CVE-2006-6730 | Date: (C)2006-12-26 (M)2023-12-22 |
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.
CVSS Score and Metrics +CVSS Score and Metrics -CVSS V2 Severity: |
CVSS Score : 6.6 |
Exploit Score: 2.7 |
Impact Score: 10.0 |
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CVSS V2 Metrics: |
Access Vector: LOCAL |
Access Complexity: MEDIUM |
Authentication: |
Confidentiality: COMPLETE |
Integrity: COMPLETE |
Availability: COMPLETE |
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