Check Point VPN-1 products contain boundary error in the ASN.1 decoding library

Overview

A vulnerability exists in Check Point’s VPN-1 Server, which is included in many Check Point products. This vulnerability may permit a remote attacker to compromise the gateway system.

Description

Check Point VPN-1 Server is a Virtual Private Network (VPN) application. A buffer overflow condition exists in an ASN.1 decoding library used by the VPN-1 software. This vulnerability could be exploited during the negotiation process of establishing a new VPN connection. To exploit this vulnerability, an attacker must initiate an IKE negotiation and then send a malformed IKE packet. The exploit packet must be encrypted, which prevents its detection by using a signature. However, if Aggressive Mode IKE is implemented, this vulnerability may be exploited via a single packet.

According to ISS X-Force’s advisory, the following products are reported as vulnerable:

* VPN-1/FireWall-1 NG with Application Intelligence R54
* VPN-1/FireWall-1 NG with Application Intelligence R55
* VPN-1/FireWall-1 NG with Application Intelligence R55W 
* VPN-1/FireWall-1 Next Generation FP3 
* VPN-1/FireWall-1 VSX FireWall-1 GX 
* VPN-1 SecuRemote/SecureClient All Versions

For more details, please see the Check Point security alert.

Impact

A remote attacker may be able to compromise the VPN gateway system.

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Solution

Apply the appropriate patch from Check Point’s security alert to address this issue.

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Vendor Information

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Updated: August 02, 2004

Status

Affected

Vendor Statement

We have not received a statement from the vendor.

Vendor Information

The vendor has not provided us with any further information regarding this vulnerability.

Addendum

Please see <http://www.checkpoint.com/techsupport/alerts/asn1.html&gt;.

If you have feedback, comments, or additional information about this vulnerability, please send us [email](<mailto:[email protected]?Subject=VU%23435358 Feedback>).

CVSS Metrics

Group	Score	Vector
Base
Temporal
Environmental

References

• <http://xforce.iss.net/xforce/alerts/id/178&gt;
• <http://www.checkpoint.com/techsupport/alerts/asn1.html&gt;
• <http://secunia.com/advisories/12177/&gt;
• <http://www.ciac.org/ciac/bulletins/o-190.shtml&gt;

Acknowledgements

Thanks to Mark Dowd and Neel Mehta of the ISS X-Force for reporting this vulnerability.

This document was written by Jason A Rafail.

Other Information

CVE IDs:	CVE-2004-0699
Severity Metric:	15.75 Date Public: