CVE-2017-2669

{"containers": {"cna": {"affected": [{"product": "dovecot", "vendor": "[UNKNOWN]", "versions": [{"status": "affected", "version": "dovecot 2.2.29"}]}], "datePublic": "2017-04-10T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "Dovecot before version 2.2.29 is vulnerable to a denial of service. When 'dict' passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart), or excessive CPU usage causing all authentications to hang."}], "metrics": [{"cvssV3_0": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.0"}}], "problemTypes": [{"descriptions": [{"cweId": "CWE-20", "description": "CWE-20", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2018-06-22T09:57:01.000Z", "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat"}, "references": [{"name": "[dovecot-news] 20170410 v2.2.29 released", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "https://dovecot.org/pipermail/dovecot-news/2017-April/000341.html"}, {"name": "[oss-security] 20170411 CVE-2017-2669: Dovecot DoS when passdb dict was used for authentication", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "http://www.openwall.com/lists/oss-security/2017/04/11/1"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2669"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735.patch"}, {"name": "DSA-3828", "tags": ["vendor-advisory", "x_refsource_DEBIAN"], "url": "https://www.debian.org/security/2017/dsa-3828"}, {"name": "97536", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/97536"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "secalert@redhat.com", "ID": "CVE-2017-2669", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "dovecot", "version": {"version_data": [{"version_value": "dovecot 2.2.29"}]}}]}, "vendor_name": "[UNKNOWN]"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "Dovecot before version 2.2.29 is vulnerable to a denial of service. When 'dict' passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart), or excessive CPU usage causing all authentications to hang."}]}, "impact": {"cvss": [[{"vectorString": "3.7/CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.0"}]]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-20"}]}]}, "references": {"reference_data": [{"name": "[dovecot-news] 20170410 v2.2.29 released", "refsource": "MLIST", "url": "https://dovecot.org/pipermail/dovecot-news/2017-April/000341.html"}, {"name": "[oss-security] 20170411 CVE-2017-2669: Dovecot DoS when passdb dict was used for authentication", "refsource": "MLIST", "url": "http://www.openwall.com/lists/oss-security/2017/04/11/1"}, {"name": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2669", "refsource": "CONFIRM", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2669"}, {"name": "https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735.patch", "refsource": "CONFIRM", "url": "https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735.patch"}, {"name": "DSA-3828", "refsource": "DEBIAN", "url": "https://www.debian.org/security/2017/dsa-3828"}, {"name": "97536", "refsource": "BID", "url": "http://www.securityfocus.com/bid/97536"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T14:02:06.877Z"}, "title": "CVE Program Container", "references": [{"name": "[dovecot-news] 20170410 v2.2.29 released", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://dovecot.org/pipermail/dovecot-news/2017-April/000341.html"}, {"name": "[oss-security] 20170411 CVE-2017-2669: Dovecot DoS when passdb dict was used for authentication", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2017/04/11/1"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2669"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735.patch"}, {"name": "DSA-3828", "tags": ["vendor-advisory", "x_refsource_DEBIAN", "x_transferred"], "url": "https://www.debian.org/security/2017/dsa-3828"}, {"name": "97536", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"], "url": "http://www.securityfocus.com/bid/97536"}]}]}, "cveMetadata": {"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "assignerShortName": "redhat", "cveId": "CVE-2017-2669", "datePublished": "2018-06-21T13:00:00.000Z", "dateReserved": "2016-12-01T00:00:00.000Z", "dateUpdated": "2024-08-05T14:02:06.877Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"affected": [{"affectedData": [{"product": "dovecot", "vendor": "[UNKNOWN]", "versions": [{"status": "affected", "version": "dovecot 2.2.29"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:dovecot:dovecot:*:*:*:*:*:*:*:*", "matchCriteriaId": "D6A0F511-D72E-464A-BA7B-477C9CC0B479", "versionEndIncluding": "2.2.28", "versionStartIncluding": "2.2.26", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "C11E6FB0-C8C0-4527-9AA0-CB9B316F8F43", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Dovecot before version 2.2.29 is vulnerable to a denial of service. When 'dict' passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart), or excessive CPU usage causing all authentications to hang."}, {"lang": "es", "value": "Dovecot en versiones anteriores a la 2.2.29 es vulnerable a una denegaci\u00f3n de servicio (DoS). Cuando se emplearon los \"dict\" passdb y userdb para la autenticaci\u00f3n de usuarios, el nombre de usuario enviado por el cliente IMAP/POP3 se envi\u00f3 mediante var_expand() para realizar la expansi\u00f3n de %variable. El env\u00edo de campos %variable especialmente manipulados podr\u00eda resultar en un uso excesivo de memoria que provoca que el proceso se cierre inesperadamente (y se reinicie) o en un uso excesivo de CPU que provoca que todas las autenticaciones dejen de responder."}], "id": "CVE-2017-2669", "lastModified": "2026-06-17T01:16:37.520", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 10.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.0"}, "exploitabilityScore": 2.2, "impactScore": 1.4, "source": "secalert@redhat.com", "type": "Secondary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2018-06-21T13:29:00.317", "references": [{"source": "secalert@redhat.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2017/04/11/1"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/97536"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2669"}, {"source": "secalert@redhat.com", "tags": ["Vendor Advisory"], "url": "https://dovecot.org/pipermail/dovecot-news/2017-April/000341.html"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735.patch"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2017/dsa-3828"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2017/04/11/1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/97536"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2017-2669"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "https://dovecot.org/pipermail/dovecot-news/2017-April/000341.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://github.com/dovecot/core/commit/000030feb7a30f193197f1aab8a7b04a26b42735.patch"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2017/dsa-3828"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-20"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank the Dovecot project for reporting this issue.", "bugzilla": {"description": "dovecot: Dovecot DoS when passdb dict was used for authentication", "id": "1438676", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1438676"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.7", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L", "status": "draft"}, "cwe": "CWE-20", "details": ["Dovecot before version 2.2.29 is vulnerable to a denial of service. When 'dict' passdb and userdb were used for user authentication, the username sent by the IMAP/POP3 client was sent through var_expand() to perform %variable expansion. Sending specially crafted %variable fields could result in excessive memory usage causing the process to crash (and restart), or excessive CPU usage causing all authentications to hang."], "name": "CVE-2017-2669", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "dovecot", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "dovecot", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "dovecot", "product_name": "Red Hat Enterprise Linux 7"}], "public_date": "2017-04-10T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-2669\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-2669"], "statement": "Versions of dovecot shipped in Red Hat Enterprise Linux 5, 6 and 7 are not affected by this vulnerability.", "threat_severity": "Low"}

{}