Zabilježena su dva sigurnosna propusta vezana uz Microsoft Host Integration Server. Navedeni propusti udaljenom napadaču omogućuju DoS (eng. Denial of Service) napad.

Microsoft Security Bulletin MS11-082 - Important
Vulnerabilities in Host Integration Server Could Allow Denial of Service (2607670)

Published: Tuesday, October 11, 2011

Version: 1.0
General Information
Executive Summary

This security update resolves two publicly disclosed vulnerabilities in Host Integration Server. The vulnerabilities could allow denial of service if a remote attacker sends specially crafted network packets to a Host Integration Server listening on UDP port 1478 or TCP ports 1477 and 1478. Firewall best practices and standard default firewall configurations can help protect networks from attacks that originate outside the enterprise perimeter. Best practices recommend that systems that are connected to the Internet have a minimal number of ports exposed. In this case, the Host Integration Server ports should be blocked from the Internet.

This security update is rated Important for all supported editions of Microsoft Host Integration Server 2004, Microsoft Host Integration Server 2006, Microsoft Host Integration Server 2009, and Microsoft Host Integration Server 2010. For more information, see the subsection, Affected and Non-Affected Software, in this section.

The security update addresses the vulnerabilities by modifying the way that Host Integration Server handles specially crafted UDP and TCP packets. 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
Microsoft Host Integration Server 2004 Service Pack 1
(KB2578757)	Denial of Service	Important	None
Microsoft Host Integration Server 2006 Service Pack 1
(KB2579597)	Denial of Service	Important	None
Microsoft Host Integration Server 2009
(KB2579598)	Denial of Service	Important	None
Microsoft Host Integration Server 2010
(KB2579599)	Denial of Service	Important	None

Non-Affected Software
Operating System
Microsoft Host Integration Server 2000 Service Pack 2
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Frequently Asked Questions (FAQ) Related to This Security Update
Vulnerability Information
Severity Ratings and Vulnerability Identifiers
Endless Loop DoS in snabase.exe Vulnerability - CVE-2011-2007
Access of Unallocated Memory DoS Vulnerability - CVE-2011-2008
Update Information
Detection and Deployment Tools and Guidance
Security Update Deployment
Other Information
Microsoft Active Protections Program (MAPP)
To improve security protections for customers, Microsoft provides vulnerability information to major security software providers in advance of each monthly security update release. Security software providers can then use this vulnerability information to provide updated protections to customers via their security software or devices, such as antivirus, network-based intrusion detection systems, or host-based intrusion prevention systems. To determine whether active protections are available from security software providers, please visit the active protections Web sites provided by program partners, listed in Microsoft Active Protections Program (MAPP) Partners.
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Support

    Customers in the U.S. and Canada can receive technical support from Security Support or 1-866-PCSAFETY. There is no charge for support calls that are associated with security updates. For more information about available support options, see Microsoft Help and Support.
    International customers can receive support from their local Microsoft subsidiaries. There is no charge for support that is associated with security updates. For more information about how to contact Microsoft for support issues, visit the International Support Web site.

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Disclaimer

The information provided in the Microsoft Knowledge Base is provided "as is" without warranty of any kind. Microsoft disclaims all warranties, either express or implied, including the warranties of merchantability and fitness for a particular purpose. In no event shall Microsoft Corporation or its suppliers be liable for any damages whatsoever including direct, indirect, incidental, consequential, loss of business profits or special damages, even if Microsoft Corporation or its suppliers have been advised of the possibility of such damages. Some states do not allow the exclusion or limitation of liability for consequential or incidental damages so the foregoing limitation may not apply.
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Revisions

    V1.0 (October 11, 2011): Bulletin published.