« Back to list

CVE-2012-5371

Status: ModifiedMedium (5)—

Ruby (aka CRuby) 1.9 before 1.9.3-p327 and 2.0 before r37575 computes hash values without properly restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table, as demonstrated by a universal multicollision attack against a variant of the MurmurHash2 algorithm, a different vulnerability than CVE-2011-4815.

CVSS

Exploitation probability (EPSS)

EPSS (Exploit Prediction Scoring System, FIRST) estimates how likely a vulnerability is to be exploited in the wild within 30 days. It complements CVSS (impact) and CISA KEV (confirmed exploitation).

Affected technologies (1)

Ruby-lang — Ruby

CWEs

References

Raw JSON (NVD)

Show
{
  "id": "CVE-2012-5371",
  "cveTags": [],
  "metrics": {
    "cvssMetricV2": [
      {
        "type": "Primary",
        "source": "nvd@nist.gov",
        "cvssData": {
          "version": "2.0",
          "baseScore": 5,
          "accessVector": "NETWORK",
          "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
          "authentication": "NONE",
          "integrityImpact": "NONE",
          "accessComplexity": "LOW",
          "availabilityImpact": "PARTIAL",
          "confidentialityImpact": "NONE"
        },
        "acInsufInfo": false,
        "impactScore": 2.9,
        "baseSeverity": "MEDIUM",
        "obtainAllPrivilege": false,
        "exploitabilityScore": 10,
        "obtainUserPrivilege": false,
        "obtainOtherPrivilege": false,
        "userInteractionRequired": false
      }
    ]
  },
  "affected": [
    {
      "source": "cve@mitre.org",
      "affectedData": [
        {
          "vendor": "n/a",
          "product": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ]
    }
  ],
  "published": "2012-11-28T13:03:10.153",
  "references": [
    {
      "url": "http://2012.appsec-forum.ch/conferences/#c17",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://asfws12.files.wordpress.com/2012/11/asfws2012-jean_philippe_aumasson-martin_bosslet-hash_flooding_dos_reloaded.pdf",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://secunia.com/advisories/51253",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://securitytracker.com/id?1027747",
      "tags": [
        "Patch"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.ocert.org/advisories/ocert-2012-001.html",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.osvdb.org/87280",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.ruby-lang.org/en/news/2012/11/09/ruby19-hashdos-cve-2012-5371/",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.securityfocus.com/bid/56484",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://www.ubuntu.com/usn/USN-1733-1",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=875236",
      "tags": [
        "Patch"
      ],
      "source": "cve@mitre.org"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/79993",
      "source": "cve@mitre.org"
    },
    {
      "url": "https://www.131002.net/data/talks/appsec12_slides.pdf",
      "source": "cve@mitre.org"
    },
    {
      "url": "http://2012.appsec-forum.ch/conferences/#c17",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://asfws12.files.wordpress.com/2012/11/asfws2012-jean_philippe_aumasson-martin_bosslet-hash_flooding_dos_reloaded.pdf",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://secunia.com/advisories/51253",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://securitytracker.com/id?1027747",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.ocert.org/advisories/ocert-2012-001.html",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.osvdb.org/87280",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.ruby-lang.org/en/news/2012/11/09/ruby19-hashdos-cve-2012-5371/",
      "tags": [
        "Patch",
        "Vendor Advisory"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.securityfocus.com/bid/56484",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "http://www.ubuntu.com/usn/USN-1733-1",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=875236",
      "tags": [
        "Patch"
      ],
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/79993",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    },
    {
      "url": "https://www.131002.net/data/talks/appsec12_slides.pdf",
      "source": "af854a3a-2127-422b-91ae-364da2661108"
    }
  ],
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "type": "Primary",
      "source": "nvd@nist.gov",
      "description": [
        {
          "lang": "en",
          "value": "CWE-310"
        }
      ]
    }
  ],
  "descriptions": [
    {
      "lang": "en",
      "value": "Ruby (aka CRuby) 1.9 before 1.9.3-p327 and 2.0 before r37575 computes hash values without properly restricting the ability to trigger hash collisions predictably, which allows context-dependent attackers to cause a denial of service (CPU consumption) via crafted input to an application that maintains a hash table, as demonstrated by a universal multicollision attack against a variant of the MurmurHash2 algorithm, a different vulnerability than CVE-2011-4815."
    },
    {
      "lang": "es",
      "value": "Ruby (también conocido como CRuby) v1.9 anteriores a v1.9.3-p327 y v2.0 anteriores a r37575 calcula los valores de hash sin restringir la posibilidad de provocar colisiones hash previsibles, lo que permite a atacantes dependientes de contexto provocar una denegación de servicio (consumo de CPU) a través de la manipulación de una entrada para la aplicación que mantiene la tabla de valores hash, como lo demuestra un ataque universal  multicolision contra una variante del algoritmo MurmurHash2, una vulnerabilidad diferente a CVE-2011-4815."
    }
  ],
  "lastModified": "2026-06-16T23:46:44.907",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
            {
              "criteria": "cpe:2.3:a:ruby-lang:ruby:*:p286:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "A45A2FA0-5451-4A6D-8301-B60645354AA5",
              "versionEndIncluding": "1.9.3"
            },
            {
              "criteria": "cpe:2.3:a:ruby-lang:ruby:1.9:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D9237145-35F8-4E05-B730-77C0F386E5B2"
            },
            {
              "criteria": "cpe:2.3:a:ruby-lang:ruby:1.9.1:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "C78BB1D8-0505-484D-B824-1AA219F8B247"
            },
            {
              "criteria": "cpe:2.3:a:ruby-lang:ruby:1.9.2:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "5178D04D-1C29-4353-8987-559AA07443EC"
            },
            {
              "criteria": "cpe:2.3:a:ruby-lang:ruby:1.9.3:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "D0535DC9-EB0E-4745-80AC-4A020DF26E38"
            },
            {
              "criteria": "cpe:2.3:a:ruby-lang:ruby:1.9.3:p0:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "94F5AA37-B466-4E2E-B217-5119BADDD87B"
            },
            {
              "criteria": "cpe:2.3:a:ruby-lang:ruby:1.9.3:p125:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "6DF0F0F5-4022-4837-9B40-4B1127732CC9"
            },
            {
              "criteria": "cpe:2.3:a:ruby-lang:ruby:1.9.3:p194:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "B3848B08-85C2-4AAD-AA33-CCEB80EF5B32"
            },
            {
              "criteria": "cpe:2.3:a:ruby-lang:ruby:2.0:*:*:*:*:*:*:*",
              "vulnerable": true,
              "matchCriteriaId": "90E0471D-1323-4E67-B66C-DEBF3BBAEEAA"
            }
          ],
          "operator": "OR"
        }
      ]
    }
  ],
  "sourceIdentifier": "cve@mitre.org"
}