CVE-2006-6730
First published: Tue Dec 26 2006(Updated: )
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.
Credit: cve@mitre.org
| Affected Software | Affected Version | How to fix |
|---|---|---|
| NetBSD NetBSD | =2.0.4 | |
| Openbsd Openbsd |
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Reference Links
- http://www.securityfocus.com/archive/1/454510/100/0/threaded
- http://www.securityfocus.com/archive/1/454706/100/0/threaded
- http://lists.freedesktop.org/archives/xorg/2004-June/000927.html
- http://www.cansecwest.com/slides06/csw06-duflot.ppt
- http://www.ssi.gouv.fr/fr/sciences/fichiers/lti/cansecwest2006-duflot-paper.pdf
- http://www.securityfocus.com/archive/1/454379/100/0/threaded
- agent/references
- agent/weakness
- agent/severity
- agent/author
- agent/type
- agent/description
- agent/event
- agent/softwarecombine
- agent/first-publish-date
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- agent/tags
- collector/nvd-historical
- vendor/netbsd
- product/netbsd
- canonical/netbsd netbsd
- vendor/openbsd
- product/openbsd
- canonical/openbsd openbsd
- agent/software-canonical-lookup-request
- collector/nvd-index
- version/netbsd netbsd/2.0.4