IKE: CheckPoint VPN-1 ISAKMP Invalid DER Length

This signature detects attempts to exploit a known vulnerability in the ISAKMP implementation used by CheckPoint VPN-1. Attackers can send a malformed ISAKMP packet to gain control of the firewall.

Extended Description

A remote buffer overflow vulnerability is reported in Check Point VPN-1 that may allow a remote attacker to execute arbitrary code in order to gain unauthorized access. This issue results from insufficient boundary checks performed by the application when processing user-supplied data. This overflow occurs during the initial key exchange process, and can be triggered with a single UDP packet. Since ISAKMP uses the UDP transport, a spoofed source address can be used in an attack. Check Point reports that for a single packet attack to succeed, VPN-1 must be configured for aggressive mode key exchange. Without aggressive mode, an attacker must initiate a real key negotiation session. This vulnerability can lead to remote code execution in the context of the VPN-1 process. This can lead to a complete system compromise. Check Point has released an advisory and fixes for this issue.

Affected Products

Check_point_software firewall-1_gx

Short Name
IKE:INV-DER-LEN
Severity
Major
Recommended
False
Recommended Action
Drop
Category
IKE
Keywords
CVE-2004-0699 CheckPoint DER ISAKMP Invalid Length VPN-1 bid:10820
Release Date
09/01/2004
Supported Platforms

srx-branch-12.3

srx-19.3

srx-branch-19.3

vsrx3bsd-19.2

srx-branch-19.4

vsrx-19.4

mx-12.3

mx-19.4

vmx-19.4

mx-19.3

vsrx3bsd-19.4

srx-19.4

vsrx-12.3

vmx-19.3

vsrx-19.2

srx-12.3

Sigpack Version
3375
False Positive
Unknown
Vendors

Check_point_software

CVSS Score

7.5

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