{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2023-42117", "assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e", "state": "PUBLISHED", "assignerShortName": "zdi", "dateReserved": "2023-09-06T21:14:24.436Z", "datePublished": "2024-05-03T02:13:25.385Z", "dateUpdated": "2025-11-03T21:49:32.300Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "99f1926a-a320-47d8-bbb5-42feb611262e", "shortName": "zdi", "dateUpdated": "2024-05-03T02:13:25.385Z"}, "title": "Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability", "descriptions": [{"lang": "en", "value": "Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability.\n\nThe specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-17554."}], "affected": [{"vendor": "Exim", "product": "Exim", "versions": [{"version": "4.96-RC1-11-315206fbf", "status": "affected"}], "defaultStatus": "unknown"}], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-138", "description": "CWE-138: Improper Neutralization of Special Elements", "type": "CWE"}]}], "references": [{"url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1471/", "name": "ZDI-23-1471", "tags": ["x_research-advisory"]}], "dateAssigned": "2023-09-06T21:25:45.470Z", "datePublic": "2023-09-27T22:21:09.875Z", "source": {"lang": "en", "value": "Anonymous"}, "metrics": [{"format": "CVSS", "cvssV3_0": {"version": "3.0", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 8.1, "baseSeverity": "HIGH"}}]}, "adp": [{"title": "CISA ADP Vulnrichment", "metrics": [{"other": {"type": "ssvc", "content": {"id": "CVE-2023-42117", "role": "CISA Coordinator", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "version": "2.0.3", "timestamp": "2024-05-03T16:58:53.804935Z"}}}], "affected": [{"cpes": ["cpe:2.3:a:exim:exim:-:*:*:*:*:*:*:*"], "vendor": "exim", "product": "exim", "versions": [{"status": "affected", "version": "-"}], "defaultStatus": "unknown"}], "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-06-04T17:25:23.895Z"}}, {"title": "CVE Program Container", "references": [{"url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1471/", "name": "ZDI-23-1471", "tags": ["x_research-advisory", "x_transferred"]}, {"url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00029.html"}], "providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2025-11-03T21:49:32.300Z"}}]}}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:exim:exim:*:*:*:*:*:*:*:*", "matchCriteriaId": "50C12C49-11A7-4EFF-AB7F-97B4F637C947", "versionEndExcluding": "4.96.2", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability.\n\nThe specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-17554."}, {"lang": "es", "value": "Vulnerabilidad de ejecuci\u00f3n remota de c\u00f3digo de neutralizaci\u00f3n inadecuada de elementos especiales de Exim. Esta vulnerabilidad permite a atacantes remotos ejecutar c\u00f3digo arbitrario en las instalaciones afectadas de Exim. No se requiere autenticaci\u00f3n para aprovechar esta vulnerabilidad. La falla espec\u00edfica existe dentro del servicio smtp, que escucha en el puerto TCP 25 de forma predeterminada. El problema se debe a la falta de validaci\u00f3n adecuada de los datos proporcionados por el usuario, lo que puede provocar una condici\u00f3n de corrupci\u00f3n de la memoria. Un atacante puede aprovechar esta vulnerabilidad para ejecutar c\u00f3digo en el contexto del proceso actual. Era ZDI-CAN-17554."}], "id": "CVE-2023-42117", "lastModified": "2025-11-03T22:16:26.683", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.1, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 2.2, "impactScore": 5.9, "source": "zdi-disclosures@trendmicro.com", "type": "Secondary"}], "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": "2024-05-03T03:15:50.463", "references": [{"source": "zdi-disclosures@trendmicro.com", "tags": ["Third Party Advisory"], "url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1471/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://lists.debian.org/debian-lts-announce/2024/10/msg00029.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1471/"}], "sourceIdentifier": "zdi-disclosures@trendmicro.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-138"}], "source": "zdi-disclosures@trendmicro.com", "type": "Secondary"}]}

{"bugzilla": {"description": "Exim: Improper Neutralization of Special Elements Remote Code Execution Vulnerability", "id": "2241531", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2241531"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.1", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-77", "details": ["Exim Improper Neutralization of Special Elements Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Exim. Authentication is not required to exploit this vulnerability.\nThe specific flaw exists within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-17554.", "The vulnerability was found in Exim within the smtp service, which listens on TCP port 25 by default. The issue results from the lack of proper validation of user-supplied data, which can result in a memory corruption condition. An attacker can leverage this vulnerability to execute code in the context of the current process. Authentication is not required to exploit this vulnerability."], "name": "CVE-2023-42117", "public_date": "2023-09-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-42117"], "statement": "The vulnerable package Exim is not shipped in any Red Hat products.", "threat_severity": "Important"}

{}