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RSI.0003.05-15-98.HP-UX.RWRITE
From: advise () ENIGMA REPSEC COM (RSI Advise)
Date: Mon, 8 Jun 1998 17:32:28 -0700


RSI.0003.05-15-98.HP-UX.RWRITE


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                   Repent Security Incorporated, RSI
                       [ http://www.repsec.com ]


                       *** RSI ALERT ADVISORY ***


--- [CREDIT] --------------------------------------------------------------

'Bwana Brian': Research and development
Mark Zielinski: Author of advisory


--- [SUMMARY] -------------------------------------------------------------

Announced:     May 15, 1998
Report code:   RSI.0003.05-15-98.HP-UX.RWRITE
Report title:  HP-UX rwrite/rlpdaemon
Vulnerability: Remote users can send commands to your terminal via
               escape sequences sent to the rlpdaemon
Vendor status: Sun, 31 May 1998
Patch status:  No patch currently available
Platforms:     HP-UX 9.X, 10.X
Vulnerable:    Systems running rlpdaemon where users use hpterm
Reference:     http://www.repsec.com/advisories.html
Impact:        If exploited, an attacker could remotely compromise an
               account on your system, including root


--- [DETAILS] -------------------------------------------------------------

Problem:       If a user has an hpterm session logged in to an HP-UX that
               is running rlpdaemon, it is possible for an attacker to
               remotely compromise the active account.

               By sending carefully selected packets to the rlpdaemon, an
               attacker can force a user's terminal to display a message
               that contains escape sequences with embedded commands that
               reprogram the soft-keys of the hpterm, allowing for arbitrary
               playback and key remapping.  The user does not need to have
               'mesg y' on for this to happen.

               This problem is present in any HP-UX running the current
               version of rlpdaemon.


--- [FIX] -----------------------------------------------------------------

Solution:      Disable rlpdaemon until Hewlett-Packard can provide
               a patch.


--- [PATCH] ---------------------------------------------------------------

Solution:      No patches are currently available.


---------------------------------------------------------------------------

Repent Security Incorporated (RSI)
advise () repsec com
13610 N. Scottsdale Rd.
Suite #10-326
Scottsdale, AZ
85254

[ http://www.repsec.com ]

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Copyright April 1998  RepSec, Inc.

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