{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "2017-11-25T00:00:00", "descriptions": [{"lang": "en", "value": "The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-05-04T17:06:35", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"name": "1039872", "tags": ["vdb-entry", "x_refsource_SECTRACK"], "url": "http://www.securitytracker.com/id/1039872"}, {"tags": ["x_refsource_MISC"], "url": "https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html"}, {"tags": ["x_refsource_MISC"], "url": "https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde"}, {"tags": ["x_refsource_MISC"], "url": "http://openwall.com/lists/oss-security/2017/11/25/3"}, {"tags": ["x_refsource_MISC"], "url": "https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944"}, {"tags": ["x_refsource_MISC"], "url": "http://openwall.com/lists/oss-security/2017/11/25/1"}, {"tags": ["x_refsource_MISC"], "url": "https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4"}, {"tags": ["x_refsource_MISC"], "url": "http://openwall.com/lists/oss-security/2017/11/25/2"}, {"name": "DSA-4053", "tags": ["vendor-advisory", "x_refsource_DEBIAN"], "url": "https://www.debian.org/security/2017/dsa-4053"}, {"tags": ["x_refsource_MISC"], "url": "https://bugs.exim.org/show_bug.cgi?id=2199"}, {"name": "[oss-security] 20210504 21Nails: Multiple vulnerabilities in Exim", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "http://www.openwall.com/lists/oss-security/2021/05/04/7"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2017-16943", "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": "The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "1039872", "refsource": "SECTRACK", "url": "http://www.securitytracker.com/id/1039872"}, {"name": "https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html", "refsource": "MISC", "url": "https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html"}, {"name": "https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde", "refsource": "MISC", "url": "https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde"}, {"name": "http://openwall.com/lists/oss-security/2017/11/25/3", "refsource": "MISC", "url": "http://openwall.com/lists/oss-security/2017/11/25/3"}, {"name": "https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944", "refsource": "MISC", "url": "https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944"}, {"name": "http://openwall.com/lists/oss-security/2017/11/25/1", "refsource": "MISC", "url": "http://openwall.com/lists/oss-security/2017/11/25/1"}, {"name": "https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4", "refsource": "MISC", "url": "https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4"}, {"name": "http://openwall.com/lists/oss-security/2017/11/25/2", "refsource": "MISC", "url": "http://openwall.com/lists/oss-security/2017/11/25/2"}, {"name": "DSA-4053", "refsource": "DEBIAN", "url": "https://www.debian.org/security/2017/dsa-4053"}, {"name": "https://bugs.exim.org/show_bug.cgi?id=2199", "refsource": "MISC", "url": "https://bugs.exim.org/show_bug.cgi?id=2199"}, {"name": "[oss-security] 20210504 21Nails: Multiple vulnerabilities in Exim", "refsource": "MLIST", "url": "http://www.openwall.com/lists/oss-security/2021/05/04/7"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T20:43:59.963Z"}, "title": "CVE Program Container", "references": [{"name": "1039872", "tags": ["vdb-entry", "x_refsource_SECTRACK", "x_transferred"], "url": "http://www.securitytracker.com/id/1039872"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "http://openwall.com/lists/oss-security/2017/11/25/3"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "http://openwall.com/lists/oss-security/2017/11/25/1"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "http://openwall.com/lists/oss-security/2017/11/25/2"}, {"name": "DSA-4053", "tags": ["vendor-advisory", "x_refsource_DEBIAN", "x_transferred"], "url": "https://www.debian.org/security/2017/dsa-4053"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://bugs.exim.org/show_bug.cgi?id=2199"}, {"name": "[oss-security] 20210504 21Nails: Multiple vulnerabilities in Exim", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2021/05/04/7"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2017-16943", "datePublished": "2017-11-25T17:00:00", "dateReserved": "2017-11-25T00:00:00", "dateUpdated": "2024-08-05T20:43:59.963Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:exim:exim:4.88:-:*:*:*:*:*:*", "matchCriteriaId": "144B3769-7408-4C7C-94EB-108CD2B238E4", "vulnerable": true}, {"criteria": "cpe:2.3:a:exim:exim:4.89:-:*:*:*:*:*:*", "matchCriteriaId": "9B52AB04-BA19-42D7-811E-61BBABD0735F", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:debian:debian_linux:9.0:*:*:*:*:*:*:*", "matchCriteriaId": "DEECE5FC-CACF-4496-A3E7-164736409252", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands."}, {"lang": "es", "value": "La funci\u00f3n receive_msg en receive.c en el demonio SMTP en Exim 4.88 y 4.89 permite que atacantes remotos ejecuten c\u00f3digo arbitrario o provoquen una denegaci\u00f3n de servicio (uso de memoria previamente liberada) mediante vectores relacionados con comandos BDAT."}], "id": "CVE-2017-16943", "lastModified": "2025-04-20T01:37:25.860", "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": false}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 9.8, "baseSeverity": "CRITICAL", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 3.9, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2017-11-25T17:29:00.260", "references": [{"source": "cve@mitre.org", "tags": ["Mailing List"], "url": "http://openwall.com/lists/oss-security/2017/11/25/1"}, {"source": "cve@mitre.org", "tags": ["Mailing List"], "url": "http://openwall.com/lists/oss-security/2017/11/25/2"}, {"source": "cve@mitre.org", "tags": ["Mailing List"], "url": "http://openwall.com/lists/oss-security/2017/11/25/3"}, {"source": "cve@mitre.org", "url": "http://www.openwall.com/lists/oss-security/2021/05/04/7"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id/1039872"}, {"source": "cve@mitre.org", "tags": ["Exploit", "Issue Tracking"], "url": "https://bugs.exim.org/show_bug.cgi?id=2199"}, {"source": "cve@mitre.org", "tags": ["Patch"], "url": "https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde"}, {"source": "cve@mitre.org", "tags": ["Patch"], "url": "https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4"}, {"source": "cve@mitre.org", "tags": ["Exploit"], "url": "https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944"}, {"source": "cve@mitre.org", "tags": ["Mailing List"], "url": "https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2017/dsa-4053"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "http://openwall.com/lists/oss-security/2017/11/25/1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "http://openwall.com/lists/oss-security/2017/11/25/2"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "http://openwall.com/lists/oss-security/2017/11/25/3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2021/05/04/7"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securitytracker.com/id/1039872"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking"], "url": "https://bugs.exim.org/show_bug.cgi?id=2199"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.exim.org/exim.git/commit/4090d62a4b25782129cc1643596dc2f6e8f63bde"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.exim.org/exim.git/commitdiff/4e6ae6235c68de243b1c2419027472d7659aa2b4"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit"], "url": "https://github.com/LetUsFsck/PoC-Exploit-Mirror/tree/master/CVE-2017-16944"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "https://lists.exim.org/lurker/message/20171125.034842.d1d75cac.en.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2017/dsa-4053"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Deferred", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-416"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "exim: use-after-free in receive_msg function via vectors involving BDAT commands", "id": "1517680", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1517680"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.8", "cvss3_scoring_vector": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-416", "details": ["The receive_msg function in receive.c in the SMTP daemon in Exim 4.88 and 4.89 allows remote attackers to execute arbitrary code or cause a denial of service (use-after-free) via vectors involving BDAT commands."], "mitigation": {"lang": "en:us", "value": "if you are running Exim 4.88 or newer, then in the main section of your Exim configuration, set:\nchunking_advertise_hosts =\nThis disables advertising the ESMTP CHUNKING extension, making the BDAT verb unavailable and avoids letting an attacker apply the logic."}, "name": "CVE-2017-16943", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "exim", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2017-11-23T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2017-16943\nhttps://nvd.nist.gov/vuln/detail/CVE-2017-16943"], "threat_severity": "Critical"}