CVE-2025-65637

{
  "id": "CVE-2025-65637",
  "sourceIdentifier": "[email protected]",
  "published": "2025-12-04T19:16:05.223",
  "lastModified": "2026-11-04T22:10:00.210",
  "vulnStatus": "Analyzed",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "A denial-of-service vulnerability exists in github.com/sirupsen/logrus when using Entry.Writer() to log a single-line payload larger than 64KB without newline characters. Due to limitations in the internal bufio.Scanner, the read fails with \"token too long\" and the writer pipe is closed, leaving Writer() unusable and causing application unavailability (DoS). This affects versions < 1.8.3, 1.9.0, and 1.9.2. The issue is fixed in 1.8.3, 1.9.1, and 1.9.3+, where the input is chunked and the writer continues to function even if an error is logged."
    },
    {
      "lang": "es",
      "value": "Una vulnerabilidad de denegación de servicio existe en github.com/sirupsen/logrus al usar Entry.Writer() para registrar una carga útil de una sola línea mayor de 64KB sin caracteres de nueva línea. Debido a limitaciones en el bufio.Scanner interno, la lectura falla con ’token too long’ y la tubería del escritor se cierra, dejando a Writer() inutilizable y causando indisponibilidad de la aplicación (DoS). Esto afecta a las versiones < 1.8.3, 1.9.0 y 1.9.2. El problema se corrige en 1.8.3, 1.9.1 y 1.9.3+, donde la entrada se divide en fragmentos y el escritor sigue funcionando incluso si se registra un error."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "version": "n/a",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "baseScore": 7.5,
          "baseSeverity": "HIGH",
          "attackVector": "NETWORK",
          "attackComplexity": "LOW",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "HIGH"
        },
        "exploitabilityScore": 3.9,
        "impactScore": 3.6
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2025-12-05T21:52:30.561592Z",
          "id": "CVE-2025-65637",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "operator": "OR",
          "negate": false,
          "cpeMatch": [
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:turbopuffer:logrus:*:*:*:*:*:go:*:*",
              "versionEndExcluding": "1.8.3",
              "matchCriteriaId": "B302F48C-A8EA-4FAB-B151-F8492365896C"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:turbopuffer:logrus:1.9.0:*:*:*:*:go:*:*",
              "matchCriteriaId": "25373732-88E0-4824-B243-9C1E82608B1C"
            },
            {
              "vulnerable": true,
              "criteria": "cpe:2.3:a:turbopuffer:logrus:1.9.2:*:*:*:*:go:*:*",
              "matchCriteriaId": "E59CDE4C-3669-4EA6-AA2D-9BE99FDEC497"
            }
          ]
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/mjuanxd/logrus-dos-poc",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://github.com/mjuanxd/logrus-dos-poc/blob/main/README.md",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    },
    {
      "url": "https://github.com/sirupsen/logrus/issues/1370",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/sirupsen/logrus/pull/1376",
      "source": "[email protected]",
      "tags": [
        "Issue Tracking",
        "Patch"
      ]
    },
    {
      "url": "https://github.com/sirupsen/logrus/releases/tag/v1.8.3",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/sirupsen/logrus/releases/tag/v1.9.1",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://github.com/sirupsen/logrus/releases/tag/v1.9.3",
      "source": "[email protected]",
      "tags": [
        "Release Notes"
      ]
    },
    {
      "url": "https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSIRUPSENLOGRUS-5564391",
      "source": "[email protected]",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ]
    }
  ]
}