{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"cveId": "CVE-2023-42118", "assignerOrgId": "99f1926a-a320-47d8-bbb5-42feb611262e", "state": "PUBLISHED", "assignerShortName": "zdi", "dateReserved": "2023-09-06T21:14:24.436Z", "datePublished": "2024-05-03T02:13:26.055Z", "dateUpdated": "2024-09-18T18:30:11.548Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "99f1926a-a320-47d8-bbb5-42feb611262e", "shortName": "zdi", "dateUpdated": "2024-09-18T18:30:11.548Z"}, "title": "Exim libspf2 Integer Underflow Remote Code Execution Vulnerability", "descriptions": [{"lang": "en", "value": "Exim libspf2 Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Exim libspf2. Authentication is not required to exploit this vulnerability. \n\nThe specific flaw exists within the parsing of SPF macros. When parsing SPF macros, the process does not properly validate user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the service account.\n. Was ZDI-CAN-17578."}], "affected": [{"vendor": "Exim", "product": "libspf2", "versions": [{"version": "exim 4.96-RC0-14-24b8ed847-XX", "status": "affected"}], "defaultStatus": "unknown"}], "problemTypes": [{"descriptions": [{"lang": "en", "cweId": "CWE-191", "description": "CWE-191: Integer Underflow (Wrap or Wraparound)", "type": "CWE"}]}], "references": [{"url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1472/", "name": "ZDI-23-1472", "tags": ["x_research-advisory"]}], "dateAssigned": "2023-09-06T16:25:45.475-05:00", "datePublic": "2023-09-27T17:21:14.249-05:00", "source": {"lang": "en", "value": "Anonymous"}, "metrics": [{"format": "CVSS", "cvssV3_0": {"version": "3.0", "vectorString": "CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "baseScore": 7.5, "baseSeverity": "HIGH"}}]}, "adp": [{"affected": [{"vendor": "exim", "product": "libspf2", "cpes": ["cpe:2.3:a:exim:libspf2:*:*:*:*:*:*:*:*"], "defaultStatus": "unknown", "versions": [{"version": "0", "status": "affected", "lessThan": "*", "versionType": "custom"}]}], "metrics": [{"other": {"type": "ssvc", "content": {"timestamp": "2024-07-03T14:45:10.464774Z", "id": "CVE-2023-42118", "options": [{"Exploitation": "none"}, {"Automatable": "no"}, {"Technical Impact": "total"}], "role": "CISA Coordinator", "version": "2.0.3"}}}], "title": "CISA ADP Vulnrichment", "providerMetadata": {"orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "shortName": "CISA-ADP", "dateUpdated": "2024-07-03T20:58:33.989Z"}}, {"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-02T19:16:50.405Z"}, "title": "CVE Program Container", "references": [{"url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1472/", "name": "ZDI-23-1472", "tags": ["x_research-advisory", "x_transferred"]}]}]}}

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{"descriptions": [{"lang": "en", "value": "Exim libspf2 Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Exim libspf2. Authentication is not required to exploit this vulnerability. \n\nThe specific flaw exists within the parsing of SPF macros. When parsing SPF macros, the process does not properly validate user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the service account.\n. Was ZDI-CAN-17578."}, {"lang": "es", "value": "Vulnerabilidad de ejecuci\u00f3n remota de c\u00f3digo de desbordamiento de enteros Exim libspf2. Esta vulnerabilidad permite a atacantes adyacentes a la red ejecutar c\u00f3digo arbitrario en instalaciones afectadas de Exim libspf2. No se requiere autenticaci\u00f3n para aprovechar esta vulnerabilidad. La falla espec\u00edfica existe en el an\u00e1lisis de las macros SPF. Al analizar macros SPF, el proceso no valida adecuadamente los datos proporcionados por el usuario, lo que puede provocar un desbordamiento insuficiente de enteros antes de escribir en la memoria. Un atacante puede aprovechar esta vulnerabilidad para ejecutar c\u00f3digo en el contexto de la cuenta de servicio. Era ZDI-CAN-17578."}], "id": "CVE-2023-42118", "lastModified": "2024-11-21T08:22:18.683", "metrics": {"cvssMetricV30": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "ADJACENT_NETWORK", "availabilityImpact": "HIGH", "baseScore": 7.5, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0"}, "exploitabilityScore": 1.6, "impactScore": 5.9, "source": "zdi-disclosures@trendmicro.com", "type": "Secondary"}]}, "published": "2024-05-03T03:15:50.643", "references": [{"source": "zdi-disclosures@trendmicro.com", "url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1472/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1472/"}], "sourceIdentifier": "zdi-disclosures@trendmicro.com", "vulnStatus": "Awaiting Analysis", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-191"}], "source": "zdi-disclosures@trendmicro.com", "type": "Secondary"}]}

{"bugzilla": {"description": "libspf2: Integer Underflow Remote Code Execution Vulnerability", "id": "2241535", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2241535"}, "csaw": false, "cvss3": {"cvss3_base_score": "7.5", "cvss3_scoring_vector": "CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-190", "details": ["Exim libspf2 Integer Underflow Remote Code Execution Vulnerability. This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of Exim libspf2. Authentication is not required to exploit this vulnerability. \nThe specific flaw exists within the parsing of SPF macros. When parsing SPF macros, the process does not properly validate user-supplied data, which can result in an integer underflow before writing to memory. An attacker can leverage this vulnerability to execute code in the context of the service account.\n. Was ZDI-CAN-17578.", "An integer underflow flaw was discovered in libspf2 library which exists within the parsing of SPF macros. When parsing SPF macros, the process does not properly validate user-supplied data, which can result in an integer underflow before writing to memory. This vulnerability allows network-adjacent unprivileged attackers to execute code in the context of the service account."], "name": "CVE-2023-42118", "public_date": "2023-09-27T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2023-42118\nhttps://nvd.nist.gov/vuln/detail/CVE-2023-42118"], "statement": "The vulnerable package libspf2 is not shipped in any Red Hat products.", "threat_severity": "Important"}