Microsoft Windows 2000/Server 2003/XP MRXSMB.SYS MRxSmbCscIoctlOpenForCopyChunk access control

CVSS Meta Temp Score
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5.7$0-$5k0.00

A vulnerability was found in Microsoft Windows 2000/Server 2003/XP (Operating System). It has been declared as problematic. Affected by this vulnerability is the function MRxSmbCscIoctlOpenForCopyChunk of the file MRXSMB.SYS. The manipulation with an unknown input leads to a access control vulnerability. The CWE definition for the vulnerability is CWE-264. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

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 execute arbitrary code by calling the MrxSmbCscIoctlOpenForCopyChunk function with the METHOD_NEITHER method flag and an arbitrary address, possibly for kernel memory, aka the "SMB Driver Elevation of Privilege Vulnerability."

The issue has been introduced in 02/17/2000. The weakness was released 06/13/2006 by Ruben Santamarta with iDEFENSE as MS06-030 as confirmed bulletin (Technet). It is possible to read the advisory at microsoft.com. This vulnerability is known as CVE-2006-2373 since 05/15/2006. The attack can only be done within the local network. The exploitation doesn't need any form of authentication. Technical details and also a public exploit are known. The attack technique deployed by this issue is T1068 according to MITRE ATT&CK.

After immediately, there has been an exploit disclosed. It is possible to download the exploit at exploit-db.com. It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2308 days. During that time the estimated underground price was around $25k-$100k. The vulnerability scanner Nessus provides a plugin with the ID 21692 (MS06-030: Vulnerability in Server Message Block Could Allow Elevation of Privilege (914389)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family Windows : Microsoft Bulletins and running in the context l. The commercial vulnerability scanner Qualys is able to test this issue with plugin 90323 (Microsoft Windows SMB Could Allow Elevation of Privileges (MS06-030)).

Applying the patch MS06-030 is able to eliminate this problem. The bugfix is ready for download at microsoft.com. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the databases at X-Force (26828), Tenable (21692) and Exploit-DB (1910). Entry connected to this vulnerability is available at 30802.

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  • end of life (old version)

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CVSSv3info

VulDB Meta Base Score: 6.3
VulDB Meta Temp Score: 5.7

VulDB Base Score: 6.3
VulDB Temp Score: 5.7
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CVSSv2info

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Exploitinginfo

Class: Access control
CWE: CWE-264
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ATT&CK: 🔍

Local: No
Remote: Partially

Availability: 🔍
Access: Public
Status: Proof-of-Concept
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Nessus ID: 21692
Nessus Name: MS06-030: Vulnerability in Server Message Block Could Allow Elevation of Privilege (914389)
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Countermeasuresinfo

Recommended: Patch
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Patch: MS06-030
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Timelineinfo

02/17/2000 🔍
05/15/2006 +2279 days 🔍
06/13/2006 +29 days 🔍
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06/19/2006 +5 days 🔍
06/20/2019 +4749 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS06-030
Researcher: Ruben Santamarta
Organization: iDEFENSE
Status: Confirmed

CVE: CVE-2006-2373 (🔍)
OVAL: 🔍

X-Force: 26828
SecurityTracker: 1016288
Vulnerability Center: 11923 - [MS06-030] Microsoft Windows Server Message Block (SMB) Driver Privilege Escalation, High
SecurityFocus: 18356 - Microsoft Windows SMB Driver Local Privilege Escalation Vulnerability
Secunia: 20635 - Windows SMB Denial of Service and Privilege Escalation, Less Critical
OSVDB: 26440 - Microsoft Windows SMB MrxSmbCscIoctlOpenForCopyChunk Function Overflow
Vupen: ADV-2006-2327

scip Labs: https://www.scip.ch/en/?labs.20161013
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Entryinfo

Created: 06/19/2006 16:46
Updated: 06/20/2019 17:25
Changes: 06/19/2006 16:46 (105), 06/20/2019 17:25 (1)
Complete: 🔍

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