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Vulnerability Details : CVE-2006-4650

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.
Publish Date : 2006-09-08 Last Update Date : 2009-03-04
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- CVSS Scores & Vulnerability Types

CVSS Score
2.6
Confidentiality Impact Partial (There is considerable informational disclosure.)
Integrity Impact None (There is no impact to the integrity of the system)
Availability Impact None (There is no impact to the availability of the system.)
Access Complexity High (Specialized access conditions exist. It is hard to exploit and several special conditions must be satisfied to exploit)
Authentication Not required (Authentication is not required to exploit the vulnerability.)
Gained Access None
Vulnerability Type(s) OverflowBypass a restriction or similar
CWE ID CWE id is not defined for this vulnerability

- Related OVAL Definitions

Title Definition Id Class Family
Cisco IOS GRE Source Routing Integer Overflow ACL Bypass Vulnerability oval:org.mitre.oval:def:5713 ios
OVAL (Open Vulnerability and Assessment Language) definitions define exactly what should be done to verify a vulnerability or a missing patch. Check out the OVAL definitions if you want to learn what you should do to verify a vulnerability.

- Products Affected By CVE-2006-4650

# Product Type Vendor Product Version Update Edition Language
1 OS Cisco IOS 12.0 Version Details Vulnerabilities
2 OS Cisco IOS 12.1 Version Details Vulnerabilities
3 OS Cisco IOS 12.2 Version Details Vulnerabilities

- Number Of Affected Versions By Product

Vendor Product Vulnerable Versions
Cisco IOS 3

- References For CVE-2006-4650

http://www.frsirt.com/english/advisories/2006/3502
VUPEN ADV-2006-3502
http://www.securityfocus.com/bid/19878
BID 19878 Cisco IOS Multiple GRE Source Routing Vulnerabilities Release Date:2006-09-07
http://www.osvdb.org/28590
OSVDB 28590
http://securitytracker.com/id?1016799
SECTRACK 1016799
http://xforce.iss.net/xforce/xfdb/28786
XF cisco-ios-gre-acl-bypass(28786)
http://www.cisco.com/en/US/tech/tk827/tk369/tsd_technology_security_response09186a008072cd7b.html
CISCO 20060906 Cisco IOS GRE Decapsulation Vulnerability
http://www.phenoelit.de/stuff/CiscoGRE.txt
http://www.securityfocus.com/archive/1/archive/1/445322/100/0/threaded
BUGTRAQ 20060906 Cisco IOS GRE issue
http://securityreason.com/securityalert/1526
SREASON 1526
http://secunia.com/advisories/21783
SECUNIA 21783

- Metasploit Modules Related To CVE-2006-4650

There are not any metasploit modules related to this vulnerability (Please visit www.metasploit.com for more information)


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