Check Point Advisories

SSL Tunneling

Check Point Reference: CPSA-2005-17
Date Published: 8 Aug 2004
Severity: N/A
Last Updated: 1 Jan 2000
Protection Provided by:

Security Gateway
R71, R70

Who is Vulnerable?
Vulnerability Description SSL encrypted communication between internal clients and servers outside the organization can leave the client that initiates the encrypted connection vulnerable to attacks sent through the encrypted tunnel. The client machine could potentially infect other machines, so that the internal network is at risk. . Peer to Peer applications are examples of applications that can use SSL encryption.

Protection Overview

This protection detects and blocks SSL encrypted client to server communication originating at internal clients. Clients are prevented from opening encrypted connections on non-standard ports. This protection supports the Secure Sockets Layer (SSL v2/v3), and Transport Layer Security (TLS v1) protocols. It is possible to specify ports for which encrypted connections are allowed. The detect mode makes it possible to track unauthorized traffic without blocking it.

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, click on Protection tab and select the version of your choice.

Security Gateway R70 / R71

  1. In the IPS tab, click Protections and find the SSL Tunneling protection using the Search tool and Edit the protection's settings.
  2. Install policy on all modules.

This protection's log will contain the following information:.

Attack Name:  SSL Tunneling.
Attack Information:  SSL Tunneling was detected on the connection

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