ID CVE-2011-0105
Summary Microsoft Excel 2002 SP3, Office 2004 and 2008 for Mac, and Open XML File Format Converter for Mac obtain a certain length value from an uninitialized memory location, which allows remote attackers to trigger a buffer overflow and execute arbitrary code via a crafted Excel file, aka "Excel Data Initialization Vulnerability."
References
Vulnerable Configurations
  • Microsoft Office Excel 2002 Service Pack 3
    cpe:2.3:a:microsoft:excel:2002:sp3
  • Microsoft Office 2004 Mac
    cpe:2.3:a:microsoft:office:2004:-:mac
  • Microsoft Office 2008 Mac
    cpe:2.3:a:microsoft:office:2008:-:mac
  • cpe:2.3:a:microsoft:open_xml_file_format_converter:-:mac
    cpe:2.3:a:microsoft:open_xml_file_format_converter:-:mac
CVSS
Base: 9.3 (as of 14-04-2011 - 09:23)
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 MS11-021 Microsoft Office 2007 Excel .xlb Buffer Overflow. CVE-2011-0105. Local exploit for windows platform
id EDB-ID:18087
last seen 2016-02-02
modified 2011-11-05
published 2011-11-05
reporter metasploit
source https://www.exploit-db.com/download/18087/
title Microsoft Office 2007 Excel .xlb Buffer Overflow MS11-021
metasploit via4
description This module exploits a vulnerability found in Excel of Microsoft Office 2007. By supplying a malformed .xlb file, an attacker can control the content (source) of a memcpy routine, and the number of bytes to copy, therefore causing a stack- based buffer overflow. This results in arbitrary code execution under the context of the user.
id MSF:EXPLOIT/WINDOWS/FILEFORMAT/MS11_021_XLB_BOF
last seen 2019-02-15
modified 2017-09-22
published 2011-11-05
reliability Normal
reporter Rapid7
source https://github.com/rapid7/metasploit-framework/blob/master/modules/exploits/windows/fileformat/ms11_021_xlb_bof.rb
title MS11-021 Microsoft Office 2007 Excel .xlb Buffer Overflow
msbulletin via4
bulletin_id MS11-021
bulletin_url
date 2011-04-12T00:00:00
impact Remote Code Execution
knowledgebase_id 2489283
knowledgebase_url
severity Important
title Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution
nessus via4
  • NASL family MacOS X Local Security Checks
    NASL id MACOSX_MS_OFFICE_APR2011.NASL
    description The remote Mac OS X host is running a version of Microsoft Office that is affected by several vulnerabilities. If an attacker can trick a user on the affected host into opening a specially crafted Office file, these issues could be leveraged to execute arbitrary code subject to the user's privileges.
    last seen 2019-02-21
    modified 2018-07-14
    plugin id 53374
    published 2011-04-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=53374
    title MS11-021 / MS11-022 / MS11-023: Vulnerabilities in Microsoft Office Could Allow Remote Code Execution (2489279 / 2489283 / 2489293) (Mac OS X)
  • NASL family Windows : Microsoft Bulletins
    NASL id SMB_NT_MS11-021.NASL
    description The remote Windows host is running a version of Microsoft Excel or Excel Viewer that is affected by several vulnerabilities. If an attacker can trick a user on the affected host into opening a specially crafted Excel file, they could leverage this issue to execute arbitrary code subject to the user's privileges.
    last seen 2019-02-21
    modified 2018-11-15
    plugin id 53378
    published 2011-04-13
    reporter Tenable
    source https://www.tenable.com/plugins/index.php?view=single&id=53378
    title MS11-021: Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (2489279)
oval via4
accepted 2012-05-28T04:00:26.137-04:00
class vulnerability
contributors
  • name Dragos Prisaca
    organization Symantec Corporation
  • name Shane Shaffer
    organization G2, Inc.
definition_extensions
comment Microsoft Excel 2002 is installed
oval oval:org.mitre.oval:def:473
description Microsoft Excel 2002 SP3, Office 2004 and 2008 for Mac, and Open XML File Format Converter for Mac obtain a certain length value from an uninitialized memory location, which allows remote attackers to trigger a buffer overflow and execute arbitrary code via a crafted Excel file, aka "Excel Data Initialization Vulnerability."
family windows
id oval:org.mitre.oval:def:12618
status accepted
submitted 2011-04-12T13:00:00
title Excel Data Initialization Vulnerability
version 7
packetstorm via4
data source https://packetstormsecurity.com/files/download/106665/ms11_021_xlb_bof.rb.txt
id PACKETSTORM:106665
last seen 2016-12-05
published 2011-11-06
reporter Abysssec
source https://packetstormsecurity.com/files/106665/MS11-021-Microsoft-Office-2007-Excel-.xlb-Buffer-Overflow.html
title MS11-021 Microsoft Office 2007 Excel .xlb Buffer Overflow
refmap via4
cert TA11-102A
ms MS11-021
sectrack 1025337
secunia 39122
vupen ADV-2011-0940
saint via4
bid 47256
description Microsoft Excel Data Validation Record Parsing Overflow
id win_patch_excelxp
osvdb 71765
title excel_data_validation_record_parsing
type client
Last major update 04-10-2011 - 00:00
Published 13-04-2011 - 14:55
Last modified 12-10-2018 - 17:59
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