rlogin Service Detection

high Nessus Plugin ID 10205


The rlogin service is running on the remote host.


The rlogin service is running on the remote host. This service is vulnerable since data is passed between the rlogin client and server in cleartext. A man-in-the-middle attacker can exploit this to sniff logins and passwords. Also, it may allow poorly authenticated logins without passwords. If the host is vulnerable to TCP sequence number guessing (from any network) or IP spoofing (including ARP hijacking on a local network) then it may be possible to bypass authentication.
Finally, rlogin is an easy way to turn file-write access into full logins through the .rhosts or rhosts.equiv files.


Comment out the 'login' line in /etc/inetd.conf and restart the inetd process. Alternatively, disable this service and use SSH instead.

Plugin Details

Severity: High

ID: 10205

File Name: rlogin.nasl

Version: 1.36

Type: remote

Published: 8/30/1999

Updated: 4/11/2022

Configuration: Enable thorough checks

Supported Sensors: Nessus

Risk Information


Risk Factor: Medium

Score: 5.9


Risk Factor: High

Base Score: 7.5

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

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Vulnerability Publication Date: 1/1/1990

Exploitable With

Metasploit (rlogin Authentication Scanner)

Reference Information

CVE: CVE-1999-0651