U programskom alatu Microsoft Excel uočene su višestruke ranjivosti koje udaljenim napadačima omogućuju pokretanje proizvoljnog, programskog koda.Radi se o reviziji prethodnog objavljenog sigurnosnog upozorenja s oznakom MS11-045.
Paket: |
Microsoft Excel 2002, Microsoft Excel 2003, Microsoft Excel 2007, Microsoft Excel 2010, Microsoft Office 2003, Microsoft Office 2004 for Mac, Microsoft Office 2007, Microsoft Office 2008 for Mac, Microsoft Office 2010, Microsoft Office XP, Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats |
Operacijski sustavi: |
Microsoft Windows XP, Microsoft Windows Server 2003, Microsoft Windows Vista, Microsoft Windows Server 2008, Microsoft Windows 7 |
Kritičnost: |
6.9 |
Problem: |
neodgovarajuće rukovanje datotekama |
Iskorištavanje: |
udaljeno |
Posljedica: |
proizvoljno izvršavanje programskog koda |
Rješenje: |
programska zakrpa proizvođača |
CVE: |
CVE-2011-1272, CVE-2011-1273, CVE-2011-1279, CVE-2011-1274, CVE-2011-1275, CVE-2011-1276, CVE-2011-1277, CVE-2011-1278 |
Izvorni ID preporuke: |
MS11-045 |
Izvor: |
Microsoft |
|
Problem: |
Svi problemi posljedica su neodgovarajuće obrade zapisa u posebno oblikovanim Excel datotekama. Revizija je objavljena zbog informativnih promjena u tekstu izvorne preporuke.
|
Posljedica: |
Udaljeni napadač sve propuste može iskoristiti za izvršavanje proizvoljnog programskog koda putem posebno oblikovane Excel datoteke.
|
Rješenje: |
Svim korisnicima savjetuje se primjena nadogradnje.
|
Izvorni tekst preporuke
Microsoft Security Bulletin MS11-045 - Important
Vulnerabilities in Microsoft Excel Could Allow Remote Code Execution (2537146)
Published: June 14, 2011 | Updated: August 10, 2011
Version: 1.1
General Information
Executive Summary
This security update resolves eight privately reported vulnerabilities in Microsoft Office. The vulnerabilities could allow remote code execution if a user opens a specially crafted Excel file. An attacker who successfully exploited any of these vulnerabilities could gain the same user rights as the logged-on user. Users whose accounts are configured to have fewer user rights on the system could be less impacted than users who operate with administrative user rights. Installing and configuring Office File Validation (OFV) to prevent the opening of suspicious files blocks the attack vectors for exploiting the vulnerabilities described in CVE-2011-1272, CVE-2011-1273, and CVE-2011-1279. See the section, Frequently Asked Questions (FAQ) Related to This Security Update, for more information about how the Office File Validation feature can be configured to block the attack vectors. Microsoft Excel 2010 is only affected by CVE-2011-1273 described in this bulletin. The automated Microsoft Fix it solution, "Disable Edit in Protected View for Excel 2010," available in Microsoft Knowledge Base Article 2501584, blocks the attack vectors for exploiting CVE-2011-1273.
This security update is rated Important for all supported editions of Microsoft Excel 2002, Microsoft Excel 2003, Microsoft Excel 2007, Microsoft Excel 2010, Microsoft Office 2004 for Mac, Microsoft Office 2008 for Mac, and Microsoft Office for Mac 2011; Open XML File Format Converter for Mac; and all supported versions of Microsoft Excel Viewer and Microsoft Office Compatibility Pack. For more information, see the subsection, Affected and Non-Affected Software, in this section.
The update addresses the vulnerabilities by modifying the way that Microsoft Excel validates record information when parsing specially crafted Excel files. For more information about the vulnerabilities, see the Frequently Asked Questions (FAQ) subsection for the specific vulnerability entry under the next section, Vulnerability Information.
Recommendation. Customers can configure automatic updating to check online for updates from Microsoft Update by using the Microsoft Update service. Customers who have automatic updating enabled and configured to check online for updates from Microsoft Update typically will not need to take any action because this security update will be downloaded and installed automatically. Customers who have not enabled automatic updating need to check for updates from Microsoft Update and install this update manually. For information about specific configuration options in automatic updating in supported editions of Windows XP and Windows Server 2003, see Microsoft Knowledge Base Article 294871. For information about automatic updating in supported editions of Windows Vista, Windows Server 2008, Windows 7, and Windows Server 2008 R2, see Understanding Windows automatic updating.
For administrators and enterprise installations, or end users who want to install this security update manually, Microsoft recommends that customers apply the update at the earliest opportunity using update management software, or by checking for updates using the Microsoft Update service.
See also the section, Detection and Deployment Tools and Guidance, later in this bulletin.
Known Issues. Microsoft Knowledge Base Article 2537146 documents the currently known issues that customers may experience when installing this security update. The article also documents recommended solutions for these issues. When currently known issues and recommended solutions pertain only to specific releases of this software, this article provides links to further articles.
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Affected and Non-Affected Software
The following software have been tested to determine which versions or editions are affected. Other versions or editions are either past their support life cycle or are not affected. To determine the support life cycle for your software version or edition, visit Microsoft Support Lifecycle.
Affected Software
Microsoft Office Suite and Other Software Component Maximum Security Impact Aggregate Severity Rating Bulletins Replaced by this Update
Microsoft Office Suites and Components
Microsoft Office XP Service Pack 3
Microsoft Excel 2002 Service Pack 3
(KB2541003)
Remote Code Execution
Important
MS11-021
Microsoft Office 2003 Service Pack 3
Microsoft Excel 2003 Service Pack 3
(KB2541025)
Remote Code Execution
Important
MS11-021
Microsoft Office 2007 Service Pack 2
Microsoft Excel 2007 Service Pack 2[1]
(KB2541007)
Remote Code Execution
Important
MS11-021
Microsoft Office 2010 (32-bit editions)
Microsoft Excel 2010 (32-bit editions)
(KB2523021)
Remote Code Execution
Important
MS11-021
Microsoft Office 2010 (64-bit editions)
Microsoft Excel 2010 (64-bit editions)
(KB2523021)
Remote Code Execution
Important
MS11-021
Microsoft Office for Mac
Microsoft Office 2004 for Mac
(KB2555786)
Not applicable
Remote Code Execution
Important
MS11-021,
MS11-022
Microsoft Office 2008 for Mac
(KB2555785)
Not applicable
Remote Code Execution
Important
MS11-021,
MS11-022
Microsoft Office for Mac 2011
(KB2555784)
Not applicable
Remote Code Execution
Important
MS11-021,
MS11-022
Open XML File Format Converter for Mac
(KB2555787)
Not applicable
Remote Code Execution
Important
MS11-021
Other Microsoft Office Software
Microsoft Excel Viewer Service Pack 2
(KB2541015)
Not applicable
Remote Code Execution
Important
MS11-021
Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Service Pack 2
(KB2541012)
Not applicable
Remote Code Execution
Important
MS11-021
[1]For Microsoft Office Excel 2007 Service Pack 2, in addition to security update package KB2541007, customers also need to install the security update for Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Service Pack 2 (KB2541012) to be protected from the vulnerabilities described in this bulletin.
Non-Affected Software
Office and Other Software
Microsoft Works 9
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Frequently Asked Questions (FAQ) Related to This Security Update
Vulnerability Information
Severity Ratings and Vulnerability Identifiers
Excel Insufficient Record Validation Vulnerability - CVE-2011-1272
Excel Improper Record Parsing Vulnerability - CVE-2011-1273
Excel Out of Bounds Array Access Vulnerability - CVE-2011-1274
Excel Memory Heap Overwrite Vulnerability - CVE-2011-1275
Excel Buffer Overrun Vulnerability - CVE-2011-1276
Excel Memory Corruption Vulnerability - CVE-2011-1277
Excel WriteAV Vulnerability- CVE-2011-1278
Excel Out of Bounds WriteAV Vulnerability - CVE-2011-1279
Update Information
Detection and Deployment Tools and Guidance
Security Update Deployment
Other Information
Acknowledgments
Microsoft thanks the following for working with us to help protect customers:
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