CVE-2011-4838 (GCVE-0-2011-4838)
Vulnerability from cvelistv5 – Published: 2011-12-30 01:00 – Updated: 2024-08-07 00:16
VLAI
EPSS
VEX
Summary
JRuby before 1.6.5.1 computes hash values without 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.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
10 references
| URL | Tags |
|---|---|
| http://www.nruns.com/_downloads/advisory28122011.pdf | x_refsource_MISC |
| https://exchange.xforce.ibmcloud.com/vulnerabilit… | vdb-entryx_refsource_XF |
| http://jruby.org/2011/12/27/jruby-1-6-5-1.html | x_refsource_CONFIRM |
| http://secunia.com/advisories/50084 | third-party-advisoryx_refsource_SECUNIA |
| http://secunia.com/advisories/47407 | third-party-advisoryx_refsource_SECUNIA |
| http://www.kb.cert.org/vuls/id/903934 | third-party-advisoryx_refsource_CERT-VN |
| http://rhn.redhat.com/errata/RHSA-2012-1232.html | vendor-advisoryx_refsource_REDHAT |
| http://archives.neohapsis.com/archives/bugtraq/20… | mailing-listx_refsource_BUGTRAQ |
| http://security.gentoo.org/glsa/glsa-201207-06.xml | vendor-advisoryx_refsource_GENTOO |
| http://www.ocert.org/advisories/ocert-2011-003.html | x_refsource_MISC |
Date Public
2011-12-28 00:00
{
"containers": {
"adp": [
{
"providerMetadata": {
"dateUpdated": "2024-08-07T00:16:34.943Z",
"orgId": "af854a3a-2127-422b-91ae-364da2661108",
"shortName": "CVE"
},
"references": [
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "http://www.nruns.com/_downloads/advisory28122011.pdf"
},
{
"name": "jruby-hash-dos(72019)",
"tags": [
"vdb-entry",
"x_refsource_XF",
"x_transferred"
],
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/72019"
},
{
"tags": [
"x_refsource_CONFIRM",
"x_transferred"
],
"url": "http://jruby.org/2011/12/27/jruby-1-6-5-1.html"
},
{
"name": "50084",
"tags": [
"third-party-advisory",
"x_refsource_SECUNIA",
"x_transferred"
],
"url": "http://secunia.com/advisories/50084"
},
{
"name": "47407",
"tags": [
"third-party-advisory",
"x_refsource_SECUNIA",
"x_transferred"
],
"url": "http://secunia.com/advisories/47407"
},
{
"name": "VU#903934",
"tags": [
"third-party-advisory",
"x_refsource_CERT-VN",
"x_transferred"
],
"url": "http://www.kb.cert.org/vuls/id/903934"
},
{
"name": "RHSA-2012:1232",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT",
"x_transferred"
],
"url": "http://rhn.redhat.com/errata/RHSA-2012-1232.html"
},
{
"name": "20111228 n.runs-SA-2011.004 - web programming languages and platforms - DoS through hash table",
"tags": [
"mailing-list",
"x_refsource_BUGTRAQ",
"x_transferred"
],
"url": "http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html"
},
{
"name": "GLSA-201207-06",
"tags": [
"vendor-advisory",
"x_refsource_GENTOO",
"x_transferred"
],
"url": "http://security.gentoo.org/glsa/glsa-201207-06.xml"
},
{
"tags": [
"x_refsource_MISC",
"x_transferred"
],
"url": "http://www.ocert.org/advisories/ocert-2011-003.html"
}
],
"title": "CVE Program Container"
}
],
"cna": {
"affected": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"datePublic": "2011-12-28T00:00:00.000Z",
"descriptions": [
{
"lang": "en",
"value": "JRuby before 1.6.5.1 computes hash values without 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."
}
],
"problemTypes": [
{
"descriptions": [
{
"description": "n/a",
"lang": "en",
"type": "text"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2017-08-28T12:57:01.000Z",
"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"shortName": "mitre"
},
"references": [
{
"tags": [
"x_refsource_MISC"
],
"url": "http://www.nruns.com/_downloads/advisory28122011.pdf"
},
{
"name": "jruby-hash-dos(72019)",
"tags": [
"vdb-entry",
"x_refsource_XF"
],
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/72019"
},
{
"tags": [
"x_refsource_CONFIRM"
],
"url": "http://jruby.org/2011/12/27/jruby-1-6-5-1.html"
},
{
"name": "50084",
"tags": [
"third-party-advisory",
"x_refsource_SECUNIA"
],
"url": "http://secunia.com/advisories/50084"
},
{
"name": "47407",
"tags": [
"third-party-advisory",
"x_refsource_SECUNIA"
],
"url": "http://secunia.com/advisories/47407"
},
{
"name": "VU#903934",
"tags": [
"third-party-advisory",
"x_refsource_CERT-VN"
],
"url": "http://www.kb.cert.org/vuls/id/903934"
},
{
"name": "RHSA-2012:1232",
"tags": [
"vendor-advisory",
"x_refsource_REDHAT"
],
"url": "http://rhn.redhat.com/errata/RHSA-2012-1232.html"
},
{
"name": "20111228 n.runs-SA-2011.004 - web programming languages and platforms - DoS through hash table",
"tags": [
"mailing-list",
"x_refsource_BUGTRAQ"
],
"url": "http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html"
},
{
"name": "GLSA-201207-06",
"tags": [
"vendor-advisory",
"x_refsource_GENTOO"
],
"url": "http://security.gentoo.org/glsa/glsa-201207-06.xml"
},
{
"tags": [
"x_refsource_MISC"
],
"url": "http://www.ocert.org/advisories/ocert-2011-003.html"
}
],
"x_legacyV4Record": {
"CVE_data_meta": {
"ASSIGNER": "cve@mitre.org",
"ID": "CVE-2011-4838",
"STATE": "PUBLIC"
},
"affects": {
"vendor": {
"vendor_data": [
{
"product": {
"product_data": [
{
"product_name": "n/a",
"version": {
"version_data": [
{
"version_value": "n/a"
}
]
}
}
]
},
"vendor_name": "n/a"
}
]
}
},
"data_format": "MITRE",
"data_type": "CVE",
"data_version": "4.0",
"description": {
"description_data": [
{
"lang": "eng",
"value": "JRuby before 1.6.5.1 computes hash values without 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."
}
]
},
"problemtype": {
"problemtype_data": [
{
"description": [
{
"lang": "eng",
"value": "n/a"
}
]
}
]
},
"references": {
"reference_data": [
{
"name": "http://www.nruns.com/_downloads/advisory28122011.pdf",
"refsource": "MISC",
"url": "http://www.nruns.com/_downloads/advisory28122011.pdf"
},
{
"name": "jruby-hash-dos(72019)",
"refsource": "XF",
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/72019"
},
{
"name": "http://jruby.org/2011/12/27/jruby-1-6-5-1.html",
"refsource": "CONFIRM",
"url": "http://jruby.org/2011/12/27/jruby-1-6-5-1.html"
},
{
"name": "50084",
"refsource": "SECUNIA",
"url": "http://secunia.com/advisories/50084"
},
{
"name": "47407",
"refsource": "SECUNIA",
"url": "http://secunia.com/advisories/47407"
},
{
"name": "VU#903934",
"refsource": "CERT-VN",
"url": "http://www.kb.cert.org/vuls/id/903934"
},
{
"name": "RHSA-2012:1232",
"refsource": "REDHAT",
"url": "http://rhn.redhat.com/errata/RHSA-2012-1232.html"
},
{
"name": "20111228 n.runs-SA-2011.004 - web programming languages and platforms - DoS through hash table",
"refsource": "BUGTRAQ",
"url": "http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html"
},
{
"name": "GLSA-201207-06",
"refsource": "GENTOO",
"url": "http://security.gentoo.org/glsa/glsa-201207-06.xml"
},
{
"name": "http://www.ocert.org/advisories/ocert-2011-003.html",
"refsource": "MISC",
"url": "http://www.ocert.org/advisories/ocert-2011-003.html"
}
]
}
}
}
},
"cveMetadata": {
"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca",
"assignerShortName": "mitre",
"cveId": "CVE-2011-4838",
"datePublished": "2011-12-30T01:00:00.000Z",
"dateReserved": "2011-12-15T00:00:00.000Z",
"dateUpdated": "2024-08-07T00:16:34.943Z",
"state": "PUBLISHED"
},
"dataType": "CVE_RECORD",
"dataVersion": "5.1",
"vulnerability-lookup:meta": {
"epss": {
"cve": "CVE-2011-4838",
"date": "2026-09-27",
"epss": "0.04203",
"percentile": "0.90613"
},
"fkie_nvd": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:jruby:jruby:*:*:*:*:*:*:*:*",
"matchCriteriaId": "F3DE8162-6FF2-4CDC-B66A-3D06AE5D7CB5",
"versionEndExcluding": "1.6.5.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"descriptions": [
{
"lang": "en",
"value": "JRuby before 1.6.5.1 computes hash values without 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."
},
{
"lang": "es",
"value": "JRuby anterior a v1.6.5.1 calcula los valores de hash sin restringir la capacidad de desencadenar colisiones hash predecible, que permite a atacantes dependientes de contexto causar una denegaci\u00f3n de servicio (consumo de CPU) a trav\u00e9s de entrada dise\u00f1ado para una aplicaci\u00f3n que mantiene una tabla hash."
}
],
"id": "CVE-2011-4838",
"lastModified": "2024-11-21T01:33:06.217",
"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": "2011-12-30T01:55:01.500",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Broken Link"
],
"url": "http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Vendor Advisory"
],
"url": "http://jruby.org/2011/12/27/jruby-1-6-5-1.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Broken Link"
],
"url": "http://rhn.redhat.com/errata/RHSA-2012-1232.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "http://secunia.com/advisories/47407"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "http://secunia.com/advisories/50084"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "http://security.gentoo.org/glsa/glsa-201207-06.xml"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory",
"US Government Resource"
],
"url": "http://www.kb.cert.org/vuls/id/903934"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "http://www.nruns.com/_downloads/advisory28122011.pdf"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "http://www.ocert.org/advisories/ocert-2011-003.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/72019"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Broken Link"
],
"url": "http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "http://jruby.org/2011/12/27/jruby-1-6-5-1.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Broken Link"
],
"url": "http://rhn.redhat.com/errata/RHSA-2012-1232.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://secunia.com/advisories/47407"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://secunia.com/advisories/50084"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://security.gentoo.org/glsa/glsa-201207-06.xml"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"US Government Resource"
],
"url": "http://www.kb.cert.org/vuls/id/903934"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://www.nruns.com/_downloads/advisory28122011.pdf"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://www.ocert.org/advisories/ocert-2011-003.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/72019"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-400"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"nvd": {
"cve": {
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:a:jruby:jruby:*:*:*:*:*:*:*:*",
"matchCriteriaId": "F3DE8162-6FF2-4CDC-B66A-3D06AE5D7CB5",
"versionEndExcluding": "1.6.5.1",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "JRuby before 1.6.5.1 computes hash values without 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."
},
{
"lang": "es",
"value": "JRuby anterior a v1.6.5.1 calcula los valores de hash sin restringir la capacidad de desencadenar colisiones hash predecible, que permite a atacantes dependientes de contexto causar una denegaci\u00f3n de servicio (consumo de CPU) a trav\u00e9s de entrada dise\u00f1ado para una aplicaci\u00f3n que mantiene una tabla hash."
}
],
"id": "CVE-2011-4838",
"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": "2011-12-30T01:55:01.500",
"references": [
{
"source": "cve@mitre.org",
"tags": [
"Broken Link"
],
"url": "http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Vendor Advisory"
],
"url": "http://jruby.org/2011/12/27/jruby-1-6-5-1.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Broken Link"
],
"url": "http://rhn.redhat.com/errata/RHSA-2012-1232.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "http://secunia.com/advisories/47407"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "http://secunia.com/advisories/50084"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "http://security.gentoo.org/glsa/glsa-201207-06.xml"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory",
"US Government Resource"
],
"url": "http://www.kb.cert.org/vuls/id/903934"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "http://www.nruns.com/_downloads/advisory28122011.pdf"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory"
],
"url": "http://www.ocert.org/advisories/ocert-2011-003.html"
},
{
"source": "cve@mitre.org",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/72019"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Broken Link"
],
"url": "http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Vendor Advisory"
],
"url": "http://jruby.org/2011/12/27/jruby-1-6-5-1.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Broken Link"
],
"url": "http://rhn.redhat.com/errata/RHSA-2012-1232.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://secunia.com/advisories/47407"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://secunia.com/advisories/50084"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://security.gentoo.org/glsa/glsa-201207-06.xml"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"US Government Resource"
],
"url": "http://www.kb.cert.org/vuls/id/903934"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://www.nruns.com/_downloads/advisory28122011.pdf"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory"
],
"url": "http://www.ocert.org/advisories/ocert-2011-003.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/72019"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-400"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Moderate",
"current_release_date": "2025-11-21T12:54:47+00:00",
"cve": "CVE-2011-4838",
"id": "CVE-2011-4838",
"initial_release_date": "2011-12-28T00:00:00+00:00",
"product_status:fixed": "1",
"product_status:known_affected": "1",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "jruby: hash table collisions DoS (oCERT-2011-003)",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2011/cve-2011-4838.json",
"version": "3"
}
}
}
Loading…
Loading…
Experimental. This forecast is provided for visualization only and may change without notice. Do not use it for operational decisions.
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.
Loading…
Loading…
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.
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.
Loading…
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.
Loading…