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CVE-2006-4650

2.6 · LOW

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…

Published Sep 9, 2006ciscoEPSS 3.23%

Overview

CVE-2006-4650 is a low-severity vulnerability affecting cisco ios. It was published on September 9, 2006 and has a CVSS 2.0 base score of 2.6 (LOW).

This vulnerability has a CVSS 2.0 base score of 2.6, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories and patches from cisco. Update ios to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

Affected products

VendorProductVersionsStatus

References

Refsecunia.com/advisories/21783Refsecurityreason.com/securityalert/1526Refsecuritytracker.com/id?1016799Refwww.cisco.com/en/US/tech/tk827/tk369/tsd_technology_security_response09186a008072cd7b.htmlRefwww.osvdb.org/28590Refwww.phenoelit.de/stuff/CiscoGRE.txtRefwww.securityfocus.com/archive/1/445322/100/0/threadedRefwww.securityfocus.com/bid/19878Refwww.vupen.com/english/advisories/2006/3502Refexchange.xforce.ibmcloud.com/vulnerabilities/28786

How CyberStrike helps

Frequently asked questions

What is CVE-2006-4650?

CVE-2006-4650 is a low-severity vulnerability affecting cisco ios. It was published on September 9, 2006 and has a CVSS 2.0 base score of 2.6 (LOW).

How severe is CVE-2006-4650?

This vulnerability has a CVSS 2.0 base score of 2.6, rated LOW. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2006-4650?

Check the references section for vendor advisories and patches from cisco. Update ios to the latest patched version. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2006-4650?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2006-4650 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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