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CVE-2021-44143

Estado: ModificadaCrítica (9.8)—

A flaw was found in mbsync in isync 1.4.0 through 1.4.3. Due to an unchecked condition, a malicious or compromised IMAP server could use a crafted mail message that lacks headers (i.e., one that starts with an empty line) to provoke a heap overflow, which could conceivably be exploited for remote code execution.

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 (3)

Debian — Debian LinuxFedoraproject — FedoraIsync Project — Isync

CWE

Referencias

JSON original (NVD)

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  "id": "CVE-2021-44143",
  "cveTags": [],
  "metrics": {
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        "source": "nvd@nist.gov",
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          "vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
          "authentication": "NONE",
          "integrityImpact": "PARTIAL",
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  "published": "2021-11-22T20:15:18.223",
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      "value": "A flaw was found in mbsync in isync 1.4.0 through 1.4.3. Due to an unchecked condition, a malicious or compromised IMAP server could use a crafted mail message that lacks headers (i.e., one that starts with an empty line) to provoke a heap overflow, which could conceivably be exploited for remote code execution."
    },
    {
      "lang": "es",
      "value": "Se ha encontrado un fallo en mbsync en isync versiones 1.4.0 hasta 1.4.3. Debido a una condición no comprobada, un servidor IMAP malicioso o comprometido podría usar un mensaje de correo diseñado que carece de encabezados (es decir, uno que comienza con una línea vacía) para provocar un desbordamiento de la pila, que podría ser explotado para una ejecución de código remota"
    }
  ],
  "lastModified": "2026-06-17T04:11:56.860",
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}