FKIE_CVE-2016-7943
Vulnerability from fkie_nvd - Published: 2016-12-13 20:59 - Updated: 2026-06-17 00:53
Severity
Summary
The XListFonts function in X.org libX11 before 1.6.4 might allow remote X servers to gain privileges via vectors involving length fields, which trigger out-of-bounds write operations.
References
Impacted products
| Vendor | Product | Version | |
|---|---|---|---|
| fedoraproject | fedora | 25 | |
| x.org | libx11 | * |
{
"affected": [
{
"affectedData": [
{
"product": "n/a",
"vendor": "n/a",
"versions": [
{
"status": "affected",
"version": "n/a"
}
]
}
],
"source": "security@opentext.com"
}
],
"configurations": [
{
"nodes": [
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"criteria": "cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:*",
"matchCriteriaId": "772E9557-A371-4664-AE2D-4135AAEB89AA",
"vulnerable": true
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"negate": false,
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{
"nodes": [
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"matchCriteriaId": "BB918EC4-C59E-46FD-BC0C-34AC76E0C1A2",
"versionEndIncluding": "1.6.3",
"vulnerable": true
}
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"operator": "OR"
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],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "The XListFonts function in X.org libX11 before 1.6.4 might allow remote X servers to gain privileges via vectors involving length fields, which trigger out-of-bounds write operations."
},
{
"lang": "es",
"value": "La funci\u00f3n XListFonts en X.org libX11 en versiones anteriores a 1.6.4 podr\u00eda permitir a servidores remotos X obtener privilegios a trav\u00e9s de vectores que involucran campos de longitud, que desencadena operaciones de escritura fuera de l\u00edmites."
}
],
"id": "CVE-2016-7943",
"lastModified": "2026-06-17T00:53:47.893",
"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
}
],
"cvssMetricV30": [
{
"cvssData": {
"attackComplexity": "LOW",
"attackVector": "NETWORK",
"availabilityImpact": "HIGH",
"baseScore": 9.8,
"baseSeverity": "CRITICAL",
"confidentialityImpact": "HIGH",
"integrityImpact": "HIGH",
"privilegesRequired": "NONE",
"scope": "UNCHANGED",
"userInteraction": "NONE",
"vectorString": "CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"version": "3.0"
},
"exploitabilityScore": 3.9,
"impactScore": 5.9,
"source": "nvd@nist.gov",
"type": "Primary"
}
]
},
"published": "2016-12-13T20:59:07.520",
"references": [
{
"source": "security@opentext.com",
"url": "http://www.openwall.com/lists/oss-security/2016/10/04/2"
},
{
"source": "security@opentext.com",
"url": "http://www.openwall.com/lists/oss-security/2016/10/04/4"
},
{
"source": "security@opentext.com",
"url": "http://www.securityfocus.com/bid/93362"
},
{
"source": "security@opentext.com",
"url": "http://www.securitytracker.com/id/1036945"
},
{
"source": "security@opentext.com",
"url": "https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=8c29f1607a31dac0911e45a0dd3d74173822b3c9"
},
{
"source": "security@opentext.com",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMCVDXMFPXR7QGMKDG22WPPJCXH2X3L7/"
},
{
"source": "security@opentext.com",
"url": "https://lists.x.org/archives/xorg-announce/2016-October/002720.html"
},
{
"source": "security@opentext.com",
"url": "https://security.gentoo.org/glsa/201704-03"
},
{
"source": "security@opentext.com",
"url": "https://usn.ubuntu.com/3758-1/"
},
{
"source": "security@opentext.com",
"url": "https://usn.ubuntu.com/3758-2/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.openwall.com/lists/oss-security/2016/10/04/2"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.openwall.com/lists/oss-security/2016/10/04/4"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/bid/93362"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securitytracker.com/id/1036945"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://cgit.freedesktop.org/xorg/lib/libX11/commit/?id=8c29f1607a31dac0911e45a0dd3d74173822b3c9"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/GMCVDXMFPXR7QGMKDG22WPPJCXH2X3L7/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://lists.x.org/archives/xorg-announce/2016-October/002720.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://security.gentoo.org/glsa/201704-03"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://usn.ubuntu.com/3758-1/"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "https://usn.ubuntu.com/3758-2/"
}
],
"sourceIdentifier": "security@opentext.com",
"vulnStatus": "Modified",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "CWE-787"
}
],
"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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