FTP Privileged Port Bounce Scan

high Nessus Plugin ID 10081
New! Plugin Severity Now Using CVSS v3

The calculated severity for Plugins has been updated to use CVSS v3 by default. Plugins that do not have a CVSS v3 score will fall back to CVSS v2 for calculating severity. Severity display preferences can be toggled in the settings dropdown.


The remote FTP server is vulnerable to a FTP server bounce attack.


It is possible to force the remote FTP server to connect to third parties using the PORT command.

The problem allows intruders to use your network resources to scan other hosts, making them think the attack comes from your network.


See the CERT advisory in the references for solutions and workarounds.

See Also


Plugin Details

Severity: High

ID: 10081

File Name: ftp_bounce.nasl

Version: 1.49

Type: remote

Family: FTP

Published: 6/22/1999

Updated: 11/15/2018

Dependencies: ftpserver_detect_type_nd_version.nasl, ftp_anonymous.nasl, ftp_kibuv_worm.nasl

Risk Information

CVSS Score Source: CVE-1999-0017


Risk Factor: Low

Score: 3.4


Risk Factor: High

Base Score: 7.5

Temporal Score: 5.5

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

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


Risk Factor: High

Base Score: 7.3

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

Vulnerability Information

Required KB Items: ftp/login

Excluded KB Items: ftp/ncftpd

Exploit Ease: No known exploits are available

Vulnerability Publication Date: 7/12/1995

Reference Information

CVE: CVE-1999-0017

BID: 126

CERT-CC: CA-1997-27