CVE-2011-4415 (GCVE-0-2011-4415)
Vulnerability from cvelistv5 – Published: 2011-11-08 11:00 – Updated: 2024-08-07 00:09
VLAI
EPSS
VEX
Summary
The ap_pregsub function in server/util.c in the Apache HTTP Server 2.0.x through 2.0.64 and 2.2.x through 2.2.21, when the mod_setenvif module is enabled, does not restrict the size of values of environment variables, which allows local users to cause a denial of service (memory consumption or NULL pointer dereference) via a .htaccess file with a crafted SetEnvIf directive, in conjunction with a crafted HTTP request header, related to (1) the "len +=" statement and (2) the apr_pcalloc function call, a different vulnerability than CVE-2011-3607.
Severity
No CVSS data available.
CWE
- n/a
Assigner
References
4 references
| URL | Tags |
|---|---|
| http://h20000.www2.hp.com/bizsupport/TechSupport/… | vendor-advisoryx_refsource_HP |
| http://www.halfdog.net/Security/2011/ApacheModSet… | x_refsource_MISC |
| http://www.gossamer-threads.com/lists/apache/dev/403775 | x_refsource_CONFIRM |
| http://www.halfdog.net/Security/2011/ApacheModSet… | x_refsource_MISC |
Date Public
2011-11-02 00:00
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"baseScore": 1.2,
"confidentialityImpact": "NONE",
"integrityImpact": "NONE",
"vectorString": "AV:L/AC:H/Au:N/C:N/I:N/A:P",
"version": "2.0"
},
"exploitabilityScore": 1.9,
"impactScore": 2.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2011-11-08T11:55:05.850",
"references": [
{
"source": "cve@mitre.org",
"url": "http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041"
},
{
"source": "cve@mitre.org",
"url": "http://www.gossamer-threads.com/lists/apache/dev/403775"
},
{
"source": "cve@mitre.org",
"tags": [
"Exploit",
"Patch"
],
"url": "http://www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/"
},
{
"source": "cve@mitre.org",
"tags": [
"Exploit"
],
"url": "http://www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/DemoExploit.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://h20000.www2.hp.com/bizsupport/TechSupport/Document.jsp?objectID=c03360041"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.gossamer-threads.com/lists/apache/dev/403775"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Patch"
],
"url": "http://www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit"
],
"url": "http://www.halfdog.net/Security/2011/ApacheModSetEnvIfIntegerOverflow/DemoExploit.html"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-20"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
},
"redhat_vex": {
"aggregate_severity": "Low",
"current_release_date": "2026-05-14T15:18:52+00:00",
"cve": "CVE-2011-4415",
"id": "CVE-2011-4415",
"initial_release_date": "2011-11-02T00:00:00+00:00",
"product_status:known_affected": "10",
"source": "Red Hat CSAF VEX",
"status": "final",
"title": "httpd: SetEnvIf resource exhaustion",
"url": "https://security.access.redhat.com/data/csaf/v2/vex/2011/cve-2011-4415.json",
"version": "3"
}
}
}
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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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