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.
Metrics
Affected Vendors & Products
References
History
No history.
MITRE
Status: PUBLISHED
Assigner: mitre
Published: 2006-12-26T23:00:00
Updated: 2024-08-07T20:34:00.547Z
Reserved: 2006-12-26T00:00:00
Link: CVE-2006-6730
Vulnrichment
No data.
NVD
Status : Modified
Published: 2006-12-26T23:28:00.000
Modified: 2024-11-21T00:23:30.530
Link: CVE-2006-6730
Redhat
No data.