RPC rpcbind Non-standard Port Assignment Filter Bypass

medium Nessus Plugin ID 20759
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Synopsis

An ONC RPC portmapper is running on the remote host.

Description

The RPC portmapper is running on this port.

The portmapper allows someone to get the port number of each RPC service running on the remote host by sending either multiple lookup requests or a DUMP request.

This service should only run on port 111. However on some operating systems it also listens on different UDP ports. This might allow an attacker to circumvent firewall rules.

Solution

Disable this service if RPC are not used, or update your firewall rules if needed.

Plugin Details

Severity: Medium

ID: 20759

File Name: rpc_portmap_port32771.nasl

Version: 1.13

Type: remote

Family: RPC

Published: 5/25/2007

Updated: 7/27/2018

Dependencies: rpc_portmap.nasl

Risk Information

VPR

Risk Factor: Medium

Score: 5.9

CVSS v2

Risk Factor: Medium

Base Score: 4

Temporal Score: 3

Vector: AV:N/AC:L/Au:S/C:P/I:N/A:N

Temporal Vector: E:U/RL:OF/RC:C

Vulnerability Information

Required KB Items: rpc/portmap/different_port

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 6/4/1997

Reference Information

CVE: CVE-1999-0632, CVE-1999-0189

BID: 205