Cisco VPN 3000 Concentrator up to 3.5.4/3.6 ISAKMP Packet denial of service

CVSS Meta Temp Score
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CTI Interest Score
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5.1$0-$5k0.00

Summaryinfo

A vulnerability has been found in Cisco VPN 3000 Concentrator up to 3.5.4/3.6 and classified as problematic. The impacted element is an unknown function of the component ISAKMP Packet Handler. This manipulation causes denial of service. This vulnerability is registered as CVE-2002-1103. No exploit is available. The affected component should be upgraded.

Detailsinfo

A vulnerability was found in Cisco VPN 3000 Concentrator up to 3.5.4/3.6 (Network Encryption Software). It has been declared as problematic. Affected by this vulnerability is an unknown part of the component ISAKMP Packet Handler. The manipulation with an unknown input leads to a denial of service vulnerability. The CWE definition for the vulnerability is CWE-404. The product does not release or incorrectly releases a resource before it is made available for re-use. As an impact it is known to affect availability. The summary by CVE is:

Cisco VPN 3000 Concentrator 2.2.x, 3.6(Rel), and 3.x before 3.5.5, allows remote attackers to cause a denial of service via (1) malformed or (2) large ISAKMP packets.

The weakness was published 10/04/2002 by Cisco Security with Cisco as confirmed advisory (CERT.org). It is possible to read the advisory at kb.cert.org. This vulnerability is known as CVE-2002-1103. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. The technical details are unknown and an exploit is not publicly available.

The vulnerability scanner Nessus provides a plugin with the ID 11297 (Cisco VPN 3000 Concentrator Malformed ISAKMP Packet Remote DoS (CSCdy38035)), which helps to determine the existence of the flaw in a target environment. It is assigned to the family CISCO, running in the context l and relying on port 161.

Upgrading to version 3.5.5 eliminates this vulnerability.

The vulnerability is also documented in the databases at X-Force (10028), Tenable (11297), SecurityFocus (BID 5619†) and Vulnerability Center (SBV-2798†). Similar entries are available at VDB-19014, VDB-19013, VDB-19012 and VDB-19011. Be aware that VulDB is the high quality source for vulnerability data.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.1

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

NVD Base Score: 🔍

Exploitinginfo

Class: Denial of service
CWE: CWE-404
CAPEC: 🔍
ATT&CK: 🔍

Physical: No
Local: No
Remote: Yes

Availability: 🔍
Status: Not defined

EPSS Score: 🔍
EPSS Percentile: 🔍

Price Prediction: 🔍
Current Price Estimation: 🔍

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Nessus ID: 11297
Nessus Name: Cisco VPN 3000 Concentrator Malformed ISAKMP Packet Remote DoS (CSCdy38035)
Nessus File: 🔍
Nessus Risk: 🔍
Nessus Family: 🔍
Nessus Context: 🔍
Nessus Port: 🔍

Threat Intelligenceinfo

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

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔍

Upgrade: VPN 3000 Concentrator 3.5.5

Timelineinfo

09/03/2002 🔍
10/04/2002 +31 days 🔍
10/04/2002 +0 days 🔍
01/01/2003 +89 days 🔍
03/01/2003 +59 days 🔍
10/19/2003 +232 days 🔍
07/30/2014 +3937 days 🔍
01/21/2025 +3828 days 🔍

Sourcesinfo

Vendor: cisco.com

Advisory: kb.cert.org
Researcher: Cisco Security
Organization: Cisco
Status: Confirmed

CVE: CVE-2002-1103 (🔍)
GCVE (CVE): GCVE-0-2002-1103
GCVE (VulDB): GCVE-100-19015
CERT: 🔍
X-Force: 10028
SecurityFocus: 5619 - Cisco VPN 3000 Series Concentrator ISAKMP Denial of Service Vulnerabilities
Vulnerability Center: 2798 - [cisco-sa-20020903-vpn3k-vulnerability] VPN Concentrator DoS via ISAKMP Package Processing, High

See also: 🔍

Entryinfo

Created: 07/30/2014 12:47
Updated: 01/21/2025 08:20
Changes: 07/30/2014 12:47 (67), 05/16/2019 16:28 (4), 01/21/2025 08:20 (17)
Complete: 🔍
Cache ID: 216::103

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