{"id":"CVE-2006-6730","aliases":["EUVD-2006-6713","GHSA-83jc-959v-qgmc"],"status":"published","title":"OpenBSD and NetBSD permit usermode code to kill the display server and write to the X.Org /dev...","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.","severity":{"version":"2.0","score":6.6,"vector":"AV:L/AC:M/Au:S/C:C/I:C/A:C","level":"medium","assessor":"primary","from":"nvd"},"epss":{"day":"2026-11-09","score":0.00259,"percentile":0.17641,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":false},"published":"2006-12-26T23:00:00Z","modified":"2026-06-16T22:33:40Z","products":[{"vendor":"netbsd","product":"netbsd"},{"vendor":"openbsd","product":"openbsd"}],"references":[{"url":"http://www.securityfocus.com/archive/1/454510/100/0/threaded","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"http://lists.freedesktop.org/archives/xorg/2004-June/000927.html","tags":["mailing-list","x_refsource_MLIST","x_transferred"]},{"url":"http://www.securityfocus.com/archive/1/454706/100/0/threaded","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"http://www.ssi.gouv.fr/fr/sciences/fichiers/lti/cansecwest2006-duflot-paper.pdf","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://www.cansecwest.com/slides06/csw06-duflot.ppt","tags":["x_refsource_MISC","x_transferred"]},{"url":"http://www.securityfocus.com/archive/1/454379/100/0/threaded","tags":["mailing-list","x_refsource_BUGTRAQ","x_transferred"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2006-6730"},{"url":"https://github.com/advisories/GHSA-83jc-959v-qgmc"}],"sources":{"cve":[{"id":"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.","status":"published","published":"2006-12-26T23:00:00Z","modified":"2024-08-07T20:34:00.547Z","updated_at":"2026-11-02T14:33:50.024504Z"}],"euvd":[{"id":"EUVD-2006-6713","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.","status":"published","published":"2006-12-26T23:00:00Z","modified":"2024-08-07T20:34:00Z","updated_at":"2026-11-03T01:15:42.481414Z"}],"ghsa":[{"id":"GHSA-83jc-959v-qgmc","title":"OpenBSD and NetBSD permit usermode code to kill the display server and write to the X.Org /dev...","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.","status":"published","published":"2022-05-01T07:40:49Z","modified":"2023-01-31T05:02:34Z","updated_at":"2026-11-02T14:48:17.45489Z"}],"nvd":[{"id":"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.","status":"published","published":"2006-12-26T23:28:00Z","modified":"2026-06-16T22:33:40.807Z","cvss":[{"version":"2.0","score":6.6,"vector":"AV:L/AC:M/Au:S/C:C/I:C/A:C","level":"medium","assessor":"primary"}],"updated_at":"2026-11-02T14:01:09.852738Z"}]}}