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{"id": "CVE-2020-10967", "vendorId": null, "type": "cve", "bulletinFamily": "NVD", "title": "CVE-2020-10967", "description": "In Dovecot before 2.3.10.1, remote unauthenticated attackers can crash the lmtp or submission process by sending mail with an empty localpart.", "published": "2020-05-18T15:15:00", "modified": "2020-10-13T22:15:00", "epss": [{"cve": "CVE-2020-10967", "epss": 0.00619, "percentile": 0.75811, "modified": "2023-06-06"}], "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}, "cvss2": {"cvssV2": {"version": "2.0", "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "accessVector": "NETWORK", "accessComplexity": "LOW", "authentication": "NONE", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 5.0}, "severity": "MEDIUM", "exploitabilityScore": 10.0, "impactScore": 2.9, "acInsufInfo": false, "obtainAllPrivilege": false, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": 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["1337DAY-ID-34459"]}]}, "score": {"value": 3.7, "vector": "NONE"}, "backreferences": {"references": [{"type": "almalinux", "idList": ["ALSA-2020:4763"]}, {"type": "archlinux", "idList": ["ASA-202005-9"]}, {"type": "checkpoint_advisories", "idList": ["CPAI-2020-0492"]}, {"type": "debian", "idList": ["DEBIAN:DSA-4690-1:11B6F"]}, {"type": "debiancve", "idList": ["DEBIANCVE:CVE-2020-10967"]}, {"type": "fedora", "idList": ["FEDORA:0C9D8608A77D", "FEDORA:97A806077826", "FEDORA:A1DAC30C8E4F", "FEDORA:A3E8730E4EB0", "FEDORA:BA73E309E3CF"]}, {"type": "freebsd", "idList": ["37D106A8-15A4-483E-8247-FCB68B16EAF8"]}, {"type": "nessus", "idList": ["DEBIAN_DSA-4690.NASL", "FEDORA_2020-1DEE17D880.NASL", "FEDORA_2020-B60344C987.NASL", "FREEBSD_PKG_37D106A815A4483E8247FCB68B16EAF8.NASL", "OPENSUSE-2020-720.NASL", "ORACLELINUX_ELSA-2020-4763.NASL", "UBUNTU_USN-4361-1.NASL"]}, {"type": "openvas", "idList": ["OPENVAS:1361412562310143931", "OPENVAS:1361412562310704690", "OPENVAS:1361412562310844435", "OPENVAS:1361412562310853180", "OPENVAS:1361412562310877885", "OPENVAS:1361412562310877907"]}, {"type": "oraclelinux", "idList": ["ELSA-2020-4763"]}, {"type": "packetstorm", "idList": ["PACKETSTORM:157771"]}, {"type": "redhat", "idList": ["RHSA-2020:4763"]}, {"type": "redhatcve", "idList": ["RH:CVE-2020-10967"]}, {"type": "suse", "idList": ["OPENSUSE-SU-2020:0720-1"]}, {"type": "ubuntu", "idList": ["USN-4361-1"]}, {"type": "ubuntucve", "idList": ["UB:CVE-2020-10967"]}, {"type": "zdt", "idList": ["1337DAY-ID-34459"]}]}, "exploitation": null, "affected_software": {"major_version": [{"name": "dovecot", "version": 2}]}, "epss": [{"cve": "CVE-2020-10967", "epss": 0.00619, "percentile": 0.7572, "modified": "2023-05-07"}], "vulnersScore": 3.7}, "_state": {"dependencies": 1686070051, "score": 1686061038, "affected_software_major_version": 0, "epss": 0}, "_internal": {"score_hash": "1c2664ef924a7a0967dbad4204fbf8dc"}, "cna_cvss": {"cna": "MITRE", "cvss": {"3": {"vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "score": 5.3}}}, "cpe": [], "cpe23": [], "cwe": ["CWE-20"], "affectedSoftware": [{"cpeName": "dovecot:dovecot", "version": "2.3.10.1", "operator": "lt", "name": "dovecot"}], "affectedConfiguration": [], "cpeConfiguration": {"CVE_data_version": "4.0", "nodes": [{"operator": "OR", "children": [], "cpe_match": [{"vulnerable": true, "cpe23Uri": "cpe:2.3:a:dovecot:dovecot:2.3.10.1:*:*:*:*:*:*:*", "versionEndExcluding": "2.3.10.1", "cpe_name": []}]}]}, "extraReferences": [{"url": "https://dovecot.org/security", "name": "https://dovecot.org/security", "refsource": "MISC", "tags": ["Vendor Advisory"]}, {"url": "https://www.openwall.com/lists/oss-security/2020/05/18/1", "name": "https://www.openwall.com/lists/oss-security/2020/05/18/1", "refsource": "CONFIRM", "tags": ["Mailing List", "Third Party Advisory"]}, {"url": "http://www.openwall.com/lists/oss-security/2020/05/18/1", "name": "[oss-security] 20200518 Multiple vulnerabilities in Dovecot IMAP server", "refsource": "MLIST", "tags": ["Mailing List", "Third Party Advisory"]}, {"url": "http://seclists.org/fulldisclosure/2020/May/37", "name": "20200519 Multiple vulnerabilities in Dovecot IMAP server", "refsource": "FULLDISC", "tags": ["Exploit", "Third Party Advisory"]}, {"url": "http://packetstormsecurity.com/files/157771/Open-Xchange-Dovecot-2.3.10-Null-Pointer-Dereference-Denial-Of-Service.html", "name": "http://packetstormsecurity.com/files/157771/Open-Xchange-Dovecot-2.3.10-Null-Pointer-Dereference-Denial-Of-Service.html", "refsource": "MISC", "tags": []}, {"url": "https://www.debian.org/security/2020/dsa-4690", "name": "DSA-4690", "refsource": "DEBIAN", "tags": []}, {"url": "https://usn.ubuntu.com/4361-1/", "name": "USN-4361-1", "refsource": "UBUNTU", "tags": []}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/VVUWHUUAFPC6XGIXYFIPTNBXLHPNM4W6/", "name": "FEDORA-2020-1dee17d880", "refsource": "FEDORA", "tags": []}, {"url": "http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00059.html", "name": "openSUSE-SU-2020:0720", "refsource": "SUSE", "tags": []}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/TTZN2VW55ZC2AQBGBJMLRJSZIKSB2NS6/", "name": "FEDORA-2020-b60344c987", "refsource": "FEDORA", "tags": []}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/4AAX2MJEULPVSRZOBX3PNPFSYP4FM4TT/", "name": "FEDORA-2020-cd8b8f887b", "refsource": "FEDORA", "tags": []}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/XKKAL3OMG76ZZ7CIEMQP2K6KCTD2RAKE/", "name": "FEDORA-2020-b8ebc4201e", "refsource": "FEDORA", "tags": []}, {"url": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/EYZU6CHA3VMYYAUCMHSCCQKJEVEIKPQ2/", "name": "FEDORA-2020-d737c57172", "refsource": "FEDORA", "tags": []}], "product_info": [{"vendor": "Dovecot", "product": "Dovecot"}], "solutions": [], "workarounds": [], "impacts": [], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "exploits": [], "assigned": "1976-01-01T00:00:00"}

{"redhatcve": [{"lastseen": "2023-06-06T15:08:07", "description": "In Dovecot before 2.3.10.1, remote unauthenticated attackers can crash the lmtp or submission process by sending mail with an empty localpart.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.3, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 1.4}, "published": "2020-05-18T14:26:28", "type": "redhatcve", "title": "CVE-2020-10967", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10967"], "modified": "2023-04-06T07:20:53", "id": "RH:CVE-2020-10967", "href": "https://access.redhat.com/security/cve/cve-2020-10967", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "prion": [{"lastseen": "2023-08-16T09:03:10", "description": "In Dovecot before 2.3.10.1, remote unauthenticated attackers can crash the lmtp or submission process by sending mail with an empty localpart.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.3, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 1.4}, "published": "2020-05-18T15:15:00", "type": "prion", "title": "CVE-2020-10967", "bulletinFamily": "NVD", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10967"], "modified": "2020-10-13T22:15:00", "id": "PRION:CVE-2020-10967", "href": "https://kb.prio-n.com/vulnerability/CVE-2020-10967", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "checkpoint_advisories": [{"lastseen": "2022-02-16T19:39:12", "description": "A denial-of-service vulnerability exists in Dovecot. Successful exploitation of this vulnerability could cause a denial-of-service condition.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "LOW", "integrityImpact": "NONE", "baseScore": 5.3, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 1.4}, "published": "2020-06-17T00:00:00", "type": "checkpoint_advisories", "title": "Dovecot Denial of Service (CVE-2020-10967)", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10967"], "modified": "2020-06-17T00:00:00", "id": "CPAI-2020-0492", "href": "", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "veracode": [{"lastseen": "2022-07-26T16:40:56", "description": "Dovecot is vulnerable to denial of service (DoS). A remote unauthenticated attackers can crash the lmtp or submission process by sending mail with an empty localpart.\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.3, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 1.4}, "published": "2020-08-06T21:34:19", "type": "veracode", "title": "Denial Of Service (DoS)", "bulletinFamily": "software", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10967"], "modified": "2020-10-14T01:11:24", "id": "VERACODE:26169", "href": "https://sca.analysiscenter.veracode.com/vulnerability-database/security/1/1/sid-26169/summary", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "ubuntucve": [{"lastseen": "2023-06-07T13:56:06", "description": "In Dovecot before 2.3.10.1, remote unauthenticated attackers can crash the\nlmtp or submission process by sending mail with an empty localpart.\n\n#### Notes\n\nAuthor| Note \n---|--- \n[alexmurray](<https://launchpad.net/~alexmurray>) | According to upstream, versions from 2.3.0 to 2.3.10 are affected\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.3, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 1.4}, "published": "2020-05-18T00:00:00", "type": "ubuntucve", "title": "CVE-2020-10967", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10967"], "modified": "2020-05-18T00:00:00", "id": "UB:CVE-2020-10967", "href": "https://ubuntu.com/security/CVE-2020-10967", "cvss": 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The SQL drivers and authentication plug-ins are provided as subpackages. \n\nSecurity Fix(es):\n\n* dovecot: command followed by sufficient number of newlines leads to use-after-free (CVE-2020-10958)\n\n* dovecot: sending mail with empty quoted localpart leads to DoS (CVE-2020-10967)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.\n\nAdditional Changes:\n\nFor detailed information on changes in this release, see the Red Hat Enterprise Linux 8.3 Release Notes linked from the References section.", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 5.3, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 1.4}, "published": "2020-11-03T12:33:59", "type": "redhat", "title": "(RHSA-2020:4763) Moderate: dovecot security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10958", "CVE-2020-10967"], "modified": "2020-11-04T00:05:57", "id": "RHSA-2020:4763", "href": "https://access.redhat.com/errata/RHSA-2020:4763", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "freebsd": [{"lastseen": "2023-06-06T15:28:27", "description": "\n\nAki Tuomi reports:\n\nVulnerability Details:\n\tSending malformed NOOP command causes crash in submission, submission-login or\n\tlmtp service.\n\nRisk:\n\tRemote attacker can keep submission-login service down, causing denial of\n\tservice attack. For lmtp the risk is neglible, as lmtp is usually behind a\n\ttrusted MTA.\n\nSteps to reproduce:\n\tSend ``NOOP EE\"FY`` to submission port, or similarly malformed command.\nVulnerability Details:\n\n\tSending command followed by sufficient number of newlines triggers a\n\tuse-after-free bug that might crash submission-login, submission or\n\tlmtp service.\n\nRisk:\n\n\tRemote attacker can keep submission-login service down, causing denial\n\tof service attack. For lmtp the risk is neglible, as lmtp is usually\n\tbehind a trusted MTA.\n\nSteps to reproduce:\n\n\tThis can be currently reproduced with ASAN or Valgrind. Reliable way to\n\tcrash has not yet been discovered.\n\t\nVulnerability Details:\n\tSending mail with empty quoted localpart causes submission or lmtp component\n\tto crash.\n\nRisk:\n\tMalicious actor can cause denial of service to mail delivery by repeatedly\n\tsending mails with bad sender or recipient address.\n\nSteps to reproduce:\n\tSend mail with envelope sender or recipient as <\"\"@example.org>.\n\nWorkaround:\n\tFor submission there is no workaround, but triggering the bug requires valid\n\tcredentials.\n\tFor lmtp, one can implement sufficient filtering on MTA level to prevent mails\n\t with such addresses from ending up in LMTP delivery.\n\n\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-04-02T00:00:00", "type": "freebsd", "title": "Dovecot -- Multiple vulnerabilities", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10957", "CVE-2020-10958", "CVE-2020-10967"], "modified": "2020-04-02T00:00:00", "id": "37D106A8-15A4-483E-8247-FCB68B16EAF8", "href": "https://vuxml.freebsd.org/freebsd/37d106a8-15a4-483e-8247-fcb68b16eaf8.html", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}, {"lastseen": "2023-06-06T15:28:27", "description": "\n\nAki Tuomi reports:\n\nParsing mails with a large number of MIME parts could\n have resulted in excessive CPU usage or a crash due to running out of\n stack memory..\n\n\nDovecot's NTLM implementation does not correctly check\n message buffer size, which leads to reading past allocation which can\n\t lead to crash\n\n\nlmtp/submission: Issuing the RCPT command with an\n address that has the empty quoted string as local-part causes the lmtp\n service to crash.\n\n\nDovecot's RPA mechanism implementation accepts\n zero-length message, which leads to assert-crash later on.\n\n\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-04-23T00:00:00", "type": "freebsd", "title": "mail/dovecot -- multiple vulnerabilities", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10967", "CVE-2020-12100", "CVE-2020-12673", "CVE-2020-12674"], "modified": "2020-04-23T00:00:00", "id": "87A07DE1-E55E-4D51-BB64-8D117829A26A", "href": "https://vuxml.freebsd.org/freebsd/87a07de1-e55e-4d51-bb64-8d117829a26a.html", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "fedora": [{"lastseen": "2023-05-28T15:02:51", "description": "Dovecot is an IMAP server for Linux/UNIX-like systems, written with security primarily in mind. It also contains a small POP3 server. It supports mail in either of maildir or mbox formats. The SQL drivers and authentication plug-ins are in their subpackages. ", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-05-28T02:00:59", "type": "fedora", "title": "[SECURITY] Fedora 31 Update: dovecot-2.3.10.1-1.fc31", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10957", "CVE-2020-10958", "CVE-2020-10967"], "modified": "2020-05-28T02:00:59", "id": "FEDORA:97A806077826", "href": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/TTZN2VW55ZC2AQBGBJMLRJSZIKSB2NS6/", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}, {"lastseen": "2023-05-23T14:53:36", "description": "Dovecot is an IMAP server for Linux/UNIX-like systems, written with security primarily in mind. It also contains a small POP3 server. It supports mail in either of maildir or mbox formats. The SQL drivers and authentication plug-ins are in their subpackages. ", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-05-24T03:30:04", "type": "fedora", "title": "[SECURITY] Fedora 32 Update: dovecot-2.3.10.1-1.fc32", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10957", "CVE-2020-10958", "CVE-2020-10967"], "modified": "2020-05-24T03:30:04", "id": "FEDORA:0C9D8608A77D", "href": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/VVUWHUUAFPC6XGIXYFIPTNBXLHPNM4W6/", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}, {"lastseen": "2023-06-06T15:26:39", "description": "Dovecot is an IMAP server for Linux/UNIX-like systems, written with security primarily in mind. It also contains a small POP3 server. It supports mail in either of maildir or mbox formats. The SQL drivers and authentication plug-ins are in their subpackages. ", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-09-03T16:27:31", "type": "fedora", "title": "[SECURITY] Fedora 31 Update: dovecot-2.3.11.3-4.fc31", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10967", "CVE-2020-12100", "CVE-2020-12673", "CVE-2020-12674"], "modified": "2020-09-03T16:27:31", "id": "FEDORA:BA73E309E3CF", "href": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/4AAX2MJEULPVSRZOBX3PNPFSYP4FM4TT/", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}, {"lastseen": "2023-06-06T15:26:39", "description": "Dovecot is an IMAP server for Linux/UNIX-like systems, written with security primarily in mind. It also contains a small POP3 server. It supports mail in either of maildir or mbox formats. The SQL drivers and authentication plug-ins are in their subpackages. ", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-09-25T17:07:13", "type": "fedora", "title": "[SECURITY] Fedora 33 Update: dovecot-2.3.11.3-5.fc33", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10967", "CVE-2020-12100", "CVE-2020-12673", "CVE-2020-12674"], "modified": "2020-09-25T17:07:13", "id": "FEDORA:A1DAC30C8E4F", "href": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/XKKAL3OMG76ZZ7CIEMQP2K6KCTD2RAKE/", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}, {"lastseen": "2023-06-06T15:26:39", "description": "Dovecot is an IMAP server for Linux/UNIX-like systems, written with security primarily in mind. It also contains a small POP3 server. It supports mail in either of maildir or mbox formats. The SQL drivers and authentication plug-ins are in their subpackages. ", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-10-13T20:35:04", "type": "fedora", "title": "[SECURITY] Fedora 32 Update: dovecot-2.3.11.3-5.fc32", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10967", "CVE-2020-12100", "CVE-2020-12673", "CVE-2020-12674"], "modified": "2020-10-13T20:35:04", "id": "FEDORA:A3E8730E4EB0", "href": "https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/thread/EYZU6CHA3VMYYAUCMHSCCQKJEVEIKPQ2/", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "suse": [{"lastseen": "2022-04-18T12:41:20", "description": "An update that fixes three vulnerabilities is now available.\n\nDescription:\n\n This update for dovecot23 to 2.3.10 fixes the following issues:\n\n Security issues fixed:\n\n - CVE-2020-10957: Fixed a crash caused by malformed NOOP commands\n (bsc#1171457).\n - CVE-2020-10958: Fixed a use-after-free when receiving too many newlines\n (bsc#1171458).\n - CVE-2020-10967: Fixed a crash in the lmtp and submission components\n caused by mails with empty quoted localparts (bsc#1171456).\n\n Non-security issues fixed:\n\n - The update to 2.3.10 fixes several bugs. Please refer to\n https://dovecot.org/doc/NEWS for a complete list of changes.\n\n This update was imported from the SUSE:SLE-15-SP1:Update update project.\n\n\nPatch Instructions:\n\n To install this openSUSE Security Update use the SUSE recommended installation methods\n like YaST online_update or \"zypper patch\".\n\n Alternatively you can run the command listed for your product:\n\n - openSUSE Leap 15.1:\n\n zypper in -t patch openSUSE-2020-720=1", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-05-26T00:00:00", "type": "suse", "title": "Security update for dovecot23 (important)", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10957", "CVE-2020-10958", "CVE-2020-10967"], "modified": "2020-05-26T00:00:00", "id": "OPENSUSE-SU-2020:0720-1", "href": "https://lists.opensuse.org/archives/list/security-announce@lists.opensuse.org/thread/K3LZAKCBF64D2WQJU72IWUN4CX7LW2RI/", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "mageia": [{"lastseen": "2023-06-06T16:28:09", "description": "Dovecot has been updated to fix several security issues. Sending malformed NOOP command causes crash in submission, submission-login or lmtp service (CVE-2020-10957). Sending command followed by sufficient number of newlines triggers a use-after-free bug that might crash submission-login, submission or lmtp service (CVE-2020-10958). 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For lmtp the risk is neglible, as lmtp is usually behind a \ntrusted MTA. \n \nSteps to reproduce: \nSend ``NOOP EE\"FY`` to submission port, or similarly malformed command. \n \nSolution: \nUpgrade to fixed version. \n \n------------------ \n \nOpen-Xchange Security Advisory 2020-05-18 \n \nProduct: Dovecot IMAP server \nVendor: OX Software GmbH \n \nInternal reference: DOV-3875 \nVulnerability type: Improper handling of input data (CWE-20) \nVulnerable version: 2.3.0 - 2.3.10 \nVulnerable component: submission, lmtp \nReport confidence: Confirmed \nSolution status: Fixed by Vendor \nFixed version: 2.3.10.1 \nResearcher credits: Philippe Antoine (Catena Cyber) \nVendor notification: 2020-03-23 \nSolution date: 2020-04-02 \nPublic disclosure: 2020-05-18 \nCVE reference: CVE-2020-10958 \nCVSS: 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L) \n \nVulnerability Details: \n \nSending command followed by sufficient number of newlines triggers a \nuse-after-free bug that might crash submission-login, submission or \nlmtp service. \n \nRisk: \n \nRemote attacker can keep submission-login service down, causing denial \nof service attack. For lmtp the risk is neglible, as lmtp is usually \nbehind a trusted MTA. \n \nSteps to reproduce: \n \nThis can be currently reproduced with ASAN or Valgrind. Reliable way to \ncrash has not yet been discovered. \n \nSolution: \n \nUpgrade to fixed version. \n \n------------------ \n \nOpen-Xchange Security Advisory 2020-05-18 \n \nProduct: Dovecot \nVendor: OX Software GmbH \n \nInternal reference: DOV-1745 \nVulnerability type: Improper input validation (CWE-20) \nVulnerable version: 2.3.0 - 2.3.10 \nVulnerable component: submission, lmtp \nReport confidence: Confirmed \nSolution status: Fixed by Vendor \nFixed version: 2.3.10.1 \nResearcher credits: mailbox.org \nVendor notification: 2020-03-20 \nSolution date: 2020-04-02 \nPublic disclosure: 2020-05-18 \nCVE reference: CVE-2020-10967 \nCVSS: 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L) \n \nVulnerability Details: \nSending mail with empty quoted localpart causes submission or lmtp component \nto crash. \n \nRisk: \nMalicious actor can cause denial of service to mail delivery by repeatedly \nsending mails with bad sender or recipient address. \n \nSteps to reproduce: \nSend mail with envelope sender or recipient as ``<\"\"@example.org>``. \n \nWorkaround: \nFor submission there is no workaround, but triggering the bug requires valid \ncredentials. \nFor lmtp, one can implement sufficient filtering on MTA level to prevent mails \nwith such addresses from ending up in LMTP delivery. \n \nSolution: \nUpgrade to fixed version. \n \n------------------ \n`\n", "cvss": {"score": 0.0, "vector": "NONE"}, "sourceHref": "https://packetstormsecurity.com/files/download/157771/oxdovecot-nullpointerdos.txt"}], "altlinux": [{"lastseen": "2023-03-31T19:17:25", "description": "2.3.10.1-alt1 built May 21, 2020 Gleb Fotengauer-Malinovskiy in task #252013\n\nMay 20, 2020 Gleb Fotengauer-Malinovskiy\n \n \n - Updated to 2.3.10.1 (fixes CVE-2020-10957, CVE-2020-10958, CVE-2020-10967).\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-05-21T00:00:00", "type": "altlinux", "title": "Security fix for the ALT Linux 9 package dovecot version 2.3.10.1-alt1", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10957", "CVE-2020-10958", "CVE-2020-10967"], "modified": "2020-05-21T00:00:00", "id": "6A36B1050B6D8B79D32BD6ED20F58BFC", "href": "https://packages.altlinux.org/en/p9/srpms/dovecot/", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "zdt": [{"lastseen": "2023-06-06T17:19:27", "description": "", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-05-18T00:00:00", "type": "zdt", "title": "Open-Xchange Dovecot 2.3.10 Null Pointer Dereference / Denial Of Service Vulnerabilities", "bulletinFamily": "exploit", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10957", "CVE-2020-10958", "CVE-2020-10967"], "modified": "2020-05-18T00:00:00", "id": "1337DAY-ID-34459", "href": "https://0day.today/exploit/description/34459", "sourceData": "------------------\n\nOpen-Xchange Security Advisory 2020-05-18\n\nProduct: Dovecot\nVendor: OX Software GmbH\n\nInternal reference: DOV-3784\nVulnerability type: NULL pointer dereference (CWE-476)\nVulnerable version: 2.3.0 - 2.3.10\nVulnerable component: submission, lmtp\nReport confidence: Confirmed\nSolution status: Fixed by Vendor\nFixed version: 2.3.10.1\nResearcher credits: Philippe Antoine (Catena Cyber)\nVendor notification: 2020-03-24\nSolution date: 2020-04-02\nPublic disclosure: 2020-05-18\nCVE reference: CVE-2020-10957\nCVSS: 7.5 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)\n\nVulnerability Details:\n Sending malformed NOOP command causes crash in submission, submission-login or\n lmtp service.\n\nRisk:\n Remote attacker can keep submission-login service down, causing denial of\n service attack. For lmtp the risk is neglible, as lmtp is usually behind a\n trusted MTA.\n\nSteps to reproduce:\n Send ``NOOP EE\"FY`` to submission port, or similarly malformed command.\n\nSolution:\n Upgrade to fixed version.\n\n------------------\n\nOpen-Xchange Security Advisory 2020-05-18\n\nProduct: Dovecot IMAP server\nVendor: OX Software GmbH\n\nInternal reference: DOV-3875\nVulnerability type: Improper handling of input data (CWE-20)\nVulnerable version: 2.3.0 - 2.3.10\nVulnerable component: submission, lmtp\nReport confidence: Confirmed\nSolution status: Fixed by Vendor\nFixed version: 2.3.10.1\nResearcher credits: Philippe Antoine (Catena Cyber)\nVendor notification: 2020-03-23\nSolution date: 2020-04-02\nPublic disclosure: 2020-05-18\nCVE reference: CVE-2020-10958\nCVSS: 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)\n\nVulnerability Details:\n\n Sending command followed by sufficient number of newlines triggers a\n use-after-free bug that might crash submission-login, submission or\n lmtp service.\n\nRisk:\n\n Remote attacker can keep submission-login service down, causing denial\n of service attack. For lmtp the risk is neglible, as lmtp is usually\n behind a trusted MTA.\n\nSteps to reproduce:\n\n This can be currently reproduced with ASAN or Valgrind. Reliable way to\n crash has not yet been discovered.\n\nSolution:\n\n Upgrade to fixed version.\n\n------------------\n\nOpen-Xchange Security Advisory 2020-05-18\n\nProduct: Dovecot\nVendor: OX Software GmbH\n\nInternal reference: DOV-1745\nVulnerability type: Improper input validation (CWE-20)\nVulnerable version: 2.3.0 - 2.3.10\nVulnerable component: submission, lmtp\nReport confidence: Confirmed\nSolution status: Fixed by Vendor\nFixed version: 2.3.10.1\nResearcher credits: mailbox.org\nVendor notification: 2020-03-20\nSolution date: 2020-04-02\nPublic disclosure: 2020-05-18\nCVE reference: CVE-2020-10967\nCVSS: 5.3 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L)\n\nVulnerability Details:\n Sending mail with empty quoted localpart causes submission or lmtp component\n to crash.\n\nRisk:\n Malicious actor can cause denial of service to mail delivery by repeatedly\n sending mails with bad sender or recipient address.\n\nSteps to reproduce:\n Send mail with envelope sender or recipient as ``<\"\"@example.org>``.\n\nWorkaround:\n For submission there is no workaround, but triggering the bug requires valid\n credentials.\n For lmtp, one can implement sufficient filtering on MTA level to prevent mails\n with such addresses from ending up in LMTP delivery.\n\nSolution:\n Upgrade to fixed version.\n\n------------------\n", "sourceHref": "https://0day.today/exploit/34459", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "ubuntu": [{"lastseen": "2023-07-24T23:58:32", "description": "## Releases\n\n * Ubuntu 20.04 LTS\n * Ubuntu 19.10 \n\n## Packages\n\n * dovecot \\- IMAP and POP3 email server\n\nPhilippe Antoine discovered that Dovecot incorrectly handled certain data. \nAn attacker could possibly use this issue to cause a denial of service. \n(CVE-2020-10957, CVE-2020-10967)\n\nPhilippe Antoine discovered that Dovecot incorrectly handled certain data. \nAn attacker could possibly use this issue to cause a denial of service or execute \narbitrary code. (CVE-2020-10958)\n", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-05-18T00:00:00", "type": "ubuntu", "title": "Dovecot vulnerabilities", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10957", "CVE-2020-10958", "CVE-2020-10967"], "modified": "2020-05-18T00:00:00", "id": "USN-4361-1", "href": "https://ubuntu.com/security/notices/USN-4361-1", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "archlinux": [{"lastseen": "2023-06-06T15:10:28", "description": "Arch Linux Security Advisory ASA-202005-9\n=========================================\n\nSeverity: High\nDate : 2020-05-19\nCVE-ID : CVE-2020-10957 CVE-2020-10958 CVE-2020-10967\nPackage : dovecot\nType : multiple issues\nRemote : Yes\nLink : https://security.archlinux.org/AVG-1162\n\nSummary\n=======\n\nThe package dovecot before version 2.3.10.1-1 is vulnerable to multiple\nissues including arbitrary code execution and denial of service.\n\nResolution\n==========\n\nUpgrade to 2.3.10.1-1.\n\n# pacman -Syu \"dovecot>=2.3.10.1-1\"\n\nThe problems have been fixed upstream in version 2.3.10.1.\n\nWorkaround\n==========\n\nNone.\n\nDescription\n===========\n\n- CVE-2020-10957 (denial of service)\n\nA NULL-pointer dereference issue has been found in Dovecot before\n2.3.10.1 in the lmtp/submission component. A client can crash the\nserver by sending a NOOP command with an invalid string parameter. This\noccurs particularly for a parameter that doesn't start with a double\nquote. This applies to all SMTP services, including submission-login,\nwhich makes it possible to crash the submission service without\nauthentication.\n\n- CVE-2020-10958 (arbitrary code execution)\n\nA security issue has been found in Dovecot before 2.3.10.1 in the\nlmtp/submission component. Sending many invalid or unknown commands can\ncause the server to access freed memory, which can lead to a server\ncrash. This happens when the server closes the connection with a \"421\nToo many invalid commands\" error. The bad command limit depends on the\nservice (lmtp or submission) and varies between 10 to 20 bad commands.\n\n- CVE-2020-10967 (denial of service)\n\nA security issue has been found in Dovecot before 2.3.10.1 in the\nlmtp/submission component. An authenticated attacker could send an\ne-mail via the submission service with empty quoted localpart which\nwould cause the submission or lmtp component to crash. An\nunauthenticated attacker could send an e-mail with a bad sender or\nrecipient address, causing the e-mail to be passed to LMTP for delivery\nand then crash the LMTP component unless some kind of filtering has\nbeen set up on the MTA level.\n\nImpact\n======\n\nA remote, unauthenticated attacker can crash the server, causing a\ndenial of service. Under certain circumstances it might be possible for\na remote attacker to execute arbitrary code on the affected host.\n\nReferences\n==========\n\nhttps://dovecot.org/pipermail/dovecot-news/2020-May/000437.html\nhttps://dovecot.org/pipermail/dovecot-news/2020-May/000438.html\nhttps://github.com/dovecot/core/commit/d143ca6b7ee1196ae3eafffbf6dee71a95a5e0b8\nhttps://github.com/dovecot/core/commit/606724bd528b92347dce580d3ab48fc1e3c2f4d7\nhttps://github.com/dovecot/core/commit/aedb205c79395de77127fb7166b29b09319df23c\nhttps://github.com/dovecot/core/commit/874817b169d19a4ae51d80ad5798a396bfe90136\nhttps://github.com/dovecot/core/commit/5efeccc10beccbf8d7700adec1278f97d416cbc6\nhttps://github.com/dovecot/core/commit/2b4f1e47a4ca8a192bf3f7e944c0ad07b21b2ed1\nhttps://github.com/dovecot/core/commit/563bf21d8228a3c06c63b3f289a90ca3d0c579a4\nhttps://github.com/dovecot/core/commit/18d5837748d3eafe56e080653d5ed0b3e221be0b\nhttps://github.com/dovecot/core/commit/063462d588eaea6f266596fae5f5470792dcc98d\nhttps://github.com/dovecot/core/commit/b34002a4ca301ed94cd944ee3504287ed7e58031\nhttps://github.com/dovecot/core/commit/92d9690da195b6ceaa878ab1df6c7c31a75f63f8\nhttps://github.com/dovecot/core/commit/cbab48f174580bfb8d49321d8d336f96a231b0cd\nhttps://security.archlinux.org/CVE-2020-10957\nhttps://security.archlinux.org/CVE-2020-10958\nhttps://security.archlinux.org/CVE-2020-10967", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "NONE", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 3.6}, "published": "2020-05-19T00:00:00", "type": "archlinux", "title": "[ASA-202005-9] dovecot: multiple issues", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "impactScore": 2.9, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10957", "CVE-2020-10958", "CVE-2020-10967"], "modified": "2020-05-19T00:00:00", "id": "ASA-202005-9", "href": "https://security.archlinux.org/ASA-202005-9", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}], "oraclelinux": [{"lastseen": "2021-07-28T14:24:29", "description": "[1:2.3.8-4]\n- fix CVE-2020-12100 resource exhaustion via deeply nested MIME parts (#1866756)\n- fix CVE-2020-12673 out of bound reads in dovecot NTLM implementation (#1866761)\n- fix CVE-2020-12674 crash due to assert in RPA implementation (#1866768)\n[1:2.3.8-3]\n- fix CVE-2020-10957 dovecot: malformed NOOP commands leads to DoS (#1840354)\n- fix CVE-2020-10958 dovecot: command followed by sufficient number of newlines\n leads to use-after-free (#1840357)\n- fix CVE-2020-10967 dovecot: sending mail with empty quoted localpart\n leads to DoS (#1840356)", "cvss3": {"exploitabilityScore": 3.9, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "NONE", "attackComplexity": "LOW", "scope": "UNCHANGED", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "integrityImpact": "NONE", "baseScore": 7.5, "privilegesRequired": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H", "userInteraction": "NONE", "version": "3.1"}, "impactScore": 3.6}, "published": "2020-11-10T00:00:00", "type": "oraclelinux", "title": "dovecot security update", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 10.0, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "NONE", "availabilityImpact": "PARTIAL", "integrityImpact": "NONE", "baseScore": 5.0, "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P", "version": "2.0", "accessVector": "NETWORK", "authentication": "NONE"}, "acInsufInfo": false, "impactScore": 2.9, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10957", "CVE-2020-10958", "CVE-2020-10967", "CVE-2020-12100", "CVE-2020-12673", "CVE-2020-12674"], "modified": "2020-11-10T00:00:00", "id": "ELSA-2020-4763", "href": "http://linux.oracle.com/errata/ELSA-2020-4763.html", "cvss": {"score": 5.0, "vector": "AV:N/AC:L/Au:N/C:N/I:N/A:P"}}]}