FKIE_CVE-2025-61600

Vulnerability from fkie_nvd - Published: 2025-10-02 22:15 - Updated: 2026-10-12 15:10
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
Stalwart is a mail and collaboration server. Versions 0.13.3 and below contain an unbounded memory allocation vulnerability in the IMAP protocol parser which allows remote attackers to exhaust server memory, potentially triggering the system's out-of-memory (OOM) killer and causing a denial of service. The CommandParser implementation enforces size limits on its dynamic buffer in most parsing states, but several state handlers omit these validation checks. This issue is fixed in version 0.13.4. A workaround for this issue is to implement rate limiting and connection monitoring at the network level, however this does not provide complete protection.
References
security-advisories@github.comhttps://github.com/stalwartlabs/stalwart/commit/a8e631e881bded8128358732f18e02ca94a4e677
security-advisories@github.comhttps://github.com/stalwartlabs/stalwart/releases/tag/v0.13.4
security-advisories@github.comhttps://github.com/stalwartlabs/stalwart/security/advisories/GHSA-8jqj-qj5p-v5rr
Impacted products
Vendor Product Version
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "stalwart",
          "vendor": "stalwartlabs",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.13.4"
            }
          ]
        }
      ],
      "source": "security-advisories@github.com"
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Stalwart is a mail and collaboration server. Versions 0.13.3 and below contain an unbounded memory allocation vulnerability in the IMAP protocol parser which allows remote attackers to exhaust server memory, potentially triggering the system\u0027s out-of-memory (OOM) killer and causing a denial of service. The CommandParser implementation enforces size limits on its dynamic buffer in most parsing states, but several state handlers omit these validation checks. This issue is fixed in version 0.13.4. A workaround for this issue is to implement rate limiting and connection monitoring at the network level, however this does not provide complete protection."
    },
    {
      "lang": "es",
      "value": "Stalwart es un servidor de correo y colaboraci\u00f3n. Las versiones 0.13.3 e inferiores contienen una vulnerabilidad de asignaci\u00f3n de memoria ilimitada en el analizador del protocolo IMAP que permite a atacantes remotos agotar la memoria del servidor, potencialmente activando el \u0027out-of-memory (OOM) killer\u0027 del sistema y causando una denegaci\u00f3n de servicio. La implementaci\u00f3n de CommandParser aplica l\u00edmites de tama\u00f1o a su b\u00fafer din\u00e1mico en la mayor\u00eda de los estados de an\u00e1lisis, pero varios manejadores de estado omiten estas comprobaciones de validaci\u00f3n. Este problema est\u00e1 solucionado en la versi\u00f3n 0.13.4. Una soluci\u00f3n alternativa para este problema es implementar limitaci\u00f3n de velocidad y monitoreo de conexiones a nivel de red, sin embargo, esto no proporciona protecci\u00f3n completa."
    }
  ],
  "id": "CVE-2025-61600",
  "lastModified": "2026-10-12T15:10:00.207",
  "metrics": {
    "cvssMetricV31": [
      {
        "cvssData": {
          "attackComplexity": "LOW",
          "attackVector": "NETWORK",
          "availabilityImpact": "HIGH",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "privilegesRequired": "NONE",
          "scope": "UNCHANGED",
          "userInteraction": "NONE",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "version": "3.1"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6,
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-61600",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-10-03T13:39:30.035358Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-10-02T22:15:38.063",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/stalwartlabs/stalwart/commit/a8e631e881bded8128358732f18e02ca94a4e677"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/stalwartlabs/stalwart/releases/tag/v0.13.4"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/stalwartlabs/stalwart/security/advisories/GHSA-8jqj-qj5p-v5rr"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        },
        {
          "lang": "en",
          "value": "CWE-789"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Secondary"
    }
  ]
}



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