Password guessing games with Check Point firewall

Wednesday, 4 September 2002, 1:58 AM EST

Security researchers have discovered two potentially serious flaws with Check Point's flagship FireWall-1 firewall which give rise to both username guessing and sniffing issues.

First, affected versions permit attackers to determine if a firewall username is valid without having to know the associated password. This enabling crackers to guess valid usernames using a dictionary attack.

The guessing rate is limited mostly by the firewall CPU rather than by the Internet link speed, according to security testing specialists NTA Monitor, which discovered the problem. In effect, this means that companies using a hi-spec firewall server increase the speed at which an attacker can guess passwords, NTA warns.

In addition, NTA Monitor discovered that VPN usernames are passed in the clear without encryption, allowing anyone who is able to sniff network traffic between VPN clients and the firewall to observe usernames in transit. The flaws exploit the Internet Key Exchange (IKE) encryption scheme and affect all Check Point FireWall-1 systems of 4.0 or above.

[ Read more ]

Related items




Spotlight

Staples customers likely the latest victims of credit card breach

Posted on 21 October 2014.  |  Multiple banks say they have identified a pattern of credit and debit card fraud suggesting that several Staples Inc. office supply locations in the Northeastern United States are currently dealing with a data breach.


Weekly newsletter

Reading our newsletter every Monday will keep you up-to-date with security news.
  



Daily digest

Receive a daily digest of the latest security news.
  

DON'T
MISS

Wed, Oct 22nd
    COPYRIGHT 1998-2014 BY HELP NET SECURITY.   // READ OUR PRIVACY POLICY // ABOUT US // ADVERTISE //