Description
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."
Public exploits
Exploit or proof-of-concept code for this vulnerability is publicly available, which lowers the bar for attackers. Treat it as a reason to patch sooner.
Third-party code, not reviewed by us. Public PoCs are sometimes fake or contain malware. Read the code first and run it only in an isolated lab, against systems you are authorised to test.
Exploit-DB 2
- Microsoft Windows XP/2000 - 'Mrxsmb.sys' Local Privilege Escalation (MS06-030) EDB-1911 · local · Jun 14, 2006 · verified
- Microsoft SMB Driver - Local Denial of Service EDB-28001 · dos · Jun 13, 2006 · verified
Sources: PoC-in-GitHub, Metasploit Framework, Exploit-DB — updated daily. Only links are listed; no exploit code is hosted here.
References
- 1016288 vdb-entry
- oval:org.mitre.oval:def:1827 vdb-entry signature
- oval:org.mitre.oval:def:1841 vdb-entry signature
- oval:org.mitre.oval:def:2030 vdb-entry signature
- win-smb-dos(26830) vdb-entry
- ADV-2006-2327 vdb-entry
- oval:org.mitre.oval:def:1979 vdb-entry signature
- 20060613 Windows MRXSMB.SYS MrxSmbCscIoctlCloseForCopyChunk DoS third-party-advisory
- oval:org.mitre.oval:def:1850 vdb-entry signature
- MS06-030 vendor-advisory
- oval:org.mitre.oval:def:2060 vdb-entry signature
- 20635 third-party-advisory
- 26439 vdb-entry
- 18357 vdb-entry