Reported February 4, 2004 by ISS.

 

 

VERSIONS AFFECTED

 

  • Checkpoint VPN-1 Server 4.1 SP6 (with OpenSSL Hotfix) and earlier

  • Checkpoint SecuRemote and SecureClient 4.1, build 4200 and earlier

 

DESCRIPTION

 

A vulnerability in Checkpoint VPN-1 Server and Client can result in the compromise of the vulnerable system. This vulnerability exists because the product doesn't perform adequate bounds checking, thereby triggering a simple stack overflow. This vulnerability occurs during the handling of ISAKMP packets that have large Certificate Request payloads. During the initial phases of an IKE negotiation, a remote unauthenticated attacker can take advantage of this problem.

 

VENDOR RESPONSE

 

Checkpoint has issued an update about this vulnerability and recommends that affected users immediately apply the available patch.

 

CREDIT

 

Discovered by Mark Dowd and Neel Mehta.