Objavljena je revizija sigurnosnog upozorenja vezanog uz programski paket Microsoft PowerPoint. Izvorno upozorenje odnosilo se na propuste koji su zlonamjernim korisnicima omogućavali pokretanje proizvoljnog programskog koda.
| Paket: | Microsoft Office 2003, Microsoft Office 2004 for Mac, Microsoft Office 2007, Microsoft Office 2008 for Mac, 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 memorijom |
| Iskorištavanje: | udaljeno |
| Posljedica: | proizvoljno izvršavanje programskog koda |
| Rješenje: | programska zakrpa proizvođača |
| CVE: | CVE-2011-1269, CVE-2011-1270 |
| Izvorni ID preporuke: | MS11-036 |
| Izvor: | Microsoft |
| Problem: | |
| Uočeni propusti posljedica su nepravilnog upravljanja memorijom kod parsiranja posebno oblikovanih .ppt dokumenata. Revizija je izdana zbog izdavanja zakrpa za Microsoft Office za Mac. |
|
| Posljedica: | |
| Udaljeni, zlonamjerni korisnici mogu iskoristiti propust za pokretanje proizvoljnog programskog koda. |
|
| Rješenje: | |
| Objavljena su rješenja koja uočen propust uklanjaju te se svim korisnicima savjetuje njihova primjena. |
|
Izvorni tekst preporuke
Microsoft Security Bulletin MS11-036 - Important
Vulnerabilities in Microsoft PowerPoint Could Allow Remote Code Execution (2545814)
Published: May 10, 2011 | Updated: June 14, 2011
Version: 1.2
General Information
Executive Summary
This security update resolves two privately reported vulnerabilities in Microsoft PowerPoint. The vulnerabilities could allow remote code execution if a user opens a specially crafted PowerPoint file. An attacker who successfully exploited either 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-2011-1269 and CVE-2011-1270. 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.
This security update is rated Important for all supported editions of Microsoft PowerPoint 2002, Microsoft PowerPoint 2003, Microsoft PowerPoint 2007, Microsoft Office 2004 for Mac, and Microsoft Office 2008 for Mac. The security update is also rated Important for all supported versions of Open XML File Format Converter for Mac 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 correcting the way that PowerPoint handles memory when parsing specially crafted PowerPoint 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 2545814 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.
Top of sectionTop of section
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 Suites 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 PowerPoint 2002 Service Pack 3
(KB2535802)
Remote Code Execution
Important
MS11-022
Microsoft Office 2003 Service Pack 3
Microsoft PowerPoint 2003 Service Pack 3
(KB2535812)
Remote Code Execution
Important
MS11-022
Microsoft Office 2007 Service Pack 2
Microsoft PowerPoint 2007 Service Pack 2
(KB2535818)
Remote Code Execution
Important
MS11-022
Microsoft Office for Mac
Microsoft Office 2004 for Mac[1]
Not applicable
Remote Code Execution
Important
None
Microsoft Office 2008 for Mac[1]
Not applicable
Remote Code Execution
Important
None
Open XML File Format Converter for Mac[1]
Not applicable
Remote Code Execution
Important
None
Other Office Software
Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Service Pack 2
(KB2540162)
Not applicable
Remote Code Execution
Important
MS11-022
[1]The security updates for Microsoft Office 2004 for Mac (KB2555786), Microsoft Office 2008 for Mac (KB2555785), and Open XML File Format Converter for Mac (KB2555787) are available as of June 14, 2011. See the entries in the section, Frequently Asked Questions (FAQ) Related to This Security Update, that explain how to obtain these updates.
Non-Affected Software
Office and Other Software
Microsoft PowerPoint 2010 (32-bit editions)
Microsoft PowerPoint 2010 (64-bit editions)
Microsoft Office for Mac 2011
Microsoft PowerPoint Viewer 2007 Service Pack 2
Microsoft PowerPoint Viewer
Microsoft Works 9
Top of sectionTop of section
Frequently Asked Questions (FAQ) Related to This Security Update
Why was this bulletin revised on June 14, 2011?
Microsoft revised this bulletin to announce that the security updates for Microsoft Office for Mac, which were not available when this bulletin was originally published, are now available in bulletin MS11-045.
Where are the security updates for Microsoft Office 2004 for Mac, Microsoft Office 2008 for Mac, and Open XML File Format Converter for Mac?
In addition to addressing vulnerabilities described in bulletin MS11-045, the security updates for Microsoft Office 2004 for Mac (KB2555786), Microsoft Office 2008 for Mac (KB2555785), and Open XML File Format Converter for Mac (KB2555787) also address a vulnerability described in this bulletin. See MS11-045 for more information and download links.
Where are the file information details?
Refer to the reference tables in the Security Update Deployment section for the location of the file information details.
How could the Office File Validation feature help to mitigate the vulnerabilities?
When the Office File Validation feature is enabled in Microsoft PowerPoint 2003 and Microsoft PowerPoint 2007, specially crafted files that could be used to exploit the vulnerabilities are not opened automatically; instead, by default, the user is prompted to choose whether or not to open such a file. A user would have to click through the warning to open the file before either of the vulnerabilities could be exploited. For more information about Office File Validation in Microsoft PowerPoint 2003 or Microsoft PowerPoint 2007, see Microsoft Security Advisory 2501584.
What is the benefit if I disable the opening of files that fail file validation in PowerPoint 2003 and PowerPoint 2007?
By setting Office File Validation to not allow the opening of suspicious files in PowerPoint 2003 and PowerPoint 2007, the Microsoft Fix it solution, "Disable the opening of documents for PowerPoint 2003 and 2007" available in Microsoft Knowledge Base Article 2501584, blocks the attack vectors for exploiting the vulnerabilities described in CVE-2011-1269 and CVE-2011-1270. Customers may choose to apply the Fix it solution as a workaround if choosing not to install the security update for PowerPoint 2003 or PowerPoint 2007 until a later time.
Refer to Microsoft Knowledge Base Article 2501584 for instructions on applying the automated Fix it solution, "Disable the opening of documents for PowerPoint 2003 and 2007," or refer to the Workaround sections for CVE-2011-1269 and CVE-2011-1270 in the Vulnerability Information section of this bulletin for instructions on applying the solution manually.
Why does this update address several reported security vulnerabilities?
This update contains support for several vulnerabilities because the modifications that are required to address these issues are located in related files. Instead of having to install several updates that are almost the same, customers need to install this update only.
What components of the Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats are updated by this bulletin?
The update included with this security bulletin applies only to the specific component within the Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats that is affected. For example, in an Excel bulletin, only the Excel compatibility pack component files are included in the update packages and not Word or PowerPoint compatibility pack component files. Word compatibility pack component files are updated in a Word bulletin and PowerPoint compatibility pack component files are updated in a PowerPoint bulletin.
How are Microsoft Office standalone programs affected by the vulnerabilities?
A Microsoft Office standalone program is affected with the same severity rating as the corresponding component in a Microsoft Office Suite. For example, a standalone installation of Microsoft PowerPoint is affected with the same severity rating as an installation of Microsoft PowerPoint that was delivered with a Microsoft Office Suite.
The Microsoft Office component discussed in this article is part of the Microsoft Office Suite that I have installed on my system; however, I did not choose to install this specific component. Will I be offered this update?
Yes, if the component discussed in this bulletin was delivered with the version of the Microsoft Office Suite installed on your system, the system will be offered updates for it whether the component is installed or not. The detection logic used to scan for affected systems is designed to check for updates for all components that were delivered with the particular Microsoft Office Suite and to offer the updates to a system. Users who choose not to apply an update for a component that is not installed, but is delivered with their version of the Microsoft Office Suite, will not increase the security risk of that system. On the other hand, users who do choose to install the update will not have a negative impact on the security or performance of a system.
Does the offer to update a non-vulnerable version of Microsoft Office constitute an issue in the Microsoft update mechanism?
No, the update mechanism is functioning correctly in that it detects a lower version of the files on the system than in the update package and thus, offers the update.
I am using an older release of the software discussed in this security bulletin. What should I do?
The affected software listed in this bulletin have been tested to determine which releases are affected. Other releases are past their support life cycle. For more information about the product lifecycle, visit the Microsoft Support Lifecycle Web site.
It should be a priority for customers who have older releases of the software to migrate to supported releases to prevent potential exposure to vulnerabilities. To determine the support lifecycle for your software release, see Select a Product for Lifecycle Information. For more information about service packs for these software releases, see Lifecycle Supported Service Packs.
Customers who require custom support for older software must contact their Microsoft account team representative, their Technical Account Manager, or the appropriate Microsoft partner representative for custom support options. Customers without an Alliance, Premier, or Authorized Contract can contact their local Microsoft sales office. For contact information, visit the Microsoft Worldwide Information Web site, select the country in the Contact Information list, and then click Go to see a list of telephone numbers. When you call, ask to speak with the local Premier Support sales manager. For more information, see the Microsoft Support Lifecycle Policy FAQ.
Top of sectionTop of section
Vulnerability Information
Severity Ratings and Vulnerability Identifiers
The following severity ratings assume the potential maximum impact of the vulnerability. For information regarding the likelihood, within 30 days of this security bulletin's release, of the exploitability of the vulnerability in relation to its severity rating and security impact, please see the Exploitability Index in the May bulletin summary. For more information, see Microsoft Exploitability Index.
Vulnerability Severity Rating and Maximum Security Impact by Affected Software
Affected Software Presentation Memory Corruption RCE Vulnerability - CVE-2011-1269 Presentation Buffer Overrun RCE Vulnerability - CVE-2011-1270 Aggregate Severity Rating
Microsoft Office Suites and Components
Microsoft PowerPoint 2002 Service Pack 3
Important
Remote Code Execution
Important
Remote Code Execution
Important
Microsoft PowerPoint 2003 Service Pack 3
Important
Remote Code Execution
Important
Remote Code Execution
Important
Microsoft PowerPoint 2007 Service Pack 2
Important
Remote Code Execution
Not applicable
Important
Microsoft Office for Mac
Microsoft Office 2004 for Mac
Important
Remote Code Execution
Not applicable
Important
Microsoft Office 2008 for Mac
Important
Remote Code Execution
Not applicable
Important
Open XML File Format Converter for Mac
Important
Remote Code Execution
Not applicable
Important
Other Office software
Microsoft Office Compatibility Pack for Word, Excel, and PowerPoint 2007 File Formats Service Pack 2
Important
Remote Code Execution
Not applicable
Important
Top of sectionTop of section
Presentation Memory Corruption RCE Vulnerability - CVE-2011-1269
A remote code execution vulnerability exists in the way that Microsoft PowerPoint handles specially crafted PowerPoint files. An attacker who successfully exploited this vulnerability could take complete control of an affected system. An attacker could then install programs; view, change, or delete data; or create new accounts with full user rights.
To view this vulnerability as a standard entry in the Common Vulnerabilities and Exposures list, see CVE-2011-1269.
Mitigating Factors for Presentation Memory Corruption RCE Vulnerability - CVE-2011-1269
Mitigation refers to a setting, common configuration, or general best-practice, existing in a default state, that could reduce the severity of exploitation of a vulnerability. The following mitigating factors may be helpful in your situation:
â 
Posljednje sigurnosne preporuke