Objavljena je nadogradnja komponente Microsoft Windows Client/Server Run-time Subsystem (CSRSS) za operacijske sustave Windows koja ispravlja višestruke sigurnosne nedostatke. Neki od njih zlonamjernim korisnicima omogućuju stjecanje dodatnih sigurnosnih ovlasti i izvršavanje proizvoljnog programskog koda.
| Paket: | Microsoft Windows 7, Microsoft Windows Server 2003, Microsoft Windows Server 2008, Microsoft Windows Vista, Microsoft Windows XP |
| Operacijski sustavi: | Microsoft Windows XP, Microsoft Windows Server 2003, Microsoft Windows Vista, Microsoft Windows Server 2008, Microsoft Windows 7 |
| Kritičnost: | 5 |
| Problem: | cjelobrojno prepisivanje, korupcija memorije, neodgovarajuća provjera ulaznih podataka, pogreška u programskoj funkciji |
| Iskorištavanje: | lokalno |
| Posljedica: | dobivanje većih privilegija, proizvoljno izvršavanje programskog koda |
| Rješenje: | programska zakrpa proizvođača |
| CVE: | CVE-2011-1281, CVE-2011-1282, CVE-2011-1283, CVE-2011-1284, CVE-2011-1870 |
| Izvorni ID preporuke: | MS11-056 |
| Izvor: | Microsoft |
| Problem: | |
| Propusti nastaju u funkcijama "AllocConsole()", "SrvSetConsoleLocalEUDC()", "SrvSetConsoleNumberOfCommand()", "SrvWriteConsoleOutput()" i "SrvWriteConsoleOutputString()". |
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| Posljedica: | |
| Lokalni, zlonamjeni korisnici mogu iskoristiti navedene nedostatke za povećanje ovlasti na ranjivom sustavu i pokretanje proizvoljnog programskog koda. |
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| Rješenje: | |
| Svim se korisnicima savjetuje primjena nadogradnje. |
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Izvorni tekst preporuke
Microsoft Security Bulletin MS11-056 - Important
Vulnerabilities in Windows Client/Server Run-time Subsystem Could Allow Elevation of Privilege (2507938)
Published: July 12, 2011
Version: 1.0
General Information
Executive Summary
This security update resolves five privately reported vulnerabilities in the Microsoft Windows Client/Server Run-time Subsystem (CSRSS). The vulnerabilities could allow elevation of privilege if an attacker logs on to a user's system and runs a specially crafted application. An attacker must have valid logon credentials and be able to log on locally to exploit the vulnerabilities.
This security update is rated Important for all supported versions of Microsoft Windows. For more information, see the subsection, Affected and Non-Affected Software, in this section.
The security update addresses the vulnerabilities by not allowing multiple console objects to be associated with one process, by modifying the way the CSRSS initializes memory, by validating user input before use as an index for an array, and by modifying bounds checking to prevent memory corruption. 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. The majority of customers have automatic updating enabled and 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 and install this update manually. For information about specific configuration options in automatic updating, see Microsoft Knowledge Base Article 294871.
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. None
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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
Operating System Maximum Security Impact Aggregate Severity Rating Bulletins Replaced by this Update
Windows XP Service Pack 3
Elevation of Privilege
Important
MS11-010,
MS10-069
Windows XP Professional x64 Edition Service Pack 2
Elevation of Privilege
Important
MS11-010,
MS10-069
Windows Server 2003 Service Pack 2
Elevation of Privilege
Important
MS11-010,
MS10-069
Windows Server 2003 x64 Edition Service Pack 2
Elevation of Privilege
Important
MS11-010,
MS10-069
Windows Server 2003 with SP2 for Itanium-based Systems
Elevation of Privilege
Important
MS11-010,
MS10-069
Windows Vista Service Pack 1 and Windows Vista Service Pack 2
Elevation of Privilege
Important
None
Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2
Elevation of Privilege
Important
None
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2*
Elevation of Privilege
Important
None
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2*
Elevation of Privilege
Important
None
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2
Elevation of Privilege
Important
None
Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1
Elevation of Privilege
Important
None
Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1
Elevation of Privilege
Important
None
Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1*
Elevation of Privilege
Important
None
Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2 for Itanium-based Systems Service Pack 1
Elevation of Privilege
Important
None
*Server Core installation affected. This update applies, with the same severity rating, to supported editions of Windows Server 2008 or Windows Server 2008 R2 as indicated, whether or not installed using the Server Core installation option. For more information on this installation option, see the TechNet articles, Managing a Server Core Installation and Servicing a Server Core Installation. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008 and Windows Server 2008 R2; see Compare Server Core Installation Options.
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Frequently Asked Questions (FAQ) Related to This Security Update
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.
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.
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.
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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 July bulletin summary. For more information, see Microsoft Exploitability Index.
Vulnerability Severity Rating and Maximum Security Impact by Affected Software
Affected Software CSRSS Local EOP AllocConsole Vulnerability - CVE-2011-1281 CSRSS Local EOP SrvSetConsoleLocalEUDC Vulnerability - CVE-2011-1282 CSRSS Local EOP SrvSetConsoleNumberOfCommand Vulnerability - CVE-2011-1283 CSRSS Local EOP SrvWriteConsoleOutput Vulnerability - CVE-2011-1284 CSRSS Local EOP SrvWriteConsoleOutputString Vulnerability - CVE-2011-1870 Aggregate Severity Rating
Windows XP Service Pack 3
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Windows XP Professional x64 Edition Service Pack 2
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Windows Server 2003 Service Pack 2
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Windows Server 2003 x64 Edition Service Pack 2
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Windows Server 2003 with SP2 for Itanium-based Systems
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Elevation of Privilege
Important
Windows Vista Service Pack 1 and Windows Vista Service Pack 2
Important
Elevation of Privilege
Low
Denial of Service
Important
Elevation of Privilege
Important
Elevation of Privilege
Not applicable
Important
Windows Vista x64 Edition Service Pack 1 and Windows Vista x64 Edition Service Pack 2
Important
Elevation of Privilege
Low
Denial of Service
Important
Elevation of Privilege
Important
Elevation of Privilege
Not applicable
Important
Windows Server 2008 for 32-bit Systems and Windows Server 2008 for 32-bit Systems Service Pack 2*
Important
Elevation of Privilege
Low
Denial of Service
Important
Elevation of Privilege
Important
Elevation of Privilege
Not applicable
Important
Windows Server 2008 for x64-based Systems and Windows Server 2008 for x64-based Systems Service Pack 2*
Important
Elevation of Privilege
Low
Denial of Service
Important
Elevation of Privilege
Important
Elevation of Privilege
Not applicable
Important
Windows Server 2008 for Itanium-based Systems and Windows Server 2008 for Itanium-based Systems Service Pack 2
Important
Elevation of Privilege
Low
Denial of Service
Important
Elevation of Privilege
Important
Elevation of Privilege
Not applicable
Important
Windows 7 for 32-bit Systems and Windows 7 for 32-bit Systems Service Pack 1
Important
Elevation of Privilege
Low
Denial of Service
Not applicable
Important
Elevation of Privilege
Not applicable
Important
Windows 7 for x64-based Systems and Windows 7 for x64-based Systems Service Pack 1
Important
Elevation of Privilege
Low
Denial of Service
Not applicable
Important
Elevation of Privilege
Not applicable
Important
Windows Server 2008 R2 for x64-based Systems and Windows Server 2008 R2 for x64-based Systems Service Pack 1*
Important
Elevation of Privilege
Low
Denial of Service
Not applicable
Important
Elevation of Privilege
Not applicable
Important
Windows Server 2008 R2 for Itanium-based Systems and Windows Server 2008 R2 for Itanium-based Systems Service Pack 1
Important
Elevation of Privilege
Low
Denial of Service
Not applicable
Important
Elevation of Privilege
Not applicable
Important
*Server Core installation affected. This update applies, with the same severity rating, to supported editions of Windows Server 2008 or Windows Server 2008 R2 as indicated, whether or not installed using the Server Core installation option. For more information on this installation option, see the TechNet articles, Managing a Server Core Installation and Servicing a Server Core Installation. Note that the Server Core installation option does not apply to certain editions of Windows Server 2008 and Windows Server 2008 R2; see Compare Server Core Installation Options.
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CSRSS Local EOP AllocConsole Vulnerability - CVE-2011-1281
An elevation of privilege vulnerability exists in Windows CSRSS due to the way that the CSRSS subsystem assigns memory for specific user transactions. An attacker who successfully exploited this vulnerability could run arbitrary code in kernel mode. 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-2011-1281.
Mitigating Factors for CSRSS Local EOP AllocConsole Vulnerability - CVE-2011-1281
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:
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