CVE-2006-6730

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Summary

CVECVE-2006-6730
StatePUBLISHED
Assignermitre
Source PriorityCVE Program / NVD first with legacy fallback
Published2006-12-26 23:28:00 UTC
Updated2026-04-23 00:35:47 UTC
DescriptionOpenBSD 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.

Risk And Classification

Primary CVSS: v2.0 6.6 from [email protected]

AV:L/AC:M/Au:S/C:C/I:C/A:C

Problem Types: NVD-CWE-Other | n/a

CVSS v2.0 Breakdown

Access Vector
Local
Access Complexity
Medium
Authentication
Single
Confidentiality
Complete
Integrity
Complete
Availability
Complete

AV:L/AC:M/Au:S/C:C/I:C/A:C

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Operating System Netbsd Netbsd 2.0.4 All All All
Operating System Openbsd Openbsd All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Na N/a affected n/a Not specified

References

ReferenceSourceLinkTags
SecurityFocus af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
SecurityFocus af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
SecurityFocus af854a3a-2127-422b-91ae-364da2661108 www.securityfocus.com
[Xorg] DRI merging af854a3a-2127-422b-91ae-364da2661108 lists.freedesktop.org
Using CPU System Management Mode to Circumvent Operating System Security Functions | Agence nationale de la sécurité des systèmes d'information af854a3a-2127-422b-91ae-364da2661108 www.ssi.gouv.fr
www.cansecwest.com/slides06/csw06-duflot.ppt af854a3a-2127-422b-91ae-364da2661108 www.cansecwest.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

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