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National Cyber-Alert System

Vulnerability Summary for CVE-2006-4774

Original release date:09/14/2006
Last revised:09/10/2008
Source: US-CERT/NIST

Overview

The VLAN Trunking Protocol (VTP) feature in Cisco IOS 12.1(19) allows remote attackers to cause a denial of service by sending a VTP version 1 summary frame with a VTP version field value of 2.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score:7.8 (HIGH) (AV:N/AC:L/Au:N/C:N/I:N/A:C) (legend)
Impact Subscore: 6.9
Exploitability Subscore: 10.0
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: Low
Authentication: Not required to exploit
Impact Type:Allows disruption of serviceUnknown

References to Advisories, Solutions, and Tools

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US-CERT Vulnerability Note: VU#821420
Name: VU#821420
Hyperlink:http://www.kb.cert.org/vuls/id/821420
External Source: CISCO
Name: 20060913 Cisco VLAN Trunking Protocol Vulnerabilities
Type: Patch Information
Hyperlink:http://www.cisco.com/warp/public/707/cisco-sr-20060913-vtp.shtml
External Source: BID
Name: 19998
Hyperlink:http://www.securityfocus.com/bid/19998
External Source: BUGTRAQ
Name: 20060913 Re: Cisco IOS VTP issues
Hyperlink:http://www.securityfocus.com/archive/1/archive/1/445938/100/0/threaded
External Source: BUGTRAQ
Name: 20060913 Cisco IOS VTP issues
Type: Advisory
Hyperlink:http://www.securityfocus.com/archive/1/archive/1/445896/100/0/threaded
External Source: XF
Name: cisco-ios-vtp-version-dos(28924)
Hyperlink:http://xforce.iss.net/xforce/xfdb/28924
External Source: MISC
Name: http://www.phenoelit.de/stuff/CiscoVTP.txt
Hyperlink:http://www.phenoelit.de/stuff/CiscoVTP.txt
External Source: OSVDB
Name: 28775
Hyperlink:http://www.osvdb.org/28775
External Source: VUPEN
Name: ADV-2006-3600
Hyperlink:http://www.frsirt.com/english/advisories/2006/3600
External Source: SECTRACK
Name: 1016843
Hyperlink:http://securitytracker.com/id?1016843
External Source: SECUNIA
Name: 21896
Hyperlink:http://secunia.com/advisories/21896

Vulnerable software and versions

Nav control imageConfiguration 1
spacerNav control imageOR
spacerspacerNav control image* cpe:/o:cisco:ios:12.1%2819%29
* Denotes Vulnerable Software
* Changes related to vulnerability configurations

Technical Details

Vulnerability Type (View All)
CVE Standard Vulnerability Entry:http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2006-4774