Vulnerability-Lookup

CVE-2011-2686 (GCVE-0-2011-2686)

Vulnerability from cvelistv5 – Published: 2011-08-05 21:00 – Updated: 2024-08-06 23:08

Summary

Ruby before 1.8.7-p352 does not reset the random seed upon forking, which makes it easier for context-dependent attackers to predict the values of random numbers by leveraging knowledge of the number sequence obtained in a different child process, a related issue to CVE-2003-0900. NOTE: this issue exists because of a regression during Ruby 1.8.6 development.

Severity

No CVSS data available.

CWE

Assigner

redhat redhat root

References

13 references

URL	Tags
http://www.openwall.com/lists/oss-security/2011/0…	mailing-listx_refsource_MLIST
http://www.ruby-lang.org/en/news/2011/07/02/ruby-…	x_refsource_CONFIRM
https://bugzilla.redhat.com/show_bug.cgi?id=722415	x_refsource_CONFIRM
http://www.openwall.com/lists/oss-security/2011/0…	mailing-listx_refsource_MLIST
http://redmine.ruby-lang.org/issues/show/4338	x_refsource_CONFIRM
http://svn.ruby-lang.org/repos/ruby/tags/v1_8_7_3…	x_refsource_CONFIRM
http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=…	x_refsource_CONFIRM
http://lists.fedoraproject.org/pipermail/package-…	vendor-advisoryx_refsource_FEDORA
https://exchange.xforce.ibmcloud.com/vulnerabilit…	vdb-entryx_refsource_XF
http://www.openwall.com/lists/oss-security/2011/07/20/1	mailing-listx_refsource_MLIST
http://www.openwall.com/lists/oss-security/2011/07/11/1	mailing-listx_refsource_MLIST
http://www.securityfocus.com/bid/49015	vdb-entryx_refsource_BID
http://lists.fedoraproject.org/pipermail/package-…	vendor-advisoryx_refsource_FEDORA

Date Public

2011-07-11 00:00

Show details on NVD website

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    "redhat_vex": {
      "aggregate_severity": "Low",
      "current_release_date": "2026-05-08T15:05:27+00:00",
      "cve": "CVE-2011-2686",
      "id": "CVE-2011-2686",
      "initial_release_date": "2011-07-02T00:00:00+00:00",
      "product_status:fixed": "12",
      "product_status:known_affected": "12",
      "source": "Red Hat CSAF VEX",
      "status": "final",
      "title": "ruby: Properly initialize the random number generator when forking new process",
      "url": "https://security.access.redhat.com/data/csaf/v2/vex/2011/cve-2011-2686.json",
      "version": "3"
    },
    "suse_vex": {
      "aggregate_severity": "low",
      "current_release_date": "2026-04-19T00:17:05Z",
      "cve": "CVE-2011-2686",
      "id": "CVE-2011-2686",
      "initial_release_date": "2023-02-15T05:52:10Z",
      "product_status:recommended": "35",
      "source": "SUSE CSAF VEX",
      "status": "interim",
      "title": "SUSE CVE CVE-2011-2686",
      "url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2011-2686.json",
      "version": "8"
    }
  }
}

FKIE_CVE-2011-2686

Vulnerability from fkie_nvd - Published: 2011-08-05 21:55 - Updated: 2026-06-16 23:31

Severity

Summary

References

URL	Tags
secalert@redhat.com	http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063062.html	Patch
secalert@redhat.com	http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063071.html	Patch
secalert@redhat.com	http://redmine.ruby-lang.org/issues/show/4338
secalert@redhat.com	http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=31713	Patch
secalert@redhat.com	http://svn.ruby-lang.org/repos/ruby/tags/v1_8_7_352/ChangeLog
secalert@redhat.com	http://www.openwall.com/lists/oss-security/2011/07/11/1	Patch
secalert@redhat.com	http://www.openwall.com/lists/oss-security/2011/07/12/14	Patch
secalert@redhat.com	http://www.openwall.com/lists/oss-security/2011/07/20/1	Patch
secalert@redhat.com	http://www.openwall.com/lists/oss-security/2011/07/20/16	Patch
secalert@redhat.com	http://www.ruby-lang.org/en/news/2011/07/02/ruby-1-8-7-p352-released/	Patch
secalert@redhat.com	http://www.securityfocus.com/bid/49015
secalert@redhat.com	https://bugzilla.redhat.com/show_bug.cgi?id=722415	Patch
secalert@redhat.com	https://exchange.xforce.ibmcloud.com/vulnerabilities/69032
af854a3a-2127-422b-91ae-364da2661108	http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063062.html	Patch
af854a3a-2127-422b-91ae-364da2661108	http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063071.html	Patch
af854a3a-2127-422b-91ae-364da2661108	http://redmine.ruby-lang.org/issues/show/4338
af854a3a-2127-422b-91ae-364da2661108	http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=31713	Patch
af854a3a-2127-422b-91ae-364da2661108	http://svn.ruby-lang.org/repos/ruby/tags/v1_8_7_352/ChangeLog
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2011/07/11/1	Patch
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2011/07/12/14	Patch
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2011/07/20/1	Patch
af854a3a-2127-422b-91ae-364da2661108	http://www.openwall.com/lists/oss-security/2011/07/20/16	Patch
af854a3a-2127-422b-91ae-364da2661108	http://www.ruby-lang.org/en/news/2011/07/02/ruby-1-8-7-p352-released/	Patch
af854a3a-2127-422b-91ae-364da2661108	http://www.securityfocus.com/bid/49015
af854a3a-2127-422b-91ae-364da2661108	https://bugzilla.redhat.com/show_bug.cgi?id=722415	Patch
af854a3a-2127-422b-91ae-364da2661108	https://exchange.xforce.ibmcloud.com/vulnerabilities/69032

Impacted products

Vendor	Product	Version
ruby-lang	ruby	*
ruby-lang	ruby	1.8.7
ruby-lang	ruby	1.8.7
ruby-lang	ruby	1.8.7
ruby-lang	ruby	1.8.7-160
ruby-lang	ruby	1.8.7-173
ruby-lang	ruby	1.8.7-248
ruby-lang	ruby	1.8.7-249
ruby-lang	ruby	1.8.7-299
ruby-lang	ruby	1.8.7-302
ruby-lang	ruby	1.8.7-330
ruby-lang	ruby	1.8.7-p21

JSON

To clipboard

{
  "affected": [
    {
      "affectedData": [
        {
          "product": "n/a",
          "vendor": "n/a",
          "versions": [
            {
              "status": "affected",
              "version": "n/a"
            }
          ]
        }
      ],
      "source": "secalert@redhat.com"
    }
  ],
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              "vulnerable": true
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          ],
          "negate": false,
          "operator": "OR"
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      ]
    }
  ],
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Ruby before 1.8.7-p352 does not reset the random seed upon forking, which makes it easier for context-dependent attackers to predict the values of random numbers by leveraging knowledge of the number sequence obtained in a different child process, a related issue to CVE-2003-0900.  NOTE: this issue exists because of a regression during Ruby 1.8.6 development."
    },
    {
      "lang": "es",
      "value": "Ruby en versiones anteriores a la 1.8.7-p352 no resetea la semilla aleatoria despu\u00e9s de la creacci\u00f3n de procesos (\"forking\"), lo que facilita a atacantes dependientes del contexto predecir los valores de n\u00fameros aleatorios bas\u00e1ndose en el conocimiento de n\u00fameros de secuencia obtenidos de procesos hijo diferentes. Vulnerabilidad relacionada con la CVE-2003-0900.  NOTA: este problema existe debido a una regresi\u00f3n durante el desarrollo de Ruby 1.8.6."
    }
  ],
  "id": "CVE-2011-2686",
  "lastModified": "2026-06-16T23:31:47.733",
  "metrics": {
    "cvssMetricV2": [
      {
        "acInsufInfo": false,
        "baseSeverity": "MEDIUM",
        "cvssData": {
          "accessComplexity": "LOW",
          "accessVector": "NETWORK",
          "authentication": "NONE",
          "availabilityImpact": "NONE",
          "baseScore": 5.0,
          "confidentialityImpact": "PARTIAL",
          "integrityImpact": "NONE",
          "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
          "version": "2.0"
        },
        "exploitabilityScore": 10.0,
        "impactScore": 2.9,
        "obtainAllPrivilege": false,
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        "obtainUserPrivilege": false,
        "source": "nvd@nist.gov",
        "type": "Primary",
        "userInteractionRequired": false
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  "published": "2011-08-05T21:55:04.467",
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      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "http://www.openwall.com/lists/oss-security/2011/07/20/16"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
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      "url": "http://www.ruby-lang.org/en/news/2011/07/02/ruby-1-8-7-p352-released/"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "http://www.securityfocus.com/bid/49015"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "tags": [
        "Patch"
      ],
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=722415"
    },
    {
      "source": "af854a3a-2127-422b-91ae-364da2661108",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/69032"
    }
  ],
  "sourceIdentifier": "secalert@redhat.com",
  "vulnStatus": "Modified",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-310"
        }
      ],
      "source": "nvd@nist.gov",
      "type": "Primary"
    }
  ]
}

GHSA-G8G6-3P4H-6388

Vulnerability from github – Published: 2022-05-17 01:54 – Updated: 2025-04-11 03:49

Details

Show details on source website

JSON

To clipboard

{
  "affected": [],
  "aliases": [
    "CVE-2011-2686"
  ],
  "database_specific": {
    "cwe_ids": [],
    "github_reviewed": false,
    "github_reviewed_at": null,
    "nvd_published_at": "2011-08-05T21:55:00Z",
    "severity": "MODERATE"
  },
  "details": "Ruby before 1.8.7-p352 does not reset the random seed upon forking, which makes it easier for context-dependent attackers to predict the values of random numbers by leveraging knowledge of the number sequence obtained in a different child process, a related issue to CVE-2003-0900.  NOTE: this issue exists because of a regression during Ruby 1.8.6 development.",
  "id": "GHSA-g8g6-3p4h-6388",
  "modified": "2025-04-11T03:49:13Z",
  "published": "2022-05-17T01:54:30Z",
  "references": [
    {
      "type": "ADVISORY",
      "url": "https://nvd.nist.gov/vuln/detail/CVE-2011-2686"
    },
    {
      "type": "WEB",
      "url": "https://bugzilla.redhat.com/show_bug.cgi?id=722415"
    },
    {
      "type": "WEB",
      "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/69032"
    },
    {
      "type": "WEB",
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063062.html"
    },
    {
      "type": "WEB",
      "url": "http://lists.fedoraproject.org/pipermail/package-announce/2011-July/063071.html"
    },
    {
      "type": "WEB",
      "url": "http://redmine.ruby-lang.org/issues/show/4338"
    },
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      "url": "http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision\u0026revision=31713"
    },
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      "url": "http://svn.ruby-lang.org/repos/ruby/tags/v1_8_7_352/ChangeLog"
    },
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      "type": "WEB",
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    },
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    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2011/07/20/1"
    },
    {
      "type": "WEB",
      "url": "http://www.openwall.com/lists/oss-security/2011/07/20/16"
    },
    {
      "type": "WEB",
      "url": "http://www.ruby-lang.org/en/news/2011/07/02/ruby-1-8-7-p352-released"
    },
    {
      "type": "WEB",
      "url": "http://www.securityfocus.com/bid/49015"
    }
  ],
  "schema_version": "1.4.0",
  "severity": []
}

GSD-2011-2686

Vulnerability from gsd - Updated: 2023-12-13 01:19

Details

Aliases

CVE-2011-2686

Aliases

CVE-2011-2686

JSON

To clipboard

{
  "GSD": {
    "alias": "CVE-2011-2686",
    "description": "Ruby before 1.8.7-p352 does not reset the random seed upon forking, which makes it easier for context-dependent attackers to predict the values of random numbers by leveraging knowledge of the number sequence obtained in a different child process, a related issue to CVE-2003-0900.  NOTE: this issue exists because of a regression during Ruby 1.8.6 development.",
    "id": "GSD-2011-2686",
    "references": [
      "https://www.suse.com/security/cve/CVE-2011-2686.html"
    ]
  },
  "gsd": {
    "metadata": {
      "exploitCode": "unknown",
      "remediation": "unknown",
      "reportConfidence": "confirmed",
      "type": "vulnerability"
    },
    "osvSchema": {
      "aliases": [
        "CVE-2011-2686"
      ],
      "details": "Ruby before 1.8.7-p352 does not reset the random seed upon forking, which makes it easier for context-dependent attackers to predict the values of random numbers by leveraging knowledge of the number sequence obtained in a different child process, a related issue to CVE-2003-0900. NOTE: this issue exists because of a regression during Ruby 1.8.6 development.",
      "id": "GSD-2011-2686",
      "modified": "2023-12-13T01:19:06.504979Z",
      "schema_version": "1.4.0"
    }
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            "baseScore": 5.0,
            "confidentialityImpact": "PARTIAL",
            "integrityImpact": "NONE",
            "vectorString": "AV:N/AC:L/Au:N/C:P/I:N/A:N",
            "version": "2.0"
          },
          "exploitabilityScore": 10.0,
          "impactScore": 2.9,
          "obtainAllPrivilege": false,
          "obtainOtherPrivilege": false,
          "obtainUserPrivilege": false,
          "severity": "MEDIUM",
          "userInteractionRequired": false
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      "lastModifiedDate": "2023-02-13T01:20Z",
      "publishedDate": "2011-08-05T21:55Z"
    }
  }
}

RHSA-2026:7305

Vulnerability from csaf_redhat - Published: 2026-04-09 12:35 - Updated: 2026-09-08 11:18

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Moderate

Scope

36 vulnerabilities in this advisory, including CVE-2011-2686.

CVE-2011-2686

2.1 ()


                
                  AV:L/AC:L/Au:N/C:P/I:N/A:N

Fixed: 4 products

https://access.redhat.com/errata/RHSA-2026:7305

Open the full advisory

RHSA-2026:7307

Vulnerability from csaf_redhat - Published: 2026-04-09 12:37 - Updated: 2026-09-07 23:07

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Moderate

Scope

36 vulnerabilities in this advisory, including CVE-2011-2686.

CVE-2011-2686

2.1 ()


                
                  AV:L/AC:L/Au:N/C:P/I:N/A:N

Fixed: 4 products

https://access.redhat.com/errata/RHSA-2026:7307

Open the full advisory

RHSA-2026:8838

Vulnerability from csaf_redhat - Published: 2026-04-17 23:15 - Updated: 2026-09-08 05:00

Summary

Red Hat Security Advisory: Red Hat Hardened Images RPMs bug fix and enhancement update

Severity

Moderate

Scope

36 vulnerabilities in this advisory, including CVE-2011-2686.

CVE-2011-2686

2.1 ()


                
                  AV:L/AC:L/Au:N/C:P/I:N/A:N

Fixed: 4 products

https://access.redhat.com/errata/RHSA-2026:8838

Open the full advisory

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.

Detection rules are retrieved from Rulezet.

The MITRE ATT&CK techniques below are AI-generated suggestions, inferred from the description of the vulnerability by the CIRCL/vulnerability-attack-technique-classification-roberta-base model, served locally by ML-Gateway. They have not been verified by an analyst and are provided for guidance only.
The approach is described in our paper Mapping CVEs to MITRE ATT&CK Techniques: A Curated Gold-Set Classifier and the Limits of LLM-Assisted Label Expansion.
Browse all ATT&CK techniques and the vulnerabilities related to each.

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.

Action not permitted

CVE-2011-2686 (GCVE-0-2011-2686)

FKIE_CVE-2011-2686

GHSA-G8G6-3P4H-6388

GSD-2011-2686

RHSA-2026:7305

RHSA-2026:7307

RHSA-2026:8838

Tags

Sightings

Nomenclature

Related by attack behaviour