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Full Discussion: How do I remove commands?
Top Forums UNIX for Dummies Questions & Answers How do I remove commands? Post 302460312 by DGPickett on Wednesday 6th of October 2010 11:47:28 AM
Old 10-06-2010
So, there are no available daemons for direct listening to spawn rsh, rlogin and rcp (rsync, remsh, rexec, . . . ?)? Still, just removing/commenting inetd and maybe services lines seems fragile.

All the system distributions should deliver these commands as an optional package that you do not install, unless you accept the vulnerabilities and have some need to support them, way yesterday dude! Smilie

These vulnerabilities should be down to near the same level as ftp and telnet if properly configured: plain text data on the network, but with the added concern of passwordless login between hosts. If there are not configurable controls to block * user or host, then as root, you can scan for dumb .rhosts files on every host. They are not so bad on well firewalled subnets of an intranet.
 

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.K5LOGIN(5)							File Formats Manual						       .K5LOGIN(5)

NAME
.k5login - Kerberos V5 acl file for host access. DESCRIPTION
The .k5login file, which resides in a user's home directory, contains a list of the Kerberos principals. Anyone with valid tickets for a principal in the file is allowed host access with the UID of the user in whose home directory the file resides. One common use is to place a .k5login file in root's home directory, thereby granting system administrators remote root access to the host via Kerberos. EXAMPLES
Suppose the user "alice" had a .k5login file in her home directory containing the following line: bob@FUBAR.ORG This would allow "bob" to use any of the Kerberos network applications, such as telnet(1), rlogin(1), rsh(1), and rcp(1), to access alice's account, using bob's Kerberos tickets. Let us further suppose that "alice" is a system administrator. Alice and the other system administrators would have their principals in root's .k5login file on each host: alice@BLEEP.COM joeadmin/root@BLEEP.COM This would allow either system administrator to log in to these hosts using their Kerberos tickets instead of having to type the root pass- word. Note that because "bob" retains the Kerberos tickets for his own principal, "bob@FUBAR.ORG", he would not have any of the privileges that require alice's tickets, such as root access to any of the site's hosts, or the ability to change alice's password. SEE ALSO
telnet(1), rlogin(1), rsh(1), rcp(1), ksu(1), telnetd(8), klogind(8) .K5LOGIN(5)
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