Check Point VPN-1/SecureClient up to 1.4.1 SP5 ISAKMP stack-based overflow

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k0.00

Summaryinfo

A vulnerability classified as critical was found in Check Point VPN-1 and SecureClient up to 1.4.1 SP5. This impacts an unknown function of the component ISAKMP Handler. The manipulation results in stack-based overflow. This vulnerability is cataloged as CVE-2004-0040. The attack may be launched remotely. Furthermore, there is an exploit available. Upgrading the affected component is advised.

Detailsinfo

A vulnerability classified as critical has been found in Check Point VPN-1 and SecureClient up to 1.4.1 SP5 (Network Encryption Software). Affected is an unknown function of the component ISAKMP Handler. The manipulation with an unknown input leads to a stack-based overflow vulnerability. CWE is classifying the issue as CWE-121. A stack-based buffer overflow condition is a condition where the buffer being overwritten is allocated on the stack (i.e., is a local variable or, rarely, a parameter to a function). This is going to have an impact on confidentiality, integrity, and availability. CVE summarizes:

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.

The bug was discovered 02/02/2004. The weakness was shared 02/04/2004 by Chris Wysopal with ISS X-Force (Website). The advisory is shared for download at xforce.iss.net. This vulnerability is traded as CVE-2004-0040. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details are unknown but a public exploit is available.

It is declared as proof-of-concept. The vulnerability was handled as a non-public zero-day exploit for at least 2 days. During that time the estimated underground price was around $5k-$25k. The commercial vulnerability scanner Qualys is able to test this issue with plugin 34017 (Check Point SecuRemote ISAKMP Large Certificate Request Payload Buffer Overflow Vulnerability).

Upgrading to version 4.1 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at securityfocus.com. The best possible mitigation is suggested to be upgrading to the latest version. Attack attempts may be identified with Snort ID 2378. In this case the pattern |07| is used for detection. Furthermore it is possible to detect and prevent this kind of attack with TippingPoint and the filter 31735.

The vulnerability is also documented in the databases at X-Force (14150), SecurityFocus (BID 9582†), OSVDB (4432†), Secunia (SA10795†) and Vulnerability Center (SBV-3664†). Further details are available at checkpoint.com. VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
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NVD Base Score: 🔍

Exploitinginfo

Class: Stack-based overflow
CWE: CWE-121 / CWE-119
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Access: Public
Status: Proof-of-Concept

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Qualys ID: 🔍
Qualys Name: 🔍

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: VPN-1/SecureClient 4.1
Patch: securityfocus.com

Snort ID: 2378
Snort Message: EXPLOIT ISAKMP third payload certificate request length overflow attempt
Snort Class: 🔍
Snort Pattern: 🔍

Suricata ID: 2102380
Suricata Class: 🔍
Suricata Message: 🔍

TippingPoint: 🔍

McAfee IPS: 🔍
McAfee IPS Version: 🔍

SourceFire IPS: 🔍
ISS Proventia IPS: 🔍
PaloAlto IPS: 🔍

Timelineinfo

02/02/2004 🔍
02/04/2004 +2 days 🔍
02/04/2004 +0 days 🔍
02/05/2004 +1 days 🔍
02/05/2004 +0 days 🔍
02/05/2004 +0 days 🔍
02/05/2004 +0 days 🔍
03/03/2004 +27 days 🔍
03/22/2004 +19 days 🔍
07/13/2025 +7782 days 🔍

Sourcesinfo

Vendor: checkpoint.com

Advisory: xforce.iss.net
Researcher: Chris Wysopal
Organization: ISS X-Force
Status: Confirmed

CVE: CVE-2004-0040 (🔍)
GCVE (CVE): GCVE-0-2004-0040
GCVE (VulDB): GCVE-100-504
CERT: 🔍
X-Force: 14150 - Check Point VPN-1 IKE buffer overflow, High Risk
SecurityFocus: 9582 - Check Point VPN-1/SecuRemote ISAKMP Large Certificate Request Payload Buffer Overflow Vulnerability
Secunia: 10795 - Check Point VPN-1 ISAKMP Buffer Overflow Vulnerability, Highly Critical
OSVDB: 4432 - Check Point VPN-1/SecuRemote ISAKMP Overflow
SecuriTeam: securiteam.com
Vulnerability Center: 3664 - Check Point VPN-1 and Check Point VPN Clients Allow Command Execution, Critical

scip Labs: https://www.scip.ch/en/?labs.20161013
Misc.: 🔍

Entryinfo

Created: 02/05/2004 13:07
Updated: 07/13/2025 19:43
Changes: 02/05/2004 13:07 (95), 06/27/2019 17:05 (4), 12/15/2024 20:55 (20), 07/13/2025 19:43 (2)
Complete: 🔍
Cache ID: 216:82B:103

VulDB is the best source for vulnerability data and more expert information about this specific topic.

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