CVE-2006-6730

Description

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.

6.6

CVSS

Severity: Medium

CVSS 2.0 •

EPSS 0.05%

Affected: n/a n/a

References

Link	Tags
http://www.securityfocus.com/archive/1/454510/100/0/threaded	mailing list
http://lists.freedesktop.org/archives/xorg/2004-June/000927.html	mailing list
http://www.securityfocus.com/archive/1/454706/100/0/threaded	mailing list
http://www.ssi.gouv.fr/fr/sciences/fichiers/lti/cansecwest2006-duflot-paper.pdf
http://www.cansecwest.com/slides06/csw06-duflot.ppt
http://www.securityfocus.com/archive/1/454379/100/0/threaded	mailing list

Frequently Asked Questions

What is the severity of CVE-2006-6730?: CVE-2006-6730 has been scored as a medium severity vulnerability.
How to fix CVE-2006-6730?: To fix CVE-2006-6730, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2006-6730 being actively exploited in the wild?: As for now, there are no information to confirm that CVE-2006-6730 is being actively exploited. According to its EPSS score, there is a ~0% probability that this vulnerability will be exploited by malicious actors in the next 30 days.

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