Cisco IOS GRE Decapsulation Vulnerability

Low Nessus Plugin ID 17789


The remote device is missing a vendor-supplied security patch.


The remote device contains a flaw in the way GRE packets are handled. By sending a specially crafted GRE packet, an attacker can take advantage of this flaw to potentially bypass access-control lists.


Apply the relevant patch referenced in Cisco Security Advisory cisco-sr-20060906-gre.

See Also

Plugin Details

Severity: Low

ID: 17789

File Name: cisco-sr-20060906-gre.nasl

Version: 1.6

Type: local

Family: CISCO

Published: 2012/01/10

Updated: 2018/11/15

Dependencies: 47864

Risk Information

Risk Factor: Low

CVSS Score Source: CVE-2006-4650

CVSS v2.0

Base Score: 2.6

Vector: CVSS2#AV:N/AC:H/Au:N/C:P/I:N/A:N

CVSS v3.0

Base Score: 4

Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:N/A:N

Vulnerability Information

CPE: cpe:/o:cisco:ios

Required KB Items: Host/Cisco/IOS/Version

Patch Publication Date: 2006/09/06

Vulnerability Publication Date: 2006/09/06

Reference Information

CVE: CVE-2006-4650