the X-Host header overwrites the value of the Host header in proxied requests. The value of X-Host header is not checked against the whitelist of hosts Zimbra is allowed to proxy to (the zimbraProxyAllowedDomains setting)."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories", "refsource": "MISC", "url": "https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories"}, {"name": "https://wiki.zimbra.com/wiki/Security_Center", "refsource": "MISC", "url": "https://wiki.zimbra.com/wiki/Security_Center"}, {"name": "https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16", "refsource": "MISC", "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16"}, {"name": "https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23", "refsource": "MISC", "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23"}, {"name": "https://blog.sonarsource.com/zimbra-webmail-compromise-via-email", "refsource": "MISC", "url": "https://blog.sonarsource.com/zimbra-webmail-compromise-via-email"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T00:33:51.186Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://wiki.zimbra.com/wiki/Security_Center"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://blog.sonarsource.com/zimbra-webmail-compromise-via-email"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2021-35209", "datePublished": "2021-07-02T18:54:43.000Z", "dateReserved": "2021-06-22T00:00:00.000Z", "dateUpdated": "2024-08-04T00:33:51.186Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:zimbra:collaboration:*:*:*:*:*:*:*:*", "matchCriteriaId": "9BDCCB43-EBE0-4E5D-B2E1-E346A3694AB9", "versionEndExcluding": "8.8.15", "versionStartIncluding": "8.8", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:8.8.15:-:*:*:*:*:*:*", "matchCriteriaId": "1B17C1A7-0F0A-4E7C-8C0C-0BBB0BF66C82", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:8.8.15:p1:*:*:*:*:*:*", "matchCriteriaId": "BA48C450-201C-4398-AB65-EF6F95FB0380", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:8.8.15:p10:*:*:*:*:*:*", "matchCriteriaId": "5F759114-CF2D-48BF-8D09-EBE8D1ED1949", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:8.8.15:p11:*:*:*:*:*:*", "matchCriteriaId": "AE8BD950-24A2-4AFF-B7EE-6EE115BD75D6", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:8.8.15:p12:*:*:*:*:*:*", "matchCriteriaId": "C43634F5-2946-44D2-8A50-B717374A8126", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:8.8.15:p13:*:*:*:*:*:*", "matchCriteriaId": "20315895-5410-4B88-B2D9-E9C5D79A64DF", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:8.8.15:p14:*:*:*:*:*:*", "matchCriteriaId": "BF405091-A832-4945-87EC-AA525F37DF91", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:8.8.15:p15:*:*:*:*:*:*", "matchCriteriaId": "C9B6FFA8-CFD2-47C6-9475-79210CB9AA84", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:8.8.15:p16:*:*:*:*:*:*", "matchCriteriaId": "964CA714-937C-4FC0-A1E9-07F846C786BD", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:8.8.15:p17:*:*:*:*:*:*", "matchCriteriaId": "DAF8F155-1406-46ED-A81F-BCC4CE525F43", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:8.8.15:p18:*:*:*:*:*:*", "matchCriteriaId": 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"4BB93336-CC3C-4B7F-B194-7DED036ABBAF", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:9.0.0:p12:*:*:*:*:*:*", "matchCriteriaId": "876F1675-F65C-4E86-ADBD-36EB8D8A997D", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:9.0.0:p2:*:*:*:*:*:*", "matchCriteriaId": "12D0D469-6C9B-4B66-9581-DC319773238A", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:9.0.0:p3:*:*:*:*:*:*", "matchCriteriaId": "C52705E6-2C6B-47BC-A0CD-F6AAE0BFC302", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:9.0.0:p4:*:*:*:*:*:*", "matchCriteriaId": "33F50D8C-7027-4A8D-8E95-98C224283772", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:9.0.0:p5:*:*:*:*:*:*", "matchCriteriaId": "82000BA4-1781-4312-A7BD-92EC94D137AE", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:9.0.0:p6:*:*:*:*:*:*", "matchCriteriaId": "4B52D301-2559-457A-8FFB-F0915299355A", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:9.0.0:p7:*:*:*:*:*:*", "matchCriteriaId": "7215AE2C-8A33-4AB9-88D5-7C8CD11E806C", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:9.0.0:p8:*:*:*:*:*:*", "matchCriteriaId": "CDC810C7-45DA-4BDF-9138-2D3B2750243E", "vulnerable": true}, {"criteria": "cpe:2.3:a:zimbra:collaboration:9.0.0:p9:*:*:*:*:*:*", "matchCriteriaId": "E09D95A4-764D-4E0B-8605-1D94FD548AB2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "An issue was discovered in ProxyServlet.java in the /proxy servlet in Zimbra Collaboration Suite 8.8 before 8.8.15 Patch 23 and 9.x before 9.0.0 Patch 16. The value of the X-Host header overwrites the value of the Host header in proxied requests. The value of X-Host header is not checked against the whitelist of hosts Zimbra is allowed to proxy to (the zimbraProxyAllowedDomains setting)."}, {"lang": "es", "value": "Se ha detectado un problema en el archivo ProxyServlet.java en el servlet /proxy en Zimbra Collaboration Suite versiones 8.8 anteriores a 8.8.15 Patch 23 y versiones 9.x anteriores a 9.0.0 Patch 16. El valor de la cabecera X-Host sobrescribe el valor de la cabecera Host en las peticiones proxy. El valor de la cabecera X-Host no es comprobado con la lista blanca de hosts a los que Zimbra tiene permitido hacer proxy (la configuraci\u00f3n zimbraProxyAllowedDomains)"}], "id": "CVE-2021-35209", "lastModified": "2026-06-17T03:57:18.203", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 7.5, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 6.4, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-07-02T19:15:08.460", "references": [{"source": "cve@mitre.org", "tags": ["Exploit", "Third Party Advisory"], "url": "https://blog.sonarsource.com/zimbra-webmail-compromise-via-email"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Security_Center"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23"}, {"source": "cve@mitre.org", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Third Party Advisory"], "url": "https://blog.sonarsource.com/zimbra-webmail-compromise-via-email"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Security_Center"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/8.8.15/P23"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Release Notes", "Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Releases/9.0.0/P16"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://wiki.zimbra.com/wiki/Zimbra_Security_Advisories"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-918"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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