TCP/IP Multicast Address Handling Remote DoS (spank.c)

medium Nessus Plugin ID 11901

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Synopsis

The remote host responds to TCP packets that are coming from a multicast IP address.

Description

Nessus has detected that the remote host responds to TCP packets that are coming from a multicast IP address. An attacker can exploit this to conduct a 'spank' denial of service attack, resulting in the host being shut down or network traffic reaching saturation. Also, this vulnerability can be used by an attacker to conduct stealth port scans against the host.

Solution

Contact your operating system vendor for a patch. Alternatively, filter out multicast IP addresses (224.0.0.0/4).

Plugin Details

Severity: Medium

ID: 11901

File Name: spank.nasl

Version: Revision: 1.20

Type: remote

Family: Denial of Service

Published: 10/22/2003

Updated: 3/2/2017

Supported Sensors: Nessus

Risk Information

CVSS v2

Risk Factor: Medium

Base Score: 6.1

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

CVSS v3