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Panda Protection

Virus Encyclopedia

Welcome to the Virus Encyclopedia of Panda Security.

MS05-021

Threat LevelModerate threatDamageHighDistributionNot widespread
Common name:MS05-021
Technical name:MS05-021
Threat level:Low
Alias:Vulnerability in Exchange Server, Vulnerabilidad en Exchange Server
Type:Vulnerability
Effects:  

It is a vulnerability in Exchange Server 2003 and 2000, which allows hackers to gain remote control of the affected computer with the same privileges as the logged on user.

Affected platforms:

Windows 2003/2000

First detected on:April 13, 2005
Detection updated on:April 14, 2005
StatisticsNo

Brief Description 

    

MS05-021 is not categorized as virus, worm, Trojan or backdoor. It is a critical vulnerability in Exchange Server 2003 and 2000, which allows arbitrary code to be remotely executed in the vulnerable computer.

If exploited successfully, MS05-021 allows hackers to gain remote control of the affected computer with the same privileges as the logged on user. If this user had administrator rights, the hacker could take complete control of the system: create, modify or delete files, install programs, create new user accounts, etc.

In Exchange Server 2003, the hacker would have to authenticate as an account in an Exchange organization in order to exploit this vulnerability. In Exchange Server 2000, the attacker does not need to be authenticated, and could exploit this vulnerability by connecting to an SMTP port on the server and issuing a specially crafted command.

 

If you have a computer running Exchange Server 2003 or 2000, it is recommendable to download and apply the security patch for this vulnerability. Click here to access the web page for downloading the patch.