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Cisco Router SYNful Knock Vulnerability

Information

Severity

Severity

Critical

Family

Family

CISCO

CVSSv2 Base

CVSSv2 Base

10.0

CVSSv2 Vector

CVSSv2 Vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Solution Type

Solution Type

Vendor Wont Fix

Created

Created

6 years ago

Modified

Modified

3 years ago

Summary

This host has Cisco router and is prone to SYNful Knock vulnerability.

Insight

Insight

The flaw is due to cisco router firmware allowing remote attacker to change the memory values.

Affected Software

Affected Software

Cisco 1841 Cisco 2811 Cisco 3825

Detection Method

Detection Method

Send a crafted tcp packet request and check whether it is able to obtain valuable information or not

Solution

Solution

No known solution was made available for at least one year since the disclosure of this vulnerability. Likely none will be provided anymore. General solution options are to upgrade to a newer release, disable respective features, remove the product or replace the product by another one.