virus???????? Post: 23853

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Top Forums UNIX for Dummies Questions & Answers virus???????? Post 23853 by LivinFree on Monday 1st of July 2002 11:44:23 AM

07-01-2002

Registered User

Quote:

Unix is not as secure as you folks seem to think. A somewhat recent example was the rlogin bug.

Well, I take that as a mitigated risk. Many sites concerned about security have not run rlogin, or any of the r* services for that matter, for a very long time because it's not only a plaintext login agent, but it's inherent security problems make it undesirable as well. I bet there's a few people out there with an old fingerd that's vunerable to the Morris worm, but what's the likelyhood? Heck, even ssh isn't 100% proof, as recent history has shown. It's truly up to the competence of the administrator to make these decisions - is ssh worth the hassle for 80% security, or do we trust our network enough for rlogin and 60% security?
Frankly, no network is 100% safe, but of course if you know somewhat what you're doing, the likelyhood of exploitation drops exponentially.

How many "Unix" viriii have you seen? There have been a few worms, mostly for Linux and / or Solaris, but no user-initiated virus that were very widespread that I know of.

LivinFree

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LEARN ABOUT PLAN9

pam_rhosts_auth

pam_rhosts_auth(5)					Standards, Environments, and Macros					pam_rhosts_auth(5)

NAME

       pam_rhosts_auth - authentication management PAM module using ruserok()

SYNOPSIS

       /usr/lib/security/pam_rhosts_auth.so.1

DESCRIPTION

       The  rhosts   PAM  module,   /usr/lib/security/pam_rhosts_auth.so.1,  authenticates  a  user  via  the rlogin authentication protocol. Only
       pam_sm_authenticate() is implemented within this module. pam_sm_authenticate() uses the ruserok(3SOCKET) library function  to  authenticate
       the rlogin or rsh user. pam_sm_setcred() is a null function.

       /usr/lib/security/pam_rhosts_auth.so.1  is designed to be stacked on top of  the /usr/lib/security/pam_unix.so.1 module for both the rlogin
       and rsh services. This module is normally configured as sufficient so that subsequent  authentication  is  performed  only  on  failure	of
       pam_sm_authenticate(). The following option may be passed in to this service module:

       debug	       syslog(3C) debugging information at  LOG_DEBUG level.

ATTRIBUTES

       See attributes(5) for descriptions of the following attributes:

       +-----------------------------+-----------------------------+
       |      ATTRIBUTE TYPE	     |	    ATTRIBUTE VALUE	   |
       |MT Level		     |MT-Safe with exceptions	   |
       +-----------------------------+-----------------------------+

SEE ALSO

       pam(3PAM), pam_authenticate(3PAM), ruserok(3SOCKET), syslog(3C), libpam(3LIB), pam.conf(4), attributes(5)

NOTES

       The interfaces in  libpam() are MT-Safe only if each thread within the multi-threaded application uses its own  PAM handle.

SunOS 5.10							    28 Oct 1996 						pam_rhosts_auth(5)