Patch-ID# 101482-01 Keywords: security, dump, in.comsat, in.talkd, shutdown, syslogd, write, 4.1.x Synopsis: SunOS 4.1.3, 4.1.2, 4.1.1: Security update for write. Date: Mar/16/94 Solaris Release: 1.1 SunOS Release: 4.1.3C 4.1.3 4.1.2 4.1.1 Unbundled Product: Unbundled Release: Relevant Architectures: sparc NOTE: sun3 sun3x sun4 sun4c sun4m BugId's fixed with this patch: 1140162 Changes incorporated in this version: 1140162 Patches accumulated and obsoleted by this patch: Patches which conflict with this patch: Patches required with this patch: >100272-07 >100593-03 >100909-02 101480 101481 NOTE:100272(-07+) 100593(-03+) 100909(-02+) 101480 101481 Obsoleted by: NOTE:4.1.3_U1 Files included with this patch: write Problem Description: 1140162 Several programs, as originally shipped, could be exploited in an obscure way to gain root access. Patch Installation Instructions: 1) Login as root. 2) Make a backup copy of the old file: mv /usr/bin/write /usr/bin/write.fcs 3) Change the permissions on the saved file to prevent its execution: chmod 400 /usr/bin/write.fcs 4) Copy in the patched file: cp `uname -m`/`uname -r`/write /usr/bin/write 5) Set ownership & permissions: chown root /usr/bin/write chgrp tty /usr/bin/write chmod 2755 /usr/bin/write