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Microsoft SharePoint XSS scriptresx.ashx Elevation of Privilege (MS12-050; CVE-2012-1859)

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Check Point Reference: CPAI-2012-306
Date Published:
Severity:
Source: Microsoft Security Bulletin MS12-050
Industry Reference(s): CVE-2012-1859
Protection Provided by: Security Gateway
  • R75
  • R71
  • R70
IPS-1
  • IPS-1
  • IPS-1 NGX R65
Who is Vulnerable?
Microsoft SharePoint Server
Windows SharePoint Services and Microsoft SharePoint Foundation
Vulnerability Description
An information disclosure and elevation of privilege vulnerability has been reported in Microsoft SharePoint.
Update/Patch Available
Apply patches from: MS12-050
Vulnerability Details
The vulnerability is due to an error in the way Microsoft SharePoint handles specially crafted URLs containing malicious JavaScript elements. A remote attacker may exploit this issue by enticing a target user to open a specially crafted web page. Successful exploitation of this vulnerability will allow an attacker to read content which was not intended to be disclosed. An attacker may also be able to issue SharePoint commands in the context of an authenticated user.

Protection Overview
This protection will detect and block attempts to exploit this vulnerability.

In order for the protection to be activated, update your Security Gateway product to the latest IPS update. For information on how to update IPS, go to SBP-2006-05, Protection tab and select the version of your choice.

To configure the defense, select your product from the list below and follow the related protection steps.

Security Gateway R75 / R71 / R70

How Can I Protect My Network?

  1. In the IPS tab, click Protections and find the Microsoft SharePoint XSS scriptresx.ashx Elevation of Privilege (MS12-050) protection using the Search tool and Edit the protection's settings.
  2. Install policy on all modules.

How Do I Know if My Network is Under Attack?
SmartView Tracker will log the following entries:
Attack Name: Web Client Enforcement Violation
Attack Information: Microsoft SharePoint XSS scriptresx.ashx Elevation of Privilege (MS12-050)

IPS-1 NGX R65 & IPS-1

How Can I Protect My Network?

  1. In the IPS-1 Policy Manager, click on the Protection tab.
  2. In the Protection tree, click Application Intelligence > WWW2 , and select the XSS Attacks protection group.
  3. Click "Microsoft SharePoint XSS scriptresx.ashx Elevation of Privilege (MS12-050)".
  4. In the configuration pane, under Settings, check Active.
  5. Click on Install Policy.

How Do I Know if My Network is Under Attack?
Upon attack, the following entries will be logged:

Alert Name: XSS Attacks.
Description: "Microsoft SharePoint XSS scriptresx.ashx Elevation of Privilege (MS12-050)".