FKIE_CVE-2009-1891
Vulnerability from fkie_nvd - Published: 2009-07-10 15:30 - Updated: 2026-06-16 23:08
Severity
Summary
The mod_deflate module in Apache httpd 2.2.11 and earlier compresses large files until completion even after the associated network connection is closed, which allows remote attackers to cause a denial of service (CPU consumption).
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| apache | http_server | * | |
| apache | http_server | * | |
| debian | debian_linux | 4.0 | |
| debian | debian_linux | 5.0 | |
| debian | debian_linux | 6.0 | |
| fedoraproject | fedora | 11 | |
| canonical | ubuntu_linux | 6.06 | |
| canonical | ubuntu_linux | 8.04 | |
| canonical | ubuntu_linux | 8.10 | |
| canonical | ubuntu_linux | 9.04 | |
| redhat | enterprise_linux_desktop | 5.0 | |
| redhat | enterprise_linux_eus | 5.3 | |
| redhat | enterprise_linux_server | 5.0 | |
| redhat | enterprise_linux_server_aus | 5.3 | |
| redhat | enterprise_linux_workstation | 5.0 |
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"value": "The mod_deflate module in Apache httpd 2.2.11 and earlier compresses large files until completion even after the associated network connection is closed, which allows remote attackers to cause a denial of service (CPU consumption)."
},
{
"lang": "es",
"value": "El m\u00f3dulo mod_deflate en Apache httpd v2.2.11 y anteriores comprime archivos de gran tama\u00f1o hasta finalizar incluso despu\u00e9s de que la conexi\u00f3n de red asociada est\u00e1 cerrada, lo cual permite a atacantes remotos provocar una denegaci\u00f3n de servicio (consumo de CPU)."
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"id": "CVE-2009-1891",
"lastModified": "2026-06-16T23:08:17.760",
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"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "COMPLETE",
"baseScore": 7.1,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:C",
"version": "2.0"
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"exploitabilityScore": 8.6,
"impactScore": 6.9,
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"source": "nvd@nist.gov",
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"published": "2009-07-10T15:30:00.187",
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],
"sourceIdentifier": "secalert@redhat.com",
"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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