FKIE_CVE-2011-4838
Vulnerability from fkie_nvd - Published: 2011-12-30 01:55 - Updated: 2026-06-16 23:35
Severity
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.
References
{
"affected": [
{
"affectedData": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"source": "cve@mitre.org"
}
],
"configurations": [
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"nodes": [
{
"cpeMatch": [
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"criteria": "cpe:2.3:a:jruby:jruby:*:*:*:*:*:*:*:*",
"matchCriteriaId": "F3DE8162-6FF2-4CDC-B66A-3D06AE5D7CB5",
"versionEndExcluding": "1.6.5.1",
"vulnerable": true
}
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"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": "2026-06-16T23:35:29.917",
"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": [
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],
"url": "http://archives.neohapsis.com/archives/bugtraq/2011-12/0181.html"
},
{
"source": "cve@mitre.org",
"tags": [
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"url": "http://jruby.org/2011/12/27/jruby-1-6-5-1.html"
},
{
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"tags": [
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"url": "http://rhn.redhat.com/errata/RHSA-2012-1232.html"
},
{
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"tags": [
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"url": "http://secunia.com/advisories/47407"
},
{
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"url": "http://secunia.com/advisories/50084"
},
{
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"tags": [
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"url": "http://security.gentoo.org/glsa/glsa-201207-06.xml"
},
{
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"url": "http://www.kb.cert.org/vuls/id/903934"
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{
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{
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},
{
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"tags": [
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],
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/72019"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
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{
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"url": "http://jruby.org/2011/12/27/jruby-1-6-5-1.html"
},
{
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"url": "http://rhn.redhat.com/errata/RHSA-2012-1232.html"
},
{
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{
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},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"url": "http://security.gentoo.org/glsa/glsa-201207-06.xml"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"url": "http://www.kb.cert.org/vuls/id/903934"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"url": "http://www.nruns.com/_downloads/advisory28122011.pdf"
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{
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"url": "http://www.ocert.org/advisories/ocert-2011-003.html"
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{
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"tags": [
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],
"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"
}
]
}
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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.
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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.
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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.
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