fkie_cve-2006-6730
Vulnerability from fkie_nvd
Published
2006-12-26 23:28
Modified
2025-04-09 00:30
Severity ?
Summary
OpenBSD and NetBSD permit usermode code to kill the display server and write to the X.Org /dev/xf86 device, which allows local users with root privileges to reduce securelevel by replacing the System Management Mode (SMM) handler via a write to an SMRAM address within /dev/xf86 (aka the video card memory-mapped I/O range), and then launching the new handler via a System Management Interrupt (SMI), as demonstrated by a write to Programmed I/O port 0xB2.
References
{
"configurations": [
{
"nodes": [
{
"cpeMatch": [
{
"criteria": "cpe:2.3:o:netbsd:netbsd:2.0.4:*:*:*:*:*:*:*",
"matchCriteriaId": "36419DD6-0DB4-4BB6-A35F-D8FDB89402F1",
"vulnerable": true
},
{
"criteria": "cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*",
"matchCriteriaId": "CA3CDD3C-DBA6-4BA2-967D-AD746822F3CF",
"vulnerable": true
}
],
"negate": false,
"operator": "OR"
}
]
}
],
"cveTags": [],
"descriptions": [
{
"lang": "en",
"value": "OpenBSD and NetBSD permit usermode code to kill the display server and write to the X.Org /dev/xf86 device, which allows local users with root privileges to reduce securelevel by replacing the System Management Mode (SMM) handler via a write to an SMRAM address within /dev/xf86 (aka the video card memory-mapped I/O range), and then launching the new handler via a System Management Interrupt (SMI), as demonstrated by a write to Programmed I/O port 0xB2."
},
{
"lang": "es",
"value": "OpenBSD y NetBSD permiten al c\u00f3digo en modo de usuario matar el servidor de pantalla y escribir en dispositivo X.Org /dev/xf86, lo cual permite a usuarios locales con privilegios de root reducir el nivel de seguridad reemplazando el manejador del Modo de Administraci\u00f3n de Sistema (System Management Mode o SMM) mediante una escritura a una direcci\u00f3n SMRAM dentro de /dev/xf86 (esto es el rango de E/S mapeado en memoria para la tarjeta de v\u00eddeo), y entonces lanzando el nuevo manejador mediante una Interrupci\u00f3n de Administraci\u00f3n de Sistema (System Management Interrupt o SMI), tal y como se ha demostrado con una escritura al puerto de E/S Programada 0xB2."
}
],
"id": "CVE-2006-6730",
"lastModified": "2025-04-09T00:30:58.490",
"metrics": {
"cvssMetricV2": [
{
"acInsufInfo": false,
"baseSeverity": "MEDIUM",
"cvssData": {
"accessComplexity": "MEDIUM",
"accessVector": "LOCAL",
"authentication": "SINGLE",
"availabilityImpact": "COMPLETE",
"baseScore": 6.6,
"confidentialityImpact": "COMPLETE",
"integrityImpact": "COMPLETE",
"vectorString": "AV:L/AC:M/Au:S/C:C/I:C/A:C",
"version": "2.0"
},
"exploitabilityScore": 2.7,
"impactScore": 10.0,
"obtainAllPrivilege": false,
"obtainOtherPrivilege": false,
"obtainUserPrivilege": false,
"source": "nvd@nist.gov",
"type": "Primary",
"userInteractionRequired": false
}
]
},
"published": "2006-12-26T23:28:00.000",
"references": [
{
"source": "cve@mitre.org",
"url": "http://lists.freedesktop.org/archives/xorg/2004-June/000927.html"
},
{
"source": "cve@mitre.org",
"url": "http://www.cansecwest.com/slides06/csw06-duflot.ppt"
},
{
"source": "cve@mitre.org",
"url": "http://www.securityfocus.com/archive/1/454379/100/0/threaded"
},
{
"source": "cve@mitre.org",
"url": "http://www.securityfocus.com/archive/1/454510/100/0/threaded"
},
{
"source": "cve@mitre.org",
"url": "http://www.securityfocus.com/archive/1/454706/100/0/threaded"
},
{
"source": "cve@mitre.org",
"url": "http://www.ssi.gouv.fr/fr/sciences/fichiers/lti/cansecwest2006-duflot-paper.pdf"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://lists.freedesktop.org/archives/xorg/2004-June/000927.html"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.cansecwest.com/slides06/csw06-duflot.ppt"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/archive/1/454379/100/0/threaded"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/archive/1/454510/100/0/threaded"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.securityfocus.com/archive/1/454706/100/0/threaded"
},
{
"source": "af854a3a-2127-422b-91ae-364da2661108",
"url": "http://www.ssi.gouv.fr/fr/sciences/fichiers/lti/cansecwest2006-duflot-paper.pdf"
}
],
"sourceIdentifier": "cve@mitre.org",
"vulnStatus": "Deferred",
"weaknesses": [
{
"description": [
{
"lang": "en",
"value": "NVD-CWE-Other"
}
],
"source": "nvd@nist.gov",
"type": "Primary"
}
]
}
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Sightings
| Author | Source | Type | Date |
|---|
Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.
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