CVE-2021-20247

{"containers": {"cna": {"affected": [{"product": "isync/mbsync", "vendor": "n/a", "versions": [{"status": "affected", "version": "before 1.35"}, {"status": "affected", "version": "before 1.4.1"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in mbsync before v1.3.5 and v1.4.1. Validations of the mailbox names returned by IMAP LIST/LSUB do not occur allowing a malicious or compromised server to use specially crafted mailbox names containing '..' path components to access data outside the designated mailbox on the opposite end of the synchronization channel. 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Validations of the mailbox names returned by IMAP LIST/LSUB do not occur allowing a malicious or compromised server to use specially crafted mailbox names containing '..' path components to access data outside the designated mailbox on the opposite end of the synchronization channel. The highest threat from this vulnerability is to data confidentiality and integrity."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-20->CWE-22"}]}]}, "references": {"reference_data": [{"name": "https://bugzilla.redhat.com/show_bug.cgi?id=1928963", "refsource": "MISC", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1928963"}, {"name": "https://www.openwall.com/lists/oss-security/2021/02/22/1", "refsource": "MISC", "url": "https://www.openwall.com/lists/oss-security/2021/02/22/1"}, {"name": "FEDORA-2021-954ebabcf7", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/CAXQLCK35QGRCRENRTGKJO4VVZGUXUJJ/"}, {"name": "FEDORA-2021-ef8c2acfce", "refsource": "FEDORA", "url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/GVDEBZQJMWDW5JFK4NTHH6DAFNAZTESW/"}, {"name": "[debian-lts-announce] 20220701 [SECURITY] [DLA 3066-1] isync security update", "refsource": "MLIST", "url": "https://lists.debian.org/debian-lts-announce/2022/07/msg00001.html"}, {"name": "GLSA-202208-15", "refsource": "GENTOO", "url": "https://security.gentoo.org/glsa/202208-15"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T17:37:23.202Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1928963"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://www.openwall.com/lists/oss-security/2021/02/22/1"}, {"name": "FEDORA-2021-954ebabcf7", "tags": ["vendor-advisory", "x_refsource_FEDORA", "x_transferred"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CAXQLCK35QGRCRENRTGKJO4VVZGUXUJJ/"}, {"name": "FEDORA-2021-ef8c2acfce", "tags": ["vendor-advisory", "x_refsource_FEDORA", "x_transferred"], "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GVDEBZQJMWDW5JFK4NTHH6DAFNAZTESW/"}, {"name": "[debian-lts-announce] 20220701 [SECURITY] [DLA 3066-1] isync security update", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "https://lists.debian.org/debian-lts-announce/2022/07/msg00001.html"}, {"name": "GLSA-202208-15", "tags": ["vendor-advisory", "x_refsource_GENTOO", "x_transferred"], "url": "https://security.gentoo.org/glsa/202208-15"}]}]}, "cveMetadata": {"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "assignerShortName": "redhat", "cveId": "CVE-2021-20247", "datePublished": "2021-02-23T18:45:29.000Z", "dateReserved": "2020-12-17T00:00:00.000Z", "dateUpdated": "2024-08-03T17:37:23.202Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "isync/mbsync", "vendor": "n/a", "versions": [{"status": "affected", "version": "before 1.35"}, {"status": "affected", "version": "before 1.4.1"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:mbsync_project:mbsync:*:*:*:*:*:*:*:*", "matchCriteriaId": "95F34E8C-0E1E-4B6B-AD8C-3CFF03D7AB2C", "versionEndExcluding": "1.3.5", "vulnerable": true}, {"criteria": "cpe:2.3:a:mbsync_project:mbsync:*:*:*:*:*:*:*:*", "matchCriteriaId": "DD5B6CC7-2DF0-4B09-8ACD-5A26DC6D3F38", "versionEndExcluding": "1.4.1", "versionStartIncluding": "1.4.0", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:fedoraproject:extra_packages_for_enterprise_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "BB176AC3-3CDA-4DDA-9089-C67B2F73AA62", "vulnerable": true}, {"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:32:*:*:*:*:*:*:*", "matchCriteriaId": "36D96259-24BD-44E2-96D9-78CE1D41F956", "vulnerable": true}, {"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "A flaw was found in mbsync before v1.3.5 and v1.4.1. Validations of the mailbox names returned by IMAP LIST/LSUB do not occur allowing a malicious or compromised server to use specially crafted mailbox names containing '..' path components to access data outside the designated mailbox on the opposite end of the synchronization channel. The highest threat from this vulnerability is to data confidentiality and integrity."}, {"lang": "es", "value": "Se encontr\u00f3 un fallo en mbsync versiones anteriores a v1.3.5 y v1.4.1. Las comprobaciones de los nombres de buzones devueltos por IMAP LIST/LSUB no ocurren, permitiendo a un servidor malicioso o comprometido utilizar nombres de buzones especialmente dise\u00f1ados que contengan componentes de ruta \"..\" para acceder a datos fuera del buz\u00f3n designado en el extremo opuesto del canal de sincronizaci\u00f3n. La mayor amenaza de esta vulnerabilidad es la confidencialidad e integridad de los datos"}], "id": "CVE-2021-20247", "lastModified": "2026-06-17T03:33:32.533", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 5.8, "confidentialityImpact": "PARTIAL", "integrityImpact": "PARTIAL", "vectorString": "AV:N/AC:M/Au:N/C:P/I:P/A:N", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 4.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 7.4, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N", "version": "3.1"}, "exploitabilityScore": 2.2, "impactScore": 5.2, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-02-23T19:15:13.510", "references": [{"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1928963"}, {"source": "secalert@redhat.com", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2022/07/msg00001.html"}, {"source": "secalert@redhat.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CAXQLCK35QGRCRENRTGKJO4VVZGUXUJJ/"}, {"source": "secalert@redhat.com", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GVDEBZQJMWDW5JFK4NTHH6DAFNAZTESW/"}, {"source": "secalert@redhat.com", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202208-15"}, {"source": "secalert@redhat.com", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "https://www.openwall.com/lists/oss-security/2021/02/22/1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1928963"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "https://lists.debian.org/debian-lts-announce/2022/07/msg00001.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/CAXQLCK35QGRCRENRTGKJO4VVZGUXUJJ/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GVDEBZQJMWDW5JFK4NTHH6DAFNAZTESW/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://security.gentoo.org/glsa/202208-15"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Mailing List", "Third Party Advisory"], "url": "https://www.openwall.com/lists/oss-security/2021/02/22/1"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-20"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-22"}], "source": "nvd@nist.gov", "type": "Primary"}]}

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