Microsoft Exchange Server contains a vulnerability that could allow an authenticated, remote attacker to cause a denial of service condition. Updates are available.
Microsoft Exchange Server contains a vulnerability that could allow an authenticated, remote attacker to cause a denial of service (DoS) condition.
The vulnerability is due to improper processing of RSS feeds. An authenticated, remote attacker could exploit the vulnerability by creating a malicious RSS feed on the Exchange Server. If successful, the attacker could cause Exchange services to become unresponsive, resulting in a DoS condition.
Microsoft confirmed the vulnerability in a security bulletin and released software updates.
Microsoft Exchange Server 2007 SP3 and prior and Microsoft Exchange Server 2010 SP2 and prior are vulnerable.
Only current users of a vulnerable system with valid user credentials could exploit the vulnerability, decreasing the likelihood of exploitation.
Microsoft has released a security bulletin at the following link: MS12-080
An authenticated, remote attacker could exploit the vulnerability to cause Exchange services to become unavailable, rendering mailboxes unavailable to legitimate users and resulting in a DoS condition.
The vulnerability is due to improper processing of RSS feeds.
An authenticated, remote attacker with a valid Exchange account could exploit the vulnerability by creating a malicious RSS feed in the affected application. When processed, the RSS feed could cause Exchange services to become unresponsive, resulting in a DoS condition.
Administrators are advised to apply the appropriate updates.
Administrators are advised to allow only trusted users to have application access.
Administrators are advised to monitor affected systems.
Microsoft customers can obtain updates directly by using the links in the security bulletin. These updates are also distributed by Windows automatic update features and available on the Microsoft Update service. Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.
The security vulnerability applies to the following combinations of products.
2010Base, SP1, SP2 | 2007Base, SP1, SP2, SP3
Alerts and bulletins on the Cisco Security Intelligence Operations Portal are highlighted by analysts in the
Cisco Threat Operations Center and represent a subset of the comprehensive content that is available through Cisco Security IntelliShield Alert Manager Service.
This customizable threat and vulnerability alert service provides security staff with access to timely, accurate, and credible information about threats and vulnerabilities that may affect their environment.
The urgency and severity ratings of this alert are not tailored to individual users; users may value alerts differently based upon their network configurations and circumstances. THE ALERT, AND INFORMATION CONTAINED THEREIN, ARE PROVIDED ON AN "AS IS" BASIS AND DO NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE ALERT, AND INFORMATION CONTAINED THEREIN, OR MATERIALS LINKED FROM THE ALERT, IS AT YOUR OWN RISK. INFORMATION IN THIS ALERT AND ANY RELATED COMMUNICATIONS IS BASED ON OUR KNOWLEDGE AT THE TIME OF PUBLICATION AND IS SUBJECT TO CHANGE WITHOUT NOTICE. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE ALERTS AT ANY TIME.