CVE-2012-5371 (GCVE-0-2012-5371)

Vulnerability from cvelistv5 – Published: 2012-11-28 11:00 – Updated: 2024-08-06 21:05
VLAI
Summary
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.
Severity
No CVSS data available.
CWE
  • n/a
Assigner
mitre CNA under the mitre root
CNA scorecard E 28/100 over 2262 records in the last 180 days details
References
Date Public
2012-11-07 00:00
Show details on NVD website
To clipboard 

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                    "criteria": "cpe:2.3:a:ruby-lang:ruby:1.9.3:p125:*:*:*:*:*:*",
                    "matchCriteriaId": "6DF0F0F5-4022-4837-9B40-4B1127732CC9",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:ruby-lang:ruby:1.9.3:p194:*:*:*:*:*:*",
                    "matchCriteriaId": "B3848B08-85C2-4AAD-AA33-CCEB80EF5B32",
                    "vulnerable": true
                  },
                  {
                    "criteria": "cpe:2.3:a:ruby-lang:ruby:2.0:*:*:*:*:*:*:*",
                    "matchCriteriaId": "90E0471D-1323-4E67-B66C-DEBF3BBAEEAA",
                    "vulnerable": true
                  }
                ],
                "negate": false,
                "operator": "OR"
              }
            ]
          }
        ],
        "cveTags": [],
        "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 (tambi\u00e9n 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 denegaci\u00f3n de servicio (consumo de CPU) a trav\u00e9s de la manipulaci\u00f3n de una entrada para la aplicaci\u00f3n 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."
          }
        ],
        "id": "CVE-2012-5371",
        "lastModified": "2026-04-29T01:13:23.040",
        "metrics": {
          "cvssMetricV2": [
            {
              "acInsufInfo": false,
              "baseSeverity": "MEDIUM",
              "cvssData": {
                "accessComplexity": "LOW",
                "accessVector": "NETWORK",
                "authentication": "NONE",
                "availabilityImpact": "PARTIAL",
                "baseScore": 5.0,
                "confidentialityImpact": "NONE",
                "integrityImpact": "NONE",
                "vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:P",
                "version": "2.0"
              },
              "exploitabilityScore": 10.0,
              "impactScore": 2.9,
              "obtainAllPrivilege": false,
              "obtainOtherPrivilege": false,
              "obtainUserPrivilege": false,
              "source": "nvd@nist.gov",
              "type": "Primary",
              "userInteractionRequired": false
            }
          ]
        },
        "published": "2012-11-28T13:03:10.153",
        "references": [
          {
            "source": "cve@mitre.org",
            "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",
            "tags": [
              "Patch"
            ],
            "url": "http://securitytracker.com/id?1027747"
          },
          {
            "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",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "http://www.ruby-lang.org/en/news/2012/11/09/ruby19-hashdos-cve-2012-5371/"
          },
          {
            "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",
            "tags": [
              "Patch"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=875236"
          },
          {
            "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": "af854a3a-2127-422b-91ae-364da2661108",
            "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",
            "tags": [
              "Patch"
            ],
            "url": "http://securitytracker.com/id?1027747"
          },
          {
            "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",
            "tags": [
              "Patch",
              "Vendor Advisory"
            ],
            "url": "http://www.ruby-lang.org/en/news/2012/11/09/ruby19-hashdos-cve-2012-5371/"
          },
          {
            "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",
            "tags": [
              "Patch"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=875236"
          },
          {
            "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"
          }
        ],
        "sourceIdentifier": "cve@mitre.org",
        "vulnStatus": "Modified",
        "weaknesses": [
          {
            "description": [
              {
                "lang": "en",
                "value": "CWE-310"
              }
            ],
            "source": "nvd@nist.gov",
            "type": "Primary"
          }
        ]
      }
    },
    "redhat_vex": {
      "aggregate_severity": "Moderate",
      "current_release_date": "2026-04-20T21:34:35+00:00",
      "cve": "CVE-2012-5371",
      "id": "CVE-2012-5371",
      "initial_release_date": "2012-11-09T00:00:00+00:00",
      "product_status:fixed": "154",
      "product_status:known_affected": "1",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "ruby: Murmur hash-flooding DoS flaw in ruby 1.9 (oCERT-2012-001)",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2012/cve-2012-5371.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "moderate",
      "current_release_date": "2023-12-08T05:00:01Z",
      "cve": "CVE-2012-5371",
      "id": "CVE-2012-5371",
      "initial_release_date": "2023-02-15T05:43:49Z",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2012-5371",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2012-5371.json",
      "version": "3"
    }
  }
}



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Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • 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.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.
Vulnerability timeline

Sightings and recorded dates, grouped by day · UTC

JSON
How durations are calculated

Following the VTEM framework (Black Hat USA 2015), time to patch starts when the vendor or a coordinator was informed, total time to patch at discovery, and disclosure to patch at public disclosure; vendor response time runs from the report to its acknowledgement. Time to exploit and time unpatched start at the earliest discovery or report, falling back to public disclosure. Unpatched time ends at the first recorded patch, or the calculation time when no patch is recorded. Exploitation to patch shows the interval between those two events; a published proof of concept is a public exploit, not exploitation.

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    Related by attack behaviour

    Vulnerabilities whose description is nearest to this one in the vector space of the CIRCL/vulnerability-attack-technique-biencoder model. This is a similarity search over the bi-encoder space (plain cosine), not a classification, and it has no measured accuracy.