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CVE-2023-42116

Estado: ModificadaCrítica (9.8)—

Exim SMTP Challenge Stack-based Buffer Overflow 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.

The specific flaw exists within the handling of NTLM challenge requests. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the service account. . Was ZDI-CAN-17515.

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-2023-42116",
  "cveTags": [],
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          "options": [
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              "exploitation": "none"
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              "automatable": "no"
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            {
              "technicalImpact": "total"
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          "version": "2.0.3",
          "timestamp": "2024-07-05T15:02:42.925012Z"
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    "cvssMetricV30": [
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          "userInteraction": "NONE",
          "attackComplexity": "HIGH",
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  "published": "2024-05-03T03:15:50.303",
  "references": [
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      "tags": [
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      "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",
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      "description": [
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          "value": "CWE-121"
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  "descriptions": [
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      "lang": "en",
      "value": "Exim SMTP Challenge Stack-based Buffer Overflow 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 handling of NTLM challenge requests. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of the service account.\n. Was ZDI-CAN-17515."
    },
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      "lang": "es",
      "value": "Vulnerabilidad de ejecución remota de código de desbordamiento de búfer en la región stack de la memoria del desafío SMTP de Exim. Esta vulnerabilidad permite a atacantes remotos ejecutar código arbitrario en 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 la longitud de los datos proporcionados por el usuario antes de copiarlos en un búfer basado en pila de longitud fija. Un atacante puede aprovechar esta vulnerabilidad para ejecutar código en el contexto de la cuenta de servicio. Era ZDI-CAN-17515."
    }
  ],
  "lastModified": "2026-06-17T06:23:29.733",
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