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CVE-2006-2374

MediumPublished

The Server Message Block (SMB) driver (MRXSMB.SYS) in Microsoft Windows 2000 SP4, XP SP1 and SP2, and Server 2003 SP1 and earlier allows local users to...

Published: Jun 13, 2006
Updated: Aug 7, 2024
Assigning CNA: microsoft
Evidence observed: Jun 13, 2006

Primary CVSS

5.5/ 10Medium

nvd · CVSS 3.1

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

EPSS probability estimate

1.7%

Low · next 30 days

Percentile: 76.5%
Model date: Sep 21, 2026

EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.

Summary

The Server Message Block (SMB) driver (MRXSMB.SYS) in Microsoft Windows 2000 SP4, XP SP1 and SP2, and Server 2003 SP1 and earlier allows local users to cause a denial of service (hang) by calling the MrxSmbCscIoctlCloseForCopyChunk with the file handle of the shadow device, which results in a deadlock, aka the "SMB Invalid Handle Vulnerability."

Sources

Microsoft Windows XP/2000 - 'Mrxsmb.sys' Local Privilege Escalation (MS06-030)Exploit
Ruben Santamarta · windows · Jun 14, 2006
Microsoft SMB Driver - Local Denial of ServiceExploit
Ruben Santamarta · windows · Jun 13, 2006

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