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CVE-2026-43618

Estado: ModificadaMedia (6.1)—

Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended buffer bounds. Attackers can exploit this vulnerability to disclose process memory contents including environment variables, passwords, heap and stack data, and library memory pointers, significantly reducing ASLR effectiveness and facilitating further exploitation.

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)

Samba — Rsync

CWE

Referencias

JSON original (NVD)

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  "weaknesses": [
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      "description": [
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          "lang": "en",
          "value": "CWE-125"
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        {
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          "value": "CWE-190"
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      "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
      "description": [
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          "value": "CWE-190"
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      ]
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  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Rsync version 3.4.2 and prior contain an integer overflow vulnerability in the compressed-token decoder where a 32-bit signed counter is not checked for overflow, allowing a malicious sender to trigger an overflow that causes the receiver process to read and return data from outside the intended buffer bounds. Attackers can exploit this vulnerability to disclose process memory contents including environment variables, passwords, heap and stack data, and library memory pointers, significantly reducing ASLR effectiveness and facilitating further exploitation."
    },
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      "lang": "es",
      "value": "La versión 3.4.2 de Rsync y anteriores contienen una vulnerabilidad de desbordamiento de entero en el decodificador de tokens comprimidos, donde un contador firmado de 32 bits no se verifica para desbordamiento, lo que permite a un remitente malicioso activar un desbordamiento que hace que el proceso receptor lea y devuelva datos de fuera de los límites del búfer previstos. Los atacantes pueden explotar esta vulnerabilidad para divulgar el contenido de la memoria del proceso, incluyendo variables de entorno, contraseñas, datos de heap y stack, y punteros de memoria de biblioteca, reduciendo significativamente la efectividad de ASLR y facilitando una explotación posterior."
    }
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  "lastModified": "2026-09-01T13:19:32.533",
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