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CVE-2006-6730

UnknownEPSS 0.25%

Last modified

CVE-2006-6730 is a vulnerability of currently unknown severity. 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.. EPSS estimates a 0.25% chance of exploitation in the next 30 days.

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.

Metrics

EPSS Probability
0.25%

16.1th percentile

Probability of exploitation in the next 30 days. Learn more

Affected Software

VendorProductVersions
NetbsdNetbsd2.0.4
OpenbsdOpenbsdAll versions

References

Timeline

Published
Last Modified
Status
Modified

Frequently Asked Questions

What is CVE-2006-6730?
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.
How severe is CVE-2006-6730?
Severity scoring for CVE-2006-6730 is pending analysis. The EPSS model estimates a 0.25% probability of exploitation in the next 30 days.
How do I fix CVE-2006-6730?
Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

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Source: NVD / NIST