CVE-2006-6730 - OpenBSD and NetBSD permit usermode code to kill the display server and write to the X.Org /dev/xf86

CVE-2006-6730

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

Vulnerable Configurations

cpe:2.3:o:netbsd:netbsd:2.0.4:*:*:*:*:*:*:*
cpe:2.3:o:netbsd:netbsd:2.0.4:*:*:*:*:*:*:*
cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*
cpe:2.3:o:openbsd:openbsd:*:*:*:*:*:*:*:*

CVSS

Base:	6.6 (as of 17-10-2018 - 21:49)
Impact:
Exploitability:

CWE

NVD-CWE-Other

CAPEC

Access

Vector	Complexity	Authentication
LOCAL	MEDIUM	SINGLE

Impact

Confidentiality	Integrity	Availability
COMPLETE	COMPLETE	COMPLETE

cvss-vector via4

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

refmap via4

bugtraq	20061214 The (in)security of Xorg and DRI 20061215 Re: The (in)security of Xorg and DRI 20061218 Re: The (in)security of Xorg and DRI
misc	http://www.cansecwest.com/slides06/csw06-duflot.ppt http://www.ssi.gouv.fr/fr/sciences/fichiers/lti/cansecwest2006-duflot-paper.pdf
mlist	[Xorg] 20040613 DRI merging

Last major update

17-10-2018 - 21:49

Published

26-12-2006 - 23:28

Last modified

17-10-2018 - 21:49