FKIE_CVE-2011-2766
Vulnerability from fkie_nvd - Published: 2011-09-23 10:55 - Updated: 2026-06-16 23:31
Severity
Summary
The FCGI (aka Fast CGI) module 0.70 through 0.73 for Perl, as used by CGI::Fast, uses environment variable values from one request during processing of a later request, which allows remote attackers to bypass authentication via crafted HTTP headers.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| fast_cgi_project | fast_cgi | * | |
| debian | debian_linux | 5.0 | |
| debian | debian_linux | 6.0 | |
| debian | debian_linux | 7.0 |
{
"affected": [
{
"affectedData": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"source": "cve@mitre.org"
}
],
"configurations": [
{
"nodes": [
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"cpeMatch": [
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"matchCriteriaId": "16AEBF10-D97B-4BC0-AF31-892ECA37EB06",
"versionEndIncluding": "0.73",
"versionStartIncluding": "0.70",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
},
{
"nodes": [
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"vulnerable": true
},
{
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}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The FCGI (aka Fast CGI) module 0.70 through 0.73 for Perl, as used by CGI::Fast, uses environment variable values from one request during processing of a later request, which allows remote attackers to bypass authentication via crafted HTTP headers."
},
{
"lang": "es",
"value": "El m\u00f3dulo FCGI (tambi\u00e9n conocido como Fast CGI) v0.70 hasta v0.73 para Perl, como se usa en CGI::Fast, usa valores de variables de entorno para una peticni\u00f3n durante el procesado de una petici\u00f3n posterior, lo que permite a atacantes remotos eludir la autenticaci\u00f3n a trav\u00e9s de cabeceras HTTP modificadas."
}
],
"id": "CVE-2011-2766",
"lastModified": "2026-06-16T23:31:57.633",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "HIGH",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "PARTIAL",
"baseScore": 7.5,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:P",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 6.4,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2011-09-23T10:55:03.240",
"references": [
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"url": "http://www.debian.org/security/2011/dsa-2327"
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{
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{
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},
{
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],
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/69709"
},
{
"source": "cve@mitre.org",
"tags": [
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],
"url": "https://hermes.opensuse.org/messages/13154637"
},
{
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"tags": [
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],
"url": "https://hermes.opensuse.org/messages/13155253"
},
{
"source": "cve@mitre.org",
"tags": [
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],
"url": "https://rt.cpan.org/Public/Bug/Display.html?id=68380"
},
{
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"tags": [
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{
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"tags": [
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{
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},
{
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"tags": [
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],
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},
{
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],
"url": "http://www.openwall.com/lists/oss-security/2011/09/08/2"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"VDB Entry"
],
"url": "http://www.securityfocus.com/bid/49549"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Exploit",
"Issue Tracking",
"Third Party Advisory"
],
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},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
"Third Party Advisory",
"VDB Entry"
],
"url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/69709"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"url": "https://hermes.opensuse.org/messages/13154637"
},
{
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"tags": [
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"url": "https://hermes.opensuse.org/messages/13155253"
},
{
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"tags": [
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"Third Party Advisory"
],
"url": "https://rt.cpan.org/Public/Bug/Display.html?id=68380"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-287"
}
],
"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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