ID CVE-2011-1260
Summary Microsoft Internet Explorer 8 and 9 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, aka "Layout Memory Corruption Vulnerability."
References
Vulnerable Configurations
  • Microsoft Internet Explorer 8
    cpe:2.3:a:microsoft:ie:8
  • Microsoft Windows 2003 Server Service Pack 2 Itanium
    cpe:2.3:o:microsoft:windows_2003_server:-:sp2:itanium
  • Microsoft Windows 7
    cpe:2.3:o:microsoft:windows_7
  • Microsoft Windows 7
    cpe:2.3:o:microsoft:windows_7
  • Microsoft Windows Server 2003 Service Pack 2
    cpe:2.3:o:microsoft:windows_server_2003:-:sp2
  • cpe:2.3:o:microsoft:windows_server_2008:-:itanium
    cpe:2.3:o:microsoft:windows_server_2008:-:itanium
  • cpe:2.3:o:microsoft:windows_server_2008:-:x32
    cpe:2.3:o:microsoft:windows_server_2008:-:x32
  • cpe:2.3:o:microsoft:windows_server_2008:-:x64
    cpe:2.3:o:microsoft:windows_server_2008:-:x64
  • Windows Server 2008 R2 for Itanium-based Systems
    cpe:2.3:o:microsoft:windows_server_2008:-:r2:itanium
  • Windows Server 2008 R2 for x64-based Systems
    cpe:2.3:o:microsoft:windows_server_2008:-:r2:x64
  • Windows Server 2008 Service Pack 2 for 32-bit systems
    cpe:2.3:o:microsoft:windows_server_2008:-:sp2:x32
  • Microsoft Windows Server 2008 Service Pack 2 x64 (64-bit)
    cpe:2.3:o:microsoft:windows_server_2008:-:sp2:x64
  • Microsoft Windows Server 2008 Service Pack 2 for Itanium-Based Systems
    cpe:2.3:o:microsoft:windows_server_2008:-:sp2:itanium
  • Microsoft Windows Server 2008 r2 Service Pack 1 Itanium
    cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:itanium
  • Microsoft Windows Server 2008 R2 Service Pack 1 x64 (64-bit)
    cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:x64
  • Microsoft Windows Vista Service Pack 1 (initial release)
    cpe:2.3:o:microsoft:windows_vista:-:sp1
  • Microsoft Windows Vista Service Pack 1 x64 (64-bit)
    cpe:2.3:o:microsoft:windows_vista:-:sp1:x64
  • Microsoft Windows Vista Service Pack 2
    cpe:2.3:o:microsoft:windows_vista:-:sp2
  • Microsoft Windows Vista Service Pack 2 x64 (64-bit)
    cpe:2.3:o:microsoft:windows_vista:-:sp2:x64
  • Microsoft Windows Vista Service Pack 1 (initial release)
    cpe:2.3:o:microsoft:windows_vista:-:sp1
  • Microsoft Windows XP Service Pack 3
    cpe:2.3:o:microsoft:windows_xp:-:sp3
  • Microsoft Windows XP Service Pack 2 x64 (64-bit)
    cpe:2.3:o:microsoft:windows_xp:-:sp2:x64
  • Microsoft Internet Explorer 9
    cpe:2.3:a:microsoft:ie:9
  • Microsoft Windows 7
    cpe:2.3:o:microsoft:windows_7
  • Microsoft Windows 7 64-bit Service Pack 1 (initial release)
    cpe:2.3:o:microsoft:windows_7:-:sp1:x64
  • Microsoft Windows 7 x86 Service Pack 1
    cpe:2.3:o:microsoft:windows_7:-:sp1:x86
  • Windows Server 2008 Service Pack 2 for 32-bit systems
    cpe:2.3:o:microsoft:windows_server_2008:-:sp2:x32
  • Microsoft Windows Server 2008 Service Pack 2 x64 (64-bit)
    cpe:2.3:o:microsoft:windows_server_2008:-:sp2:x64
  • Windows Server 2008 R2 for 32-bit Systems
    cpe:2.3:o:microsoft:windows_server_2008:r2:-:x64
  • Microsoft Windows Server 2008 R2 Service Pack 1 x64 (64-bit)
    cpe:2.3:o:microsoft:windows_server_2008:r2:sp1:x64
  • Microsoft Windows Vista Service Pack 2
    cpe:2.3:o:microsoft:windows_vista:-:sp2
  • Microsoft Windows Vista Service Pack 2 x64 (64-bit)
    cpe:2.3:o:microsoft:windows_vista:-:sp2:x64
CVSS
Base: 9.3 (as of 17-06-2011 - 10:29)
Impact:
Exploitability:
CWE CWE-119
CAPEC
  • Buffer Overflow via Environment Variables
    This attack pattern involves causing a buffer overflow through manipulation of environment variables. Once the attacker finds that they can modify an environment variable, they may try to overflow associated buffers. This attack leverages implicit trust often placed in environment variables.
  • Overflow Buffers
    Buffer Overflow attacks target improper or missing bounds checking on buffer operations, typically triggered by input injected by an attacker. As a consequence, an attacker is able to write past the boundaries of allocated buffer regions in memory, causing a program crash or potentially redirection of execution as per the attackers' choice.
  • Client-side Injection-induced Buffer Overflow
    This type of attack exploits a buffer overflow vulnerability in targeted client software through injection of malicious content from a custom-built hostile service.
  • Filter Failure through Buffer Overflow
    In this attack, the idea is to cause an active filter to fail by causing an oversized transaction. An attacker may try to feed overly long input strings to the program in an attempt to overwhelm the filter (by causing a buffer overflow) and hoping that the filter does not fail securely (i.e. the user input is let into the system unfiltered).
  • MIME Conversion
    An attacker exploits a weakness in the MIME conversion routine to cause a buffer overflow and gain control over the mail server machine. The MIME system is designed to allow various different information formats to be interpreted and sent via e-mail. Attack points exist when data are converted to MIME compatible format and back.
  • Overflow Binary Resource File
    An attack of this type exploits a buffer overflow vulnerability in the handling of binary resources. Binary resources may include music files like MP3, image files like JPEG files, and any other binary file. These attacks may pass unnoticed to the client machine through normal usage of files, such as a browser loading a seemingly innocent JPEG file. This can allow the attacker access to the execution stack and execute arbitrary code in the target process. This attack pattern is a variant of standard buffer overflow attacks using an unexpected vector (binary files) to wrap its attack and open up a new attack vector. The attacker is required to either directly serve the binary content to the victim, or place it in a locale like a MP3 sharing application, for the victim to download. The attacker then is notified upon the download or otherwise locates the vulnerability opened up by the buffer overflow.
  • Buffer Overflow via Symbolic Links
    This type of attack leverages the use of symbolic links to cause buffer overflows. An attacker can try to create or manipulate a symbolic link file such that its contents result in out of bounds data. When the target software processes the symbolic link file, it could potentially overflow internal buffers with insufficient bounds checking.
  • Overflow Variables and Tags
    This type of attack leverages the use of tags or variables from a formatted configuration data to cause buffer overflow. The attacker crafts a malicious HTML page or configuration file that includes oversized strings, thus causing an overflow.
  • Buffer Overflow via Parameter Expansion
    In this attack, the target software is given input that the attacker knows will be modified and expanded in size during processing. This attack relies on the target software failing to anticipate that the expanded data may exceed some internal limit, thereby creating a buffer overflow.
  • Buffer Overflow in an API Call
    This attack targets libraries or shared code modules which are vulnerable to buffer overflow attacks. An attacker who has access to an API may try to embed malicious code in the API function call and exploit a buffer overflow vulnerability in the function's implementation. All clients that make use of the code library thus become vulnerable by association. This has a very broad effect on security across a system, usually affecting more than one software process.
  • Buffer Overflow in Local Command-Line Utilities
    This attack targets command-line utilities available in a number of shells. An attacker can leverage a vulnerability found in a command-line utility to escalate privilege to root.
Access
VectorComplexityAuthentication
NETWORK MEDIUM NONE
Impact
ConfidentialityIntegrityAvailability
COMPLETE COMPLETE COMPLETE
exploit-db via4
description MS11-050 IE mshtml!CObjectElement Use After Free. CVE-2011-1260. Remote exploit for windows platform
id EDB-ID:17409
last seen 2016-02-02
modified 2011-06-17
published 2011-06-17
reporter metasploit
source https://www.exploit-db.com/download/17409/
title Microsoft Internet Explorer - mshtml!CObjectElement Use After Free MS11-050
metasploit via4
description This module exploits a use-after-free vulnerability in Internet Explorer. The vulnerability occurs when an invalid <object> tag exists and other elements overlap/cover where the object tag should be when rendered (due to their styles/positioning). The mshtml!CObjectElement is then freed from memory because it is invalid. However, the mshtml!CDisplay object for the page continues to keep a reference to the freed <object> and attempts to call a function on it, leading to the use-after-free. Please note that for IE 8 targets, JRE (Java Runtime Environment) is required to bypass DEP (Data Execution Prevention).
id MSF:EXPLOIT/WINDOWS/BROWSER/MS11_050_MSHTML_COBJECTELEMENT
last seen 2019-03-26
modified 2017-10-05
published 2011-06-16
reliability Normal
reporter Rapid7
source https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/browser/ms11_050_mshtml_cobjectelement.rb
title MS11-050 IE mshtml!CObjectElement Use After Free
msbulletin via4
bulletin_id MS11-050
bulletin_url
date 2011-06-14T00:00:00
impact Remote Code Execution
knowledgebase_id 2530548
knowledgebase_url
severity Critical
title Cumulative Security Update for Internet Explorer
nessus via4
NASL family Windows : Microsoft Bulletins
NASL id SMB_NT_MS11-050.NASL
description The remote host is missing Internet Explorer (IE) Security Update 2497640. The installed version of IE is affected by several vulnerabilities that could allow an attacker to execute arbitrary code on the remote host.
last seen 2019-02-21
modified 2018-11-15
plugin id 55130
published 2011-06-15
reporter Tenable
source https://www.tenable.com/plugins/index.php?view=single&id=55130
title MS11-050: Cumulative Security Update for Internet Explorer (2530548)
oval via4
accepted 2014-08-18T04:00:24.036-04:00
class vulnerability
contributors
  • name Dragos Prisaca
    organization Symantec Corporation
  • name Dragos Prisaca
    organization Symantec Corporation
  • name Maria Mikhno
    organization ALTX-SOFT
  • name Maria Mikhno
    organization ALTX-SOFT
definition_extensions
  • comment Microsoft Windows XP (32-bit) is installed
    oval oval:org.mitre.oval:def:1353
  • comment Microsoft Windows XP x64 is installed
    oval oval:org.mitre.oval:def:15247
  • comment Microsoft Windows Server 2003 (32-bit) is installed
    oval oval:org.mitre.oval:def:1870
  • comment Microsoft Windows Server 2003 (x64) is installed
    oval oval:org.mitre.oval:def:730
  • comment Microsoft Internet Explorer 8 is installed
    oval oval:org.mitre.oval:def:6210
  • comment Microsoft Windows Vista (32-bit) is installed
    oval oval:org.mitre.oval:def:1282
  • comment Microsoft Windows Vista x64 Edition is installed
    oval oval:org.mitre.oval:def:2041
  • comment Microsoft Windows Server 2008 (32-bit) is installed
    oval oval:org.mitre.oval:def:4870
  • comment Microsoft Windows Server 2008 (64-bit) is installed
    oval oval:org.mitre.oval:def:5356
  • comment Microsoft Internet Explorer 8 is installed
    oval oval:org.mitre.oval:def:6210
  • comment Microsoft Windows 7 (32-bit) is installed
    oval oval:org.mitre.oval:def:6165
  • comment Microsoft Windows 7 x64 Edition is installed
    oval oval:org.mitre.oval:def:5950
  • comment Microsoft Windows Server 2008 R2 x64 Edition is installed
    oval oval:org.mitre.oval:def:6438
  • comment Microsoft Windows Server 2008 R2 Itanium-Based Edition is installed
    oval oval:org.mitre.oval:def:5954
  • comment Microsoft Internet Explorer 8 is installed
    oval oval:org.mitre.oval:def:6210
  • comment Microsoft Windows 7 (32-bit) is installed
    oval oval:org.mitre.oval:def:6165
  • comment Microsoft Windows 7 x64 Edition is installed
    oval oval:org.mitre.oval:def:5950
  • comment Microsoft Windows Server 2008 R2 x64 Edition is installed
    oval oval:org.mitre.oval:def:6438
  • comment Microsoft Windows Server 2008 R2 Itanium-Based Edition is installed
    oval oval:org.mitre.oval:def:5954
  • comment Microsoft Internet Explorer 8 is installed
    oval oval:org.mitre.oval:def:6210
  • comment Microsoft Windows Vista (32-bit) is installed
    oval oval:org.mitre.oval:def:1282
  • comment Microsoft Windows Vista x64 Edition is installed
    oval oval:org.mitre.oval:def:2041
  • comment Microsoft Windows Server 2008 (32-bit) is installed
    oval oval:org.mitre.oval:def:4870
  • comment Microsoft Windows Server 2008 (64-bit) is installed
    oval oval:org.mitre.oval:def:5356
  • comment Microsoft Windows 7 (32-bit) is installed
    oval oval:org.mitre.oval:def:6165
  • comment Microsoft Windows 7 x64 Edition is installed
    oval oval:org.mitre.oval:def:5950
  • comment Microsoft Windows Server 2008 R2 x64 Edition is installed
    oval oval:org.mitre.oval:def:6438
  • comment Microsoft Windows Server 2008 R2 Itanium-Based Edition is installed
    oval oval:org.mitre.oval:def:5954
  • comment Microsoft Internet Explorer 9 is installed
    oval oval:org.mitre.oval:def:11985
description Microsoft Internet Explorer 8 and 9 does not properly handle objects in memory, which allows remote attackers to execute arbitrary code by accessing an object that (1) was not properly initialized or (2) is deleted, aka "Layout Memory Corruption Vulnerability."
family windows
id oval:org.mitre.oval:def:12308
status accepted
submitted 2011-06-14T13:00:00
title Layout Memory Corruption Vulnerability
version 76
refmap via4
ms MS11-050
sreason 8275
saint via4
bid 48208
description Microsoft Internet Explorer layout-grid-char Style Property Use-After-Free Memory Corruption
id win_patch_ie_v8
osvdb 72950
title ie_layoutgridchar
type client
Last major update 21-09-2011 - 23:29
Published 16-06-2011 - 16:55
Last modified 26-02-2019 - 09:04
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