Vulnerability Note VU#950516

Microsoft COM+ contains a memory management flaw

Original Release date: 11 Oct 2005 | Last revised: 15 Dec 2005


Microsoft COM+ contains a vulnerability due to a memory management flaw that may allow an attacker to take complete control of an affected system.


Microsoft gives the following definition of COM+:

    COM+ is the next step in the evolution of the Microsoft Component Object Model and Microsoft Transaction Server (MTS). COM+ handles resource management tasks, such as thread allocation and security. It automatically makes applications more scalable by providing thread pooling, object pooling, and just-in-time object activation. COM+ also helps protect the integrity of data by providing transaction support even if a transaction spans multiple databases over a network. For information about COM+, visit the following Microsoft Web site.

Microsoft COM+ contains a flaw in the process used to create and utilize memory that may allow an attacker to take complete control of a system. The attacker may be able to execute arbitrary code on the system and take control of it by sending a specially-crafted network packet to the system.

Note that Windows 2000 and Windows XP SP1 systems are primarily at risk. Windows XP SP2 and Windows Server 2003 (including SP1) are only vulnerable to a local, authenticated attacker exploiting this flaw. This vulnerability is being actively exploited.


A remote, unauthenticated attacker may be able to execute arbitrary code and take complete control of an affected system.


Apply an update
Please see Microsoft Security Bulletin MS05-051 for more information.

Systems Affected (Learn More)

VendorStatusDate NotifiedDate Updated
Microsoft CorporationAffected-11 Oct 2005
If you are a vendor and your product is affected, let us know.

CVSS Metrics (Learn More)

Group Score Vector
Base N/A N/A
Temporal N/A N/A
Environmental N/A N/A



Microsoft reported this vulnerability, and in turn thank Cesar Cerrudo of Argeniss for information on the issue.

This document was written by Ken MacInnis.

Other Information

  • CVE IDs: CVE-2005-1978
  • Date Public: 11 Oct 2005
  • Date First Published: 11 Oct 2005
  • Date Last Updated: 15 Dec 2005
  • Severity Metric: 28.10
  • Document Revision: 12


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