Microsoft Windows CSRSS Device Event Message access control

CVSS Meta Temp Score
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CTI Interest Score
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9.4$5k-$25k0.00

A vulnerability, which was classified as critical, was found in Microsoft Windows (Operating System) (the affected version is unknown). This affects an unknown code of the component CSRSS Device Event Message Handler. The manipulation with an unknown input leads to a access control vulnerability. CWE is classifying the issue as CWE-264. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Csrsrv.dll in the Client/Server Run-time Subsystem (aka CSRSS) in the Win32 subsystem in Microsoft Windows XP SP2 and SP3, Windows Server 2003 SP2, Windows Vista SP2, Windows Server 2008 SP2, R2, and R2 SP1, and Windows 7 Gold and SP1 does not properly check permissions for sending inter-process device-event messages from low-integrity processes to high-integrity processes, which allows local users to gain privileges via a crafted application, aka "CSRSS Local Privilege Elevation Vulnerability."

The weakness was shared 12/13/2011 by Alex Ionescu with Winsider Seminars & Solutions Inc. as MS11-097 as confirmed bulletin (Technet). The advisory is shared at technet.microsoft.com. This vulnerability is uniquely identified as CVE-2011-3408 since 09/09/2011. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 12/19/2011). MITRE ATT&CK project uses the attack technique T1068 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 57283 (MS11-097: Vulnerability in Windows Client/Server Run-time Subsystem Could Allow Elevation of Privilege (2620712)), 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 90760 (Microsoft Windows Client/Server Run-time Subsystem Elevation of Privilege Vulnerability (MS11-097)).

Upgrading eliminates this vulnerability. Applying the patch MS11-097 is able to eliminate this problem. The bugfix is ready for download at technet.microsoft.com. The best possible mitigation is suggested to be upgrading to the latest version. A possible mitigation has been published immediately after the disclosure of the vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (57283). The entry 4479 is related to this item.

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CPE 2.3info

CPE 2.2info

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CVSSv3info

VulDB Meta Base Score: 9.8
VulDB Meta Temp Score: 9.4

VulDB Base Score: 9.8
VulDB Temp Score: 9.4
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CVSSv2info

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Exploitinginfo

Class: Access control
CWE: CWE-264
ATT&CK: T1068

Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

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Nessus ID: 57283
Nessus Name: MS11-097: Vulnerability in Windows Client/Server Run-time Subsystem Could Allow Elevation of Privilege (2620712)
Nessus File: 🔍
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OpenVAS ID: 902643
OpenVAS Name: Windows Client/Server Run-time Subsystem Privilege Elevation Vulnerability (2620712)
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Threat Intelligenceinfo

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Countermeasuresinfo

Recommended: Upgrade
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Patch: MS11-097

Timelineinfo

09/09/2011 🔍
12/13/2011 +95 days 🔍
12/13/2011 +0 days 🔍
12/13/2011 +0 days 🔍
12/13/2011 +0 days 🔍
12/13/2011 +0 days 🔍
12/19/2011 +6 days 🔍
12/19/2011 +0 days 🔍

Sourcesinfo

Vendor: microsoft.com
Product: microsoft.com

Advisory: MS11-097
Researcher: Alex Ionescu
Organization: Winsider Seminars & Solutions Inc.
Status: Confirmed

CVE: CVE-2011-3408 (🔍)
OVAL: 🔍
IAVM: 🔍

SecurityFocus: 50972 - Microsoft Windows CSRSS CVE-2011-3408 Local Privilege Escalation Vulnerability
Secunia: 47210 - Microsoft Windows CSRSS Device Event Message Privilege Escalation Vulnerability, Less Critical

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Entryinfo

Created: 12/19/2011 01:00
Changes: 12/19/2011 01:00 (86)
Complete: 🔍

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