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Vulnerability of Check Point Firewall VPN-1: obtaining the hostname

Synthesis of the vulnerability 

An unauthenticated attacker can send a query to the SecuRemote Topology service, in order to obtain the name of the firewall.
Vulnerable products: CheckPoint SecuRemote, VPN-1.
Severity of this weakness: 1/4.
Creation date: 12/03/2012.
Références of this bulletin: sk69360, VIGILANCE-VUL-11424.

Description of the vulnerability 

The VPN SecuRemote service of the Check Point firewall listens on port 264/tcp, in order to provide topology information to VPN clients.

An unauthenticated client can connect to this service, and obtains a certificate. However, the Common Name field of this certificate indicates the firewall name and the SmartCenter name.

An unauthenticated attacker can therefore send a query to the SecuRemote Topology service, in order to obtain the name of the firewall.

It can be noted that this information can be seen as public, but it can be used to detect a firewall.
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This weakness alert impacts software or systems such as CheckPoint SecuRemote, VPN-1.

Our Vigil@nce team determined that the severity of this computer vulnerability note is low.

The trust level is of type contradictory sources, with an origin of intranet client.

A proof of concept or an attack tool is available, so your teams have to process this alert. An attacker with a technician ability can exploit this security bulletin.

Solutions for this threat 

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