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Last updated: 9/19/2014 5:52:27 PM

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National Cyber Awareness System

Vulnerability Summary for CVE-2006-4650

Original release date: 09/08/2006
Last revised: 03/07/2011
Source: US-CERT/NIST

Overview

Cisco IOS 12.0, 12.1, and 12.2, when GRE IP tunneling is used and the RFC2784 compliance fixes are missing, does not verify the offset field of a GRE packet during decapsulation, which leads to an integer overflow that references data from incorrect memory locations, which allows remote attackers to inject crafted packets into the routing queue, possibly bypassing intended router ACLs.

Impact

CVSS Severity (version 2.0):
CVSS v2 Base Score: 2.6 (LOW) (AV:N/AC:H/Au:N/C:P/I:N/A:N) (legend)
Impact Subscore: 2.9
Exploitability Subscore: 4.9
CVSS Version 2 Metrics:
Access Vector: Network exploitable
Access Complexity: High
Authentication: Not required to exploit
Impact Type: Allows unauthorized disclosure of information

References to Advisories, Solutions, and Tools

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External Source: OSVDB
Name: 28590
External Source: VUPEN
Name: ADV-2006-3502
External Source: SECTRACK
Name: 1016799
External Source: OVAL
Name: oval:org.mitre.oval:def:5713
External Source: MISC
Name: http://www.phenoelit.de/stuff/CiscoGRE.txt
Type: Advisory
External Source: BUGTRAQ
Name: 20060906 Cisco IOS GRE issue
Type: Advisory
External Source: SECUNIA
Name: 21783
External Source: XF
Name: cisco-ios-gre-acl-bypass(28786)
External Source: SREASON
Name: 1526
External Source: BID
Name: 19878
External Source: CISCO
Name: 20060906 Cisco IOS GRE Decapsulation Vulnerability

References to Check Content

Identifier: oval:org.mitre.oval:def:5713
Check System: http://oval.mitre.org/XMLSchema/oval-definitions-5

Technical Details

Vulnerability Type (View All)