National Cyber Awareness System

Vulnerability Summary for CVE-2007-2688

Overview

The Cisco Intrusion Prevention System (IPS) and IOS with Firewall/IPS Feature Set do not properly handle certain full-width and half-width Unicode character encodings, which might allow remote attackers to evade detection of HTTP traffic.

Impact

CVSS Severity (version 2.0):

CVSS Version 2 Metrics:

References to Advisories, Solutions, and Tools

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US-CERT Vulnerability Note: VU#739224

Name: VU#739224

Hyperlink:http://www.kb.cert.org/vuls/id/739224

External Source: XF

Name: cisco-scanengine-unicode-security-bypass(34277)

Hyperlink:http://xforce.iss.net/xforce/xfdb/34277

External Source: VUPEN

Name: ADV-2007-1803

Hyperlink:http://www.vupen.com/english/advisories/2007/1803

External Source: SECTRACK

Name: 1018054

Hyperlink:http://www.securitytracker.com/id?1018054

External Source: SECTRACK

Name: 1018053

Hyperlink:http://www.securitytracker.com/id?1018053

External Source: BID

Name: 23980

Hyperlink:http://www.securityfocus.com/bid/23980

External Source: BUGTRAQ

Name: 20070515 GS07-01 Full-Width and Half-Width Unicode Encoding IDS/IPS/WAF Bypass Vulnerability

Hyperlink:http://www.securityfocus.com/archive/1/archive/1/468633/100/0/threaded

External Source: MISC

Name: http://www.gamasec.net/english/gs07-01.html

Hyperlink:http://www.gamasec.net/english/gs07-01.html

External Source: CISCO

Name: 20070514 HTTP Full-Width and Half-Width Unicode Encoding Evasion

Hyperlink:http://www.cisco.com/en/US/products/products_security_response09186a008083f82e.html

External Source: SECUNIA

Name: 25285

Type: Advisory

Hyperlink:http://secunia.com/advisories/25285

External Source: OVAL

Name: oval:org.mitre.oval:def:5465

Hyperlink:http://oval.mitre.org/repository/data/getDef?id=oval:org.mitre.oval:def:5465

External Source: OSVDB

Name: 35336

Hyperlink:http://www.osvdb.org/35336

References to Check Content

Identifier:oval:org.mitre.oval:def:5465

Check System:http://oval.mitre.org/XMLSchema/oval-definitions-5

Hyperlink:http://oval.mitre.org/repository/data/DownloadDefinition?id=oval:org.mitre.oval:def:5465