Executive Summary

Summary
Title Vulnerability in Microsoft Active Accessibility Could Allow Remote Code Execution (2623699)
Informations
Name MS11-075 First vendor Publication 2011-10-11
Vendor Microsoft Last vendor Modification 2011-10-25
Severity (Vendor) Important Revision 1.2

Security-Database Scoring CVSS v3

Cvss vector : N/A
Overall CVSS Score NA
Base Score NA Environmental Score NA
impact SubScore NA Temporal Score NA
Exploitabality Sub Score NA
 
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Security-Database Scoring CVSS v2

Cvss vector : (AV:N/AC:M/Au:N/C:C/I:C/A:C)
Cvss Base Score 9.3 Attack Range Network
Cvss Impact Score 10 Attack Complexity Medium
Cvss Expoit Score 8.6 Authentication None Required
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Detail

Severity Rating: Important

Revision Note: V1.2 (October 25, 2011): Revised the update file names for 32-bit and x64-based editions of Windows XP and Windows Server 2003, in accordance with the schema documented in Microsoft Knowledgebase Article KB816915. This is a change to file names only. There were no changes to the detection logic or update content. Customers who have already successfully installed this update do not need to take any action.

Summary: This security update resolves a privately reported vulnerability in the Microsoft Active Accessibility component. The vulnerability could allow remote code execution if an attacker convinces a user to open a legitimate file that is located in the same network directory as a specially crafted dynamic link library (DLL) file. Then, while opening the legitimate file, the Microsoft Active Accessibility component could attempt to load the DLL file and execute any code it contained. For an attack to be successful, a user must visit an untrusted remote file system location or WebDAV share and open a document from this location that is then loaded by a vulnerable application.

Original Source

Url : http://technet.microsoft.com/en-us/security/bulletin/ms11-075

OVAL Definitions

Definition Id: oval:org.mitre.oval:def:13116
 
Oval ID: oval:org.mitre.oval:def:13116
Title: Active Accessibility Insecure Library Loading Vulnerability
Description: Untrusted search path vulnerability in the Microsoft Active Accessibility component 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 allows local users to gain privileges via a Trojan horse DLL in the current working directory, aka "Active Accessibility Insecure Library Loading Vulnerability."
Family: windows Class: vulnerability
Reference(s): CVE-2011-1247
Version: 3
Platform(s): Microsoft Windows XP
Microsoft Windows Vista
Microsoft Windows 7
Microsoft Windows Server 2003
Microsoft Windows Server 2008
Microsoft Windows Server 2008 R2
Product(s):
Definition Synopsis:

CPE : Common Platform Enumeration

TypeDescriptionCount
Os 1
Os 3
Os 1
Os 5
Os 1
Os 2

OpenVAS Exploits

Date Description
2011-10-12 Name : Microsoft Active Accessibility Remote Code Execution Vulnerability (2623699)
File : nvt/secpod_ms11-075.nasl

Open Source Vulnerability Database (OSVDB)

Id Description
76231 Microsoft Windows Active Accessibility Path Subversion Arbitrary DLL Injectio...

Microsoft Windows Active Accessibility is prone to a flaw in the way it loads dynamic-link libraries (DLL). The program uses a fixed path to look for specific files or libraries. This path includes directories that may not be trusted or under user control. By placing a custom version of the file or library in the path, the program will load it before the legitimate version. This allows an attacker to inject custom code that will be run with the privilege of the program or user executing the program. This can be done by tricking a user into opening an unspecified file from the local file system or a USB drive in some cases. This attack can be leveraged remotely in some cases by placing the malicious file or library on a network share or extracted archive downloaded from a remote source.

Information Assurance Vulnerability Management (IAVM)

Date Description
2011-10-13 IAVM : 2011-A-0138 - Microsoft Active Accessibility Remote Code Execution Vulnerability
Severity : Category II - VMSKEY : V0030402

Snort® IPS/IDS

Date Description
2014-01-10 Microsoft products oleacc.dll dll-load exploit attempt
RuleID : 20254 - Revision : 10 - Type : OS-WINDOWS
2014-01-10 Microsoft products oleacc.dll dll-load exploit attempt
RuleID : 20253 - Revision : 10 - Type : OS-WINDOWS

Nessus® Vulnerability Scanner

Date Description
2011-10-11 Name : The remote Windows host contains a component that could allow remote code exe...
File : smb_nt_ms11-075.nasl - Type : ACT_GATHER_INFO

Alert History

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0
1
2
Date Informations
2014-02-17 11:47:07
  • Multiple Updates
2014-01-19 21:30:44
  • Multiple Updates
2013-11-11 12:41:25
  • Multiple Updates