Check Point Reference:CPAI-2012-020
Date Published: 10 Jan 2012
Severity: High
Last Updated:
Source: CVE-2011-3389
Protection Provided by:

Security Gateway
R70

  • R71
  • R75

  • Who is Vulnerable? Windows XP Service Pack 3
    Windows XP Professional x64 Edition Service Pack 2
    Windows Server 2003 Service Pack 2
    Windows Server 2003 x64 Edition Service Pack 2
    Windows Server 2003 with SP2 for Itanium-based Systems
    Windows Vista Service Pack 2
    Windows Vista x64 Edition Service Pack 2
    Windows Server 2008 for 32-bit Systems Service Pack 2
    Windows Server 2008 for x64-based Systems Service Pack 2
    Windows Server 2008 for Itanium-based Systems Service Pack 2
    Windows 7 for 32-bit Systems
    Windows 7 for 32-bit Systems Service Pack 1
    Windows 7 for x64-based Systems
    Windows 7 for x64-based Systems Service Pack 1
    Windows Server 2008 R2 for x64-based Systems
    Windows Server 2008 R2 for x64-based Systems Service Pack 1
    Windows Server 2008 R2 for Itanium-based Systems
    Windows Server 2008 R2 for Itanium-based Systems Service Pack 1
    Vulnerability Description An information disclosure vulnerability has been reported in SSL 3.0 and TLS 1.0 encryption protocols.
    Vulnerability DetailsThe vulnerability is caused due to a design flaw in the SSL and TLS protocols when Cipher-block chaining (CBC) mode of operation is used. The vulnerability affects the protocol itself and is not specific to the Windows operating system. Remote attackers may exploit this issue by rapidly sending a large number of SSL and TLS requests to the server. Successful exploitation could allow an attacker to decrypt portions of encrypted web traffic, resulting in the disclosure of sensitive information.

    Protection Overview

    IPS will detect and block SSL and TLS requests sent to the server over a short period of time.

    No update is required to address this vulnerability

    Users are protected against this vulnerability if the Web Servers SSL Flooding Denial of Service protection found in the Protection section of CPAI-2011-505 has been applied.


    1. In the IPS tab, click Protections, find the Web Servers SSL Flooding Denial of Service protection using the Search tool and double-click on the protection.

    2. In the Protection Details window, select the required profile and then click on Edit. Choose the protection's Action (Override IPS Policy with: Prevent/Detect), and apply Additional Settings.

    3. Configure the protection to your requirements.

    4. Install policy on all modules.


    SmartView Tracker will log the following entries:
    Attack Name: Web Server Enforcement Violation
    Attack Information: Web servers SSL flooding denial of service