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CVE-2023-42119

Estado: ModificadaBaja (3.1)—

Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information on affected installations of Exim. Authentication is not required to exploit this vulnerability.

The 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 read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the service account. . Was ZDI-CAN-17643.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

Tecnologías afectadas (1)

Exim — Exim

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2023-42119",
  "cveTags": [],
  "metrics": {
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          "id": "CVE-2023-42119",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
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              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
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          "version": "2.0.3",
          "timestamp": "2024-07-05T16:29:47.287691Z"
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    "cvssMetricV30": [
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        "cvssData": {
          "scope": "UNCHANGED",
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          "baseScore": 3.1,
          "attackVector": "ADJACENT_NETWORK",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.0/AV:A/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
          "availabilityImpact": "NONE",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "LOW"
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  "affected": [
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      "affectedData": [
        {
          "vendor": "Exim",
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  "published": "2024-05-03T03:15:50.803",
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      "tags": [
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      "description": [
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          "value": "CWE-125"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Exim dnsdb Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows network-adjacent attackers to disclose sensitive information 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 read past the end of an allocated buffer. An attacker can leverage this in conjunction with other vulnerabilities to execute arbitrary code in the context of the service account.\n. Was ZDI-CAN-17643."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de divulgación de información de lectura fuera de los límites de Exim dnsdb. Esta vulnerabilidad permite a atacantes adyacentes a la red revelar información confidencial sobre las instalaciones afectadas de Exim. No se requiere autenticación para aprovechar esta vulnerabilidad. La falla específica existe dentro del servicio smtp, que escucha en el puerto TCP 25 de forma predeterminada. El problema se debe a la falta de una validación adecuada de los datos proporcionados por el usuario, lo que puede provocar una lectura más allá del final de un búfer asignado. Un atacante puede aprovechar esto junto con otras vulnerabilidades para ejecutar código arbitrario en el contexto de la cuenta de servicio. Era ZDI-CAN-17643."
    }
  ],
  "lastModified": "2026-06-17T06:23:30.133",
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  "sourceIdentifier": "zdi-disclosures@trendmicro.com"
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