ghsa-4f99-4q7p-p3gh
Vulnerability from github
Published
2025-12-04 21:31
Modified
2025-12-05 02:27
Severity ?
8.7 (High) - CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
Logrus is vulnerable to DoS when using Entry.Writer()
Details

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.

Show details on source website

To clipboard 

{
  "affected": [
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/sirupsen/logrus"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "1.8.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/sirupsen/logrus"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.9.0"
            },
            {
              "fixed": "1.9.1"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9.0"
      ]
    },
    {
      "package": {
        "ecosystem": "Go",
        "name": "github.com/sirupsen/logrus"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "1.9.2"
            },
            {
              "fixed": "1.9.3"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ],
      "versions": [
        "1.9.2"
      ]
    }
  ],
  "aliases": [
    "CVE-2025-65637"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-400"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-12-05T02:27:47Z",
    "nvd_published_at": "2025-12-04T19:16:05Z",
    "severity": "HIGH"
  },
  "details": "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": "GHSA-4f99-4q7p-p3gh",
  "modified": "2025-12-05T02:27:47Z",
  "published": "2025-12-04T21:31:04Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-65637"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sirupsen/logrus/issues/1370"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sirupsen/logrus/pull/1376"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sirupsen/logrus/commit/6acd903758687c4a3db3c11701e6c414fcf1c1f7"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mjuanxd/logrus-dos-poc"
    },
    {
      "type": "WEB",
      "url": "https://github.com/mjuanxd/logrus-dos-poc/blob/main/README.md"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/sirupsen/logrus"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sirupsen/logrus/releases/tag/v1.8.3"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sirupsen/logrus/releases/tag/v1.9.1"
    },
    {
      "type": "WEB",
      "url": "https://github.com/sirupsen/logrus/releases/tag/v1.9.3"
    },
    {
      "type": "WEB",
      "url": "https://security.snyk.io/vuln/SNYK-GOLANG-GITHUBCOMSIRUPSENLOGRUS-5564391"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Logrus is vulnerable to DoS when using Entry.Writer()"
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
  • Confirmed: The vulnerability is confirmed from an analyst perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
  • Patched: This vulnerability was successfully patched by the user reporting the sighting.
  • Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
  • Not confirmed: The user expresses doubt about the veracity of the vulnerability.
  • Not patched: This vulnerability was not successfully patched by the user reporting the sighting.