CVE-2006-6730
Medium
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.
SeverityMedium
CVSS6.6
Exploit probability—
ProductNetbsd
PublishedDec 26, 2006
First seenDec 26, 2006
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| netbsd netbsd | 2.0.4 | — |
| openbsd openbsd | No range specified | — |
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