BREW-MAILCATCHER-CVE-2012-6109 (GHSA-H77X-M5Q8-C29H)

Vulnerability from osv_homebrew – Published: 2026-08-13 17:11 – Updated: 2026-09-04 09:28 – Source website
VLAI
Summary
Rack vulnerable to REDoS
Details

lib/rack/multipart.rb in Rack before 1.1.4, 1.2.x before 1.2.6, 1.3.x before 1.3.7, and 1.4.x before 1.4.2 uses an incorrect regular expression, which allows remote attackers to cause a denial of service (infinite loop) via a crafted Content-Disposion header.

References
To clipboard 

{
  "affected": [
    {
      "ecosystem_specific": {
        "fix": "bump",
        "range_state": "fixed",
        "resource": "rack",
        "resource_purl": "pkg:gem/rack@3.2.7",
        "upstream_fixed_in": "1.4.2"
      },
      "package": {
        "ecosystem": "Homebrew",
        "name": "mailcatcher",
        "purl": "pkg:brew/mailcatcher"
      },
      "ranges": [
        {
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "0.10.0_2"
            }
          ],
          "type": "ECOSYSTEM"
        }
      ]
    }
  ],
  "database_specific": {
    "confidence": "high",
    "source": "matched",
    "strategy": "registry",
    "upstream_evidence": [
      {
        "ecosystem": "RubyGems",
        "key": "pkg:gem/rack@3.2.7",
        "name": "rack",
        "resource": "rack",
        "strategy": "registry",
        "subject_version": "3.2.7"
      }
    ]
  },
  "details": "`lib/rack/multipart.rb` in Rack before 1.1.4, 1.2.x before 1.2.6, 1.3.x before 1.3.7, and 1.4.x before 1.4.2 uses an incorrect regular expression, which allows remote attackers to cause a denial of service (infinite loop) via a crafted Content-Disposion header.",
  "id": "BREW-mailcatcher-CVE-2012-6109",
  "modified": "2026-09-04T09:28:51Z",
  "published": "2026-08-13T17:11:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2012-6109"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rack/rack/commit/c9f65df37a151821eb88ddd1dc404b83e52c52d5"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/errata/RHSA-2013:0544"
    },
    {
      "type": "WEB",
      "url": "https://access.redhat.com/security/cve/CVE-2012-6109"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=895277"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rack/rack"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rack/rack/blob/master/README.rdoc"
    },
    {
      "type": "WEB",
      "url": "https://github.com/rubysec/ruby-advisory-db/blob/master/gems/rack/CVE-2012-6109.yml"
    },
    {
      "type": "WEB",
      "url": "https://groups.google.com/forum/#!msg/rack-devel/1w4_fWEgTdI/XAkSNHjtdTsJ"
    },
    {
      "type": "WEB",
      "url": "https://rhn.redhat.com/errata/RHSA-2013-0544.html"
    }
  ],
  "schema_version": "1.7.3",
  "summary": "Rack vulnerable to REDoS",
  "upstream": [
    "GHSA-h77x-m5q8-c29h",
    "CVE-2012-6109"
  ]
}



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