Stack-based buffer overflow in Check Point VPN-1 Server 4.1 through 4.1 SP6 and Check Point SecuRemote/SecureClient 4.1 through 4.1 build 4200 allows remote attackers to execute arbitrary code via an ISAKMP packet with a large Certificate Request packet.
https://exchange.xforce.ibmcloud.com/vulnerabilities/14150
http://xforce.iss.net/xforce/alerts/id/163
http://www.securityfocus.com/bid/9582
http://www.kb.cert.org/vuls/id/873334