-----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of X-Force Sent: Thursday, February 05, 2004 3:02 AM To: [EMAIL PROTECTED] Subject: ISS Security Brief: Checkpoint VPN-1/SecureClient ISAKMP Buffer Overflow
-----BEGIN PGP SIGNED MESSAGE----- Internet Security Systems Security Brief February 4, 2004 Checkpoint VPN-1/SecureClient ISAKMP Buffer Overflow Synopsis: ISS X-Force has discovered a flaw in the ISAKMP processing for both the Checkpoint VPN-1 server and Checkpoint VPN clients (Securemote/ SecureClient). These products collaborate to provide VPN access to corporate networks for remote client computers. VPN-1 is the VPN component commonly deployed on Checkpoint Firewall-1 installations. The IKE component of these products allows for the unidirectional or bidirectional authentication of two remote nodes as well as the negotiation of cryptographic capabilities and keys. A buffer overflow vulnerability exists when attempting to handle large certificate payloads. Impact: A remote attacker may exploit this flaw to remotely compromise any VPN-1 server and/or client system running SecureClient/SecureClient. X-Force has developed functional exploit code for this vulnerability and has demonstrated successful attacks using real-world scenarios. Successful compromise of the VPN-1 server can lead directly to complete compromise of the entire Checkpoint Firewall-1 server. Remote attackers can leverage this attack to successfully compromise heavily hardened networks by modifying or tampering with the firewall rules and configuration. Attackers will be able to run commands under the security context of the super-user, usually "SYSTEM", or "root". Any properly configured Firewall-1 among the affected versions with VPN support is vulnerable to this attack by default. In addition, affected versions of VPN-1 SecureRemote / SecureClient are vulnerable to complete remote compromise, expanding exposure to remote VPN clients. Affected Versions: Checkpoint VPN-1 Server 4.1 up to and including SP6 with OpenSSL Hotfix Checkpoint SecuRemote/SecureClient 4.1 up to and including build 4200 For the complete ISS X-Force Security Advisory, please visit: http://xforce.iss.net/xforce/alerts/id/163 ______ About Internet Security Systems (ISS) Founded in 1994, Internet Security Systems (ISS) (Nasdaq: ISSX) is a pioneer and world leader in software and services that protect critical online resources from an ever-changing spectrum of threats and misuse. Internet Security Systems is headquartered in Atlanta, GA, with additional operations throughout the Americas, Asia, Australia, Europe and the Middle East. Copyright (c) 2004 Internet Security Systems, Inc. All rights reserved worldwide. Permission is hereby granted for the electronic redistribution of this document. It is not to be edited or altered in any way without the express written consent of the Internet Security Systems X-Force. If you wish to reprint the whole or any part of this document in any other medium excluding electronic media, please email [EMAIL PROTECTED] for permission. Disclaimer: The information within this paper may change without notice. Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. In no event shall the author/distributor (Internet Security Systems X-Force) be held liable for any damages whatsoever arising out of or in connection with the use or spread of this information. X-Force PGP Key available on MIT's PGP key server and PGP.com's key server, as well as at http://www.iss.net/security_center/sensitive.php Please send suggestions, updates, and comments to: X-Force [EMAIL PROTECTED] of Internet Security Systems, Inc. -----BEGIN PGP SIGNATURE----- Version: 2.6.2 iQCVAwUBQCGV4DRfJiV99eG9AQFOCgP+I6DMjf+aKGOClIMHEjt0AbJeIpZBep19 YqWb8RQQlb+8t4pMrHICOqzf8pAn81ClrPMAu4Yi7NPTegfshnXZ8WZUvwoowyBx dnMRbLanPFKl5zQUSEGbuIP4BBglMINrQOMGgR/kC6FHY8EfahRihYRmXzVpz5oy OyVeANkYM90= =90Od -----END PGP SIGNATURE----- ================================================= To set vacation, Out-Of-Office, or away messages, send an email to [EMAIL PROTECTED] in the BODY of the email add: set fw-1-mailinglist nomail ================================================= To unsubscribe from this mailing list, please see the instructions at http://www.checkpoint.com/services/mailing.html ================================================= If you have any questions on how to change your subscription options, email [EMAIL PROTECTED] =================================================
