IntelliShield has updated this alert to report an increase in intrusion prevention system activity that is related to the Microsoft SharePoint Server wizardlist.aspx cross-site scripting vulnerability.
Microsoft SharePoint contains a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site scripting vulnerabilities.
The vulnerability is due to improper validation of user-supplied input.†† An unauthenticated, remote attacker could exploit the vulnerability by convincing a user to visit a malicious site.† If successful, the attacker could execute arbitrary script or HTML content in the user's browser.
Microsoft confirmed the vulnerability in a security bulletin and released software updates.
The following Microsoft products are affected:
Microsoft Office SharePoint Server 2010 SP1 and prior
Microsoft SharePoint Foundation 2010 SP1 and prior
To exploit the vulnerability, the attacker may provide a link that directs a user to a malicious site and use misleading language or instructions to persuade the user to follow the provided link.
Event data from Cisco Remote Management Services has detected intrusion prevention system signature activity related to this vulnerability.† The data, which was captured on March 19, 2012, could indicate that exploits have occurred in the wild.
Microsoft has released a security bulletin at the following link: MS12-011†
An unauthenticated, remote attacker could exploit this vulnerability to access sensitive browser-based information, possibly including user authentication credentials.
The vulnerability is due to improper validation of user-supplied input by the wizardlist.aspx script of SharePoint.
An unauthenticated, remote attacker could exploit this vulnerability by convincing a user to follow a malicious URL that is designed to submit malicious input to the vulnerable script.† The script may return that input to the user's browser without proper sanitization and rendered the input in the security context of the affected site.† The attacker could include arbitrary script or HTML code that could allow the attacker to access sensitive browser-based information.
Administrators are advised to apply the appropriate updates.
Users are advised not to open e-mail messages from suspicious or unrecognized sources. If users cannot verify that links or attachments included in e-mail messages are safe, they are advised not to open them.
Administrators may consider using the Microsoft Baseline Security Analyzer (MBSA) scan tool to identify common security misconfigurations and missing security updates on system endpoints.
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 Windows Update website. Microsoft Windows Server Update Services (WSUS), Systems Management Server, and System Center Configuration Manager can assist administrators in deploying software updates.
Version 3, February 23, 2012, 1:36 PM: IntelliShield has updated this alert to report an increase in intrusion prevention system activity that is related to the Microsoft SharePoint Server wizardlist.aspx cross-site scripting vulnerability.
Version 2, February 21, 2012, 9:24 AM: IntelliShield has updated this alert to report an increase in intrusion prevention system activity that is related to the Microsoft SharePoint Server wizardlist.aspx cross-site scripting vulnerability.
Version 1, February 14, 2012, 1:24 PM: Microsoft SharePoint contains a vulnerability that could allow an unauthenticated, remote attacker to conduct cross-site scripting attacks.† Updates are available.
The security vulnerability applies to the following combinations of products.
Office SharePoint Server
2010 Base, SP1
2010 Base, SP1
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