FKIE_CVE-2015-4520
Vulnerability from fkie_nvd - Published: 2015-09-24 04:59 - Updated: 2026-06-17 00:27
Severity
Summary
Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3 allow remote attackers to bypass CORS preflight protection mechanisms by leveraging (1) duplicate cache-key generation or (2) retrieval of a value from an incorrect HTTP Access-Control-* response header.
References
{
"affected": [
{
"affectedData": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"source": "security@mozilla.org"
}
],
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"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "Mozilla Firefox before 41.0 and Firefox ESR 38.x before 38.3 allow remote attackers to bypass CORS preflight protection mechanisms by leveraging (1) duplicate cache-key generation or (2) retrieval of a value from an incorrect HTTP Access-Control-* response header."
},
{
"lang": "es",
"value": "Vulnerabilidad en Mozilla Firefox en versiones anteriores a 41.0 y Firefox ESR 38.x en versiones anteriores a 38.3, permite a atacantes remotos eludir los mecanismos de protecci\u00f3n de verificaci\u00f3n CORS preflight aprovechando la (1) generaci\u00f3n de cache-key duplicada o (2) recuperaci\u00f3n de un valor desde una respuesta de cabecera HTTP Acces-Control-* incorrecta."
}
],
"id": "CVE-2015-4520",
"lastModified": "2026-06-17T00:27:28.773",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": true,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "LOW",
"accessVector": "NETWORK",
"authentication": "NONE",
"availabilityImpact": "NONE",
"baseScore": 6.4,
"confidentialityImpact": "PARTIAL",
"integrityImpact": "PARTIAL",
"vectorString": "AV:N/AC:L/Au:N/C:P/I:P/A:N",
"version": "2.0"
},
"exploitabilityScore": 10.0,
"impactScore": 4.9,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2015-09-24T04:59:19.253",
"references": [
{
"source": "security@mozilla.org",
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00000.html"
},
{
"source": "security@mozilla.org",
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00003.html"
},
{
"source": "security@mozilla.org",
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00004.html"
},
{
"source": "security@mozilla.org",
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00005.html"
},
{
"source": "security@mozilla.org",
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00007.html"
},
{
"source": "security@mozilla.org",
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00025.html"
},
{
"source": "security@mozilla.org",
"url": "http://rhn.redhat.com/errata/RHSA-2015-1834.html"
},
{
"source": "security@mozilla.org",
"url": "http://rhn.redhat.com/errata/RHSA-2015-1852.html"
},
{
"source": "security@mozilla.org",
"url": "http://www.debian.org/security/2015/dsa-3365"
},
{
"source": "security@mozilla.org",
"tags": [
"Vendor Advisory"
],
"url": "http://www.mozilla.org/security/announce/2015/mfsa2015-111.html"
},
{
"source": "security@mozilla.org",
"url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"
},
{
"source": "security@mozilla.org",
"url": "http://www.oracle.com/technetwork/topics/security/linuxbulletinoct2015-2719645.html"
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{
"source": "security@mozilla.org",
"url": "http://www.securityfocus.com/bid/76816"
},
{
"source": "security@mozilla.org",
"url": "http://www.securitytracker.com/id/1033640"
},
{
"source": "security@mozilla.org",
"url": "http://www.ubuntu.com/usn/USN-2743-1"
},
{
"source": "security@mozilla.org",
"url": "http://www.ubuntu.com/usn/USN-2743-2"
},
{
"source": "security@mozilla.org",
"url": "http://www.ubuntu.com/usn/USN-2743-3"
},
{
"source": "security@mozilla.org",
"url": "http://www.ubuntu.com/usn/USN-2743-4"
},
{
"source": "security@mozilla.org",
"url": "http://www.ubuntu.com/usn/USN-2754-1"
},
{
"source": "security@mozilla.org",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1200856"
},
{
"source": "security@mozilla.org",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1200869"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00000.html"
},
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"url": "http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00003.html"
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"url": "http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00005.html"
},
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"url": "http://lists.opensuse.org/opensuse-security-announce/2015-10/msg00007.html"
},
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"url": "http://lists.opensuse.org/opensuse-security-announce/2015-11/msg00025.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://rhn.redhat.com/errata/RHSA-2015-1834.html"
},
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"url": "http://rhn.redhat.com/errata/RHSA-2015-1852.html"
},
{
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"url": "http://www.debian.org/security/2015/dsa-3365"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"tags": [
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"url": "http://www.mozilla.org/security/announce/2015/mfsa2015-111.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.oracle.com/technetwork/topics/security/bulletinapr2016-2952098.html"
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{
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"url": "http://www.securityfocus.com/bid/76816"
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"url": "http://www.securitytracker.com/id/1033640"
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{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.ubuntu.com/usn/USN-2743-1"
},
{
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"url": "http://www.ubuntu.com/usn/USN-2743-2"
},
{
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"url": "http://www.ubuntu.com/usn/USN-2743-3"
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{
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"url": "http://www.ubuntu.com/usn/USN-2743-4"
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"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1200856"
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"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=1200869"
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"sourceIdentifier": "security@mozilla.org",
"vulnStatus": "Modified",
"weaknesses": [
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"description": [
{
"lang": "en",
"value": "CWE-254"
}
],
"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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