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CVE-2023-42114

Estado: ModificadaMedia (5.3)—

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

The specific flaw exists within the handling of NTLM challenge requests. 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 data structure. An attacker can leverage this vulnerability to disclose information in the context of the service account. . Was ZDI-CAN-17433.

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-2023-42114",
  "cveTags": [],
  "metrics": {
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          "id": "CVE-2023-42114",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
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            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2024-05-03T17:07:34.132027Z"
        }
      }
    ],
    "cvssMetricV30": [
      {
        "type": "Secondary",
        "source": "zdi-disclosures@trendmicro.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.0",
          "baseScore": 3.7,
          "attackVector": "NETWORK",
          "baseSeverity": "LOW",
          "vectorString": "CVSS:3.0/AV:N/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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        "impactScore": 1.4,
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    "cvssMetricV31": [
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  "published": "2024-05-03T03:15:49.923",
  "references": [
    {
      "url": "https://www.zerodayinitiative.com/advisories/ZDI-23-1468/",
      "tags": [
        "Third Party Advisory"
      ],
      "source": "zdi-disclosures@trendmicro.com"
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    {
      "url": "https://lists.debian.org/debian-lts-announce/2023/10/msg00002.html",
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  "vulnStatus": "Modified",
  "weaknesses": [
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      "type": "Secondary",
      "source": "zdi-disclosures@trendmicro.com",
      "description": [
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          "value": "CWE-125"
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Exim NTLM Challenge Out-Of-Bounds Read Information Disclosure Vulnerability. This vulnerability allows remote 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 handling of NTLM challenge requests. 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 data structure. An attacker can leverage this vulnerability to disclose information in the context of the service account.\n. Was ZDI-CAN-17433."
    },
    {
      "lang": "es",
      "value": "Vulnerabilidad de divulgación de información de lectura fuera de los límites del desafío Exim NTLM. Esta vulnerabilidad permite a atacantes remotos revelar información confidencial sobre las instalaciones afectadas de Exim. No se requiere autenticación para aprovechar esta vulnerabilidad. La falla específica existe en el manejo de solicitudes de desafío NTLM. 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 una estructura de datos asignada. Un atacante puede aprovechar esta vulnerabilidad para revelar información en el contexto de la cuenta de servicio. Era ZDI-CAN-17433."
    }
  ],
  "lastModified": "2026-06-17T06:23:28.937",
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  "sourceIdentifier": "zdi-disclosures@trendmicro.com"
}