{IRM} AND AUTOMATED DATA PROCESSOR {ADP} COORDINATORS
U-1,280/DS-SIM {DCPO}
SUBJ:  PROBLEM WITH IN.TELNETD AND IN.RLOGIND IN SUNOS 4.0.3
{AUTOMATED SYSTEMS SECURITY INCIDENT SUPPORT TEAM {ASSIST} 92-45}
1.  DICSUSSION: ASSIST HAS LEARNED ABOUT SECURITY VULNERABILITIES
IN IN.TELNETD AND IN.RLOGIND OF SUNOS 4.0.3.  THE VENDOR HAS CREATED
A FIX FOR THE IN.TELNETD AND IN.LOGIND UTILITIES TO PATCH SUNOS
4.0.3 SYSTEMS.  IF NOT PATCHED, THESE UTILITIES MAY ALLOW
UNAUTHORIZED ACCESS TO SYSTEMS.  THE PATCH IS AVAILABLE FROM SUN
MICROSYSTEMS AS THE UPDATED PATCH ID# 100125-03 (THIS NUMBER IS
REQUIRED TO ORDER THIS PATCH FROM THE SUN ANSWER CENTER).  THIS
PATCH IS ALSO AVAILABLE VIA ANONYMOUS FTP AT UUNET.UU.NET (IP#
192.48.96.2) IN THE FILE SUN-DIST/100125-03.TAR.Z.  THIS PATCH FILE
DOES NOT CONTAIN INSTALLATION INSTRUCTIONS.  WE RECOMMEND THE
FOLLOWING INSTALLATION PROCEDURES:
A. LOG IN AS ROOT ON THE SYSTEM TO BE REPAIRED.
B. DISABLE THE FLAWED VERSION OF IN.TELNETD AND IN.RLOGIND WITH THE
FOLLOWING COMMANDS:
MV /USR/ETC/IN.TELNETD /USR/ETC/IN.TELNETD.FCS
MV /USR/ETC/IN.RLOGIND /USR/ETC/IN.RLOGIND.FCS
CHMOD 600 /USR/ETC/IN.TELNETD.FCS /USR/ETC/IN.RLOGIND.FCS
C. OBTAIN THE PATCH FILE 100125-03.TAR.Z (EITHER FROM SUN OR A
TRUSTED ANONYMOUS FTP SITE SUCH AS UUNET.UU.NET).
D. UNCOMPRESS THE PATCH FILE:
UNCOMPRESS 100125-03.TAR.Z
2.  EXTRACT THE PATCH FILE APPROPRIATE TO YOUR ARCHITECTURE (EITHER
SUN3, SUN3X, SUN4, OR SUN4C -- CONTACT YOUR SUN REPRESENTATIVE IF
YOU DO NOT KNOW WHICH ARCHITECTURE YOU HAVE) AND YOUR OPERATING
SYSTEM LEVEL (EITHER 4.0.3 OR 4.0.3C):
TAR XF 100125-03.TAR {ARCHITECTURE}/4.0.3/IN.TELNETD
TAR XF 100125-03.TAR {ARCHITECTURE}/4.0.3/IN.RLOGIND
WHERE {ARCHITECTURE} IS ONE OF SUN3, SUN3X, SUN4, OR SUN4C*.
COPY THE PATCH FILE TO THE APPROPRIATE DIRECTORY, AND SET THE
OWNERSHIP AND PERMISSIONS OF THE UTILITY:
CP {ARCHITECTURE}/4.0.3/IN.TELNETD /USR/ETC/IN.TELNETD
CP {ARCHITECTURE}/4.0.3/IN.RLOGIND /USR/ETC/IN.RLOGIND
CHOWN ROOT.STAFF /USR/ETC/IN.TELNETD /USR/ETC/IN.RLOGIND
CHMOD 711 /USR/ETC/IN.TELNETD /USR/ETC/IN.RLOGIND. 
3.  KILL ANY EXISTING TELNET AND RLOGIN PROCESSES THAT MAY BE
RUNNING:
PS GAX | GREP IN.TELNETD
PS GAX | GREP IN.RLOGIND
KILL -9 ####
WHERE #### IS THE NUMBER OF EACH IN.TELNETD PROCESS FOUND IN     THE
PREVIOUS PS COMMANDS.  PLEASE NOTE THAT THIS COMMAND MAY    DISRUPT
ONGOING SESSIONS OF USERS ATTEMPTING TO USE THE SYSTEM.  AS AN
ALTERNATIVE TO THIS STEP, YOU MAY CONSIDER REBOOTING THE COMPUTER,
ALLOWING TIME FOR ALL CURRENT USERS TO  LOG OUT.  ONCE YOU HAVE
VERIFIED THAT THE NEW VERSION OF TELNET IS OPERATIONAL, IT IS
ADVISABLE TO DELETE THE UNPATCHED VERSION OF THE UTILITIES
/USR/ETC/IN.TELNETD.FCS AND /USR/ETC/IN.RLOGIND.FCS TO PREVENT THEIR
UNAUTHORIZED USE.
4.  POINT OF CONTACT: ASSIST POINT OF CONTACT FOR THIS MATTER IS
MIKE HIGGINS, COMM {202} 373-8852/55 OR DSN 243-8852/55.  ASSIST
CAN BE REACHED 24 HOURS PER DAY, COMMERCIAL PAGER {800} SKY-PAGE, 
PIN NUMBER 2133937 {FROM A TOUCH TONE PHONE ENTER THE CALL BACK
NUMBER AFTER THE PROMPT} OR AUTOVON DIAL 243-8000 AND ASK TO HAVE
THE ASSIST DUTY OFFICER PAGED.  ASSIST CAN BE REACHED VIA E-MAIL AT
"DOD-CERT{AT-SIGN}DDN-CONUS.DDN.MIL."