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Check Point Advisories

Preemptive Protection against Microsoft SharePoint HTML Sanitization Cross-site Scripting (MS12-050; CVE-2012-1858)

Check Point Reference: CPAI-2012-309
Date Published: 10 Jul 2012
Severity: High
Last Updated:
Source: CVE-2012-1858
Protection Provided by:

Security Gateway

  • R71
  • R75

  • Who is Vulnerable? Microsoft Office Client Software
    Microsoft SharePoint Server
    Microsoft Groove Server
    Windows SharePoint Services and Microsoft SharePoint Foundation
    Vulnerability Description A cross-site scripting vulnerability has been reported in Microsoft SharePoint.
    Update/Patch AvaliableApply patches from: MS12-050
    Vulnerability DetailsThe vulnerability is due to an error in the way HTML strings are sanitized. A remote attacker can exploit this vulnerability by submitting a specially crafted script to a target site that use HTML sanitization. Successful exploitation could allow an attacker to perform cross-site scripting attacks against affected users, resulting in script execution in the target's security context.

    Protection Overview

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

    No update is required to address this vulnerability

    Users are protected against this vulnerability if the Internet Explorer HTML Sanitization Information Disclosure (MS12-039) protection found in the Protection section of CPAI-2012-255 has been applied.

    Security Gateway R75 / R71 / R70

    1. In the IPS tab, click Protections and find the Internet Explorer HTML Sanitization Information Disclosure (MS12-039) protection using the Search tool and Edit the protection's settings.
    2. Install policy on all modules.

    SmartView Tracker will log the following entries:
    Attack Name: Web Client Enforcement Violation
    Attack Information: Internet Explorer HTML Sanitization Information Disclosure (MS12-039)