CVE-2008-3656 (GCVE-0-2008-3656)
Vulnerability from cvelistv5 – Published: 2008-08-13 01:00 – Updated: 2024-08-07 09:45
VLAI
EPSS
VEX
Summary
Algorithmic complexity vulnerability in the WEBrick::HTTPUtils.split_header_value function in WEBrick::HTTP::DefaultFileHandler in WEBrick in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted HTTP request that is processed by a backtracking regular expression.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
30 references
Date Public
2008-08-08 00:00
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"value": "Algorithmic complexity vulnerability in the WEBrick::HTTPUtils.split_header_value function in WEBrick::HTTP::DefaultFileHandler in WEBrick in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted HTTP request that is processed by a backtracking regular expression."
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"value": "Una vulnerabilidad de complejidad algor\u00edtmica en la funci\u00f3n WEBrick::HTTPUtils.split_header_value en WEBrick::HTTP::DefaultFileHandler en WEBrick en Ruby versiones 1.8.5 y anteriores, versiones 1.8.6 hasta 1.8.6-p286, versiones 1.8.7 hasta 1.8.7-p71, y versiones 1.9 hasta r18423, permite a los atacantes dependiendo del contexto causar una denegaci\u00f3n de servicio (consumo de CPU) por medio de una petici\u00f3n HTTP dise\u00f1ada que se procesa mediante una expresi\u00f3n regular backtracking."
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Algorithmic complexity vulnerability in the WEBrick::HTTPUtils.split_header_value function in WEBrick::HTTP::DefaultFileHandler in WEBrick in Ruby 1.8.5 and earlier, 1.8.6 through 1.8.6-p286, 1.8.7 through 1.8.7-p71, and 1.9 through r18423 allows context-dependent attackers to cause a denial of service (CPU consumption) via a crafted HTTP request that is processed by a backtracking regular expression."
},
{
"lang": "es",
"value": "Una vulnerabilidad de complejidad algor\u00edtmica en la funci\u00f3n WEBrick::HTTPUtils.split_header_value en WEBrick::HTTP::DefaultFileHandler en WEBrick en Ruby versiones 1.8.5 y anteriores, versiones 1.8.6 hasta 1.8.6-p286, versiones 1.8.7 hasta 1.8.7-p71, y versiones 1.9 hasta r18423, permite a los atacantes dependiendo del contexto causar una denegaci\u00f3n de servicio (consumo de CPU) por medio de una petici\u00f3n HTTP dise\u00f1ada que se procesa mediante una expresi\u00f3n regular backtracking."
}
],
"id": "CVE-2008-3656",
"lastModified": "2026-04-23T00:35:47.467",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": true,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 7.8,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:L/Au:N/C:N/I:N/A:C",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 6.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
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},
"published": "2008-08-13T01:41:00.000",
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},
"redhat_vex": {
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"cve": "CVE-2008-3656",
"id": "CVE-2008-3656",
"initial_release_date": "2008-08-08T00:00:00+00:00",
"product_status:fixed": "387",
"source": "Red Hat CSAF VEX",
"status": "final",
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"version": "3"
},
"suse_vex": {
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"current_release_date": "2026-04-25T01:54:48Z",
"cve": "CVE-2008-3656",
"id": "CVE-2008-3656",
"initial_release_date": "2023-02-15T06:07:24Z",
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"source": "SUSE CSAF VEX",
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"title": "SUSE CVE CVE-2008-3656",
"url": "https://ftp.suse.com/pub/projects/security/csaf-vex/cve-2008-3656.json",
"version": "8"
}
}
}
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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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