FKIE_CVE-2025-65637

Vulnerability from fkie_nvd - Published: 2025-12-04 19:16 - Updated: 2026-06-17 09:55
Severity
7.5 (High) - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
References
cve@mitre.orghttps://github.com/mjuanxd/logrus-dos-pocExploit, Third Party Advisory
cve@mitre.orghttps://github.com/mjuanxd/logrus-dos-poc/blob/main/README.mdExploit, Third Party Advisory
cve@mitre.orghttps://github.com/sirupsen/logrus/issues/1370Exploit, Issue Tracking, Patch
cve@mitre.orghttps://github.com/sirupsen/logrus/pull/1376Issue Tracking, Patch
cve@mitre.orghttps://github.com/sirupsen/logrus/releases/tag/v1.8.3Release Notes
cve@mitre.orghttps://github.com/sirupsen/logrus/releases/tag/v1.9.1Release Notes
cve@mitre.orghttps://github.com/sirupsen/logrus/releases/tag/v1.9.3Release Notes
cve@mitre.orghttps://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSIRUPSENLOGRUS-5564391Exploit, Third Party Advisory
Impacted products
Vendor Product Version
turbopuffer logrus *
turbopuffer logrus 1.9.0
turbopuffer logrus 1.9.2
To clipboard 

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "cve@mitre.org"
    }
  ],
  "configurations": [
    {
      "nodes": [
        {
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:turbopuffer:logrus:*:*:*:*:*:go:*:*",
              "matchCriteriaId": "B302F48C-A8EA-4FAB-B151-F8492365896C",
              "versionEndExcluding": "1.8.3",
              "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",
              "vulnerable": true
            }
          ],
          "negate": false,
          "operator": "OR"
        }
      ]
    }
  ],
  "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 \u003c 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."
    }
  ],
  "id": "CVE-2025-65637",
  "lastModified": "2026-06-17T09:55:50.633",
  "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": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "type": "Secondary"
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2025-65637",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "timestamp": "2025-12-05T21:52:30.561592Z",
          "version": "2.0.3"
        }
      }
    ]
  },
  "published": "2025-12-04T19:16:05.223",
  "references": [
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/mjuanxd/logrus-dos-poc"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://github.com/mjuanxd/logrus-dos-poc/blob/main/README.md"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/sirupsen/logrus/issues/1370"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Issue Tracking",
        "Patch"
      ],
      "url": "https://github.com/sirupsen/logrus/pull/1376"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/sirupsen/logrus/releases/tag/v1.8.3"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/sirupsen/logrus/releases/tag/v1.9.1"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Release Notes"
      ],
      "url": "https://github.com/sirupsen/logrus/releases/tag/v1.9.3"
    },
    {
      "source": "cve@mitre.org",
      "tags": [
        "Exploit",
        "Third Party Advisory"
      ],
      "url": "https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSIRUPSENLOGRUS-5564391"
    }
  ],
  "sourceIdentifier": "cve@mitre.org",
  "vulnStatus": "Analyzed",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ],
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
      "type": "Secondary"
    }
  ]
}



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