GHSA-8CGQ-6MH2-7J6V

Vulnerability from github – Published: 2025-03-04 15:27 – Updated: 2025-11-04 16:55
VLAI?
Summary
Escape Sequence Injection vulnerability in Rack lead to Possible Log Injection
Details

Summary

Rack::Sendfile can be exploited by crafting input that includes newline characters to manipulate log entries.

Details

The Rack::Sendfile middleware logs unsanitized header values from the X-Sendfile-Type header. An attacker can exploit this by injecting escape sequences (such as newline characters) into the header, resulting in log injection.

Impact

This vulnerability can distort log files, obscure attack traces, and complicate security auditing.

Mitigation

  • Update to the latest version of Rack, or
  • Remove usage of Rack::Sendfile.
Severity ?
6.9 (Medium)
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
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{
  "affected": [
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "rack"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "2.2.12"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "rack"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.0"
            },
            {
              "fixed": "3.0.13"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    },
    {
      "package": {
        "ecosystem": "RubyGems",
        "name": "rack"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "3.1"
            },
            {
              "fixed": "3.1.11"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "aliases": [
    "CVE-2025-27111"
  ],
  "database_specific": {
    "cwe_ids": [
      "CWE-117",
      "CWE-93"
    ],
    "github_reviewed": true,
    "github_reviewed_at": "2025-03-04T15:27:06Z",
    "nvd_published_at": "2025-03-04T16:15:40Z",
    "severity": "MODERATE"
  },
  "details": "## Summary\n\n`Rack::Sendfile` can be exploited by crafting input that includes newline characters to manipulate log entries.\n\n## Details\n\nThe `Rack::Sendfile` middleware logs unsanitized header values from the `X-Sendfile-Type` header. An attacker can exploit this by injecting escape sequences (such as newline characters) into the header, resulting in log injection.\n\n## Impact\n\nThis vulnerability can distort log files, obscure attack traces, and complicate security auditing.\n\n## Mitigation\n\n- Update to the latest version of Rack, or\n- Remove usage of `Rack::Sendfile`.",
  "id": "GHSA-8cgq-6mh2-7j6v",
  "modified": "2025-11-04T16:55:18Z",
  "published": "2025-03-04T15:27:06Z",
  "references": [
    {
      "type": "WEB",
      "url": "https://github.com/rack/rack/security/advisories/GHSA-8cgq-6mh2-7j6v"
    },
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2025-27111"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rack/rack/commit/803aa221e8302719715e224f4476e438f2531a53"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rack/rack/commit/aeac570bb8080ca7b53b7f2e2f67498be7ebd30b"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rack/rack/commit/b13bc6bfc7506aca3478dc5ac1c2ec6fc53f82a3"
    },
    {
      "type": "PACKAGE",
      "url": "https://github.com/rack/rack"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2025-27111.yml"
    },
    {
      "type": "WEB",
      "url": "https://lists.debian.org/debian-lts-announce/2025/03/msg00016.html"
    }
  ],
  "schema_version": "1.4.0",
  "severity": [
    {
      "score": "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Escape Sequence Injection vulnerability in Rack lead to Possible Log Injection"
}


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  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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