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https://github.com/vincentmli/bpfire.git
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0aff7b8196
Handcrafted requests with shell commands could be sent to these CGI files and gain shell access as unprivileged user. References: #11087 Reported-by: Yann Cam <yann.cam@gmail.com> Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>
290 lines
7.8 KiB
Perl
290 lines
7.8 KiB
Perl
#!/usr/bin/perl
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###############################################################################
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# #
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# IPFire.org - A linux based firewall #
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# Copyright (C) 2007 Michael Tremer & Christian Schmidt #
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# #
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# This program is free software: you can redistribute it and/or modify #
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# it under the terms of the GNU General Public License as published by #
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# the Free Software Foundation, either version 3 of the License, or #
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# (at your option) any later version. #
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# #
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# This program is distributed in the hope that it will be useful, #
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# but WITHOUT ANY WARRANTY; without even the implied warranty of #
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the #
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# GNU General Public License for more details. #
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# #
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# You should have received a copy of the GNU General Public License #
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# along with this program. If not, see <http://www.gnu.org/licenses/>. #
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# #
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###############################################################################
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use CGI qw(param);
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use Apache::Htpasswd;
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use Crypt::PasswdMD5;
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$swroot = "/var/ipfire";
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my %cgiparams;
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my %mainsettings;
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my %proxysettings;
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$proxysettings{'NCSA_MIN_PASS_LEN'} = 6;
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### Initialize environment
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&readhash("${swroot}/main/settings", \%mainsettings);
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&readhash("${swroot}/proxy/advanced/settings", \%proxysettings);
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$language = $mainsettings{'LANGUAGE'};
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### Initialize language
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if ($language =~ /^(\w+)$/) {$language = $1;}
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#
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# Uncomment this to force a certain language:
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# $language='en';
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#
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require "${swroot}/langs/en.pl";
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require "${swroot}/langs/${language}.pl";
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my $userdb = "$swroot/proxy/advanced/ncsa/passwd";
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&readhash("$swroot/ethernet/settings", \%netsettings);
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my $success = 0;
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&getcgihash(\%cgiparams);
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if ($cgiparams{'SUBMIT'} eq $tr{'advproxy chgwebpwd change password'})
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{
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if ($cgiparams{'USERNAME'} eq '')
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{
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$errormessage = $tr{'advproxy errmsg no username'};
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goto ERROR;
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}
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if (($cgiparams{'OLD_PASSWORD'} eq '') || ($cgiparams{'NEW_PASSWORD_1'} eq '') || ($cgiparams{'NEW_PASSWORD_2'} eq ''))
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{
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$errormessage = $tr{'advproxy errmsg no password'};
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goto ERROR;
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}
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if (!($cgiparams{'NEW_PASSWORD_1'} eq $cgiparams{'NEW_PASSWORD_2'}))
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{
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$errormessage = $tr{'advproxy errmsg passwords different'};
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goto ERROR;
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}
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if (length($cgiparams{'NEW_PASSWORD_1'}) < $proxysettings{'NCSA_MIN_PASS_LEN'})
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{
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$errormessage = $tr{'advproxy errmsg password length 1'}.$proxysettings{'NCSA_MIN_PASS_LEN'}.$tr{'advproxy errmsg password length 2'};
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goto ERROR;
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}
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my $htpasswd = new Apache::Htpasswd("$userdb");
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# Check if a user with this name exists
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my $old_password = $htpasswd->fetchPass($cgiparams{'USERNAME'});
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if (!$old_password) {
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$errormessage = $tr{'advproxy errmsg invalid user'};
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goto ERROR;
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}
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# Reset password
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if (!$htpasswd->htpasswd($cgiparams{'USERNAME'}, $cgiparams{'NEW_PASSWORD_1'},
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$cgiparams{'OLD_PASSWORD'})) {
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$errormessage = $tr{'advproxy errmsg password incorrect'};
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goto ERROR;
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}
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$success = 1;
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undef %cgiparams;
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}
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ERROR:
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print "Pragma: no-cache\n";
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print "Cache-control: no-cache\n";
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print "Connection: close\n";
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print "Content-type: text/html\n\n";
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print <<END
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<html>
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<head>
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<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
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<title></title>
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</head>
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<body bgcolor="#FFFFFF">
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<center>
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<form method='post' action='$ENV{'SCRIPT_NAME'}'>
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<table width="80%" cellspacing="10" cellpadding="5">
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<tr>
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<td bgcolor="#FFFFFF" align="center">
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<table width="100%" cellspacing="10" cellpadding="10" bordercolor="#9A9A9A" border="1">
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<tr>
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<td nowrap bgcolor="#993333" align="center" >
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<font face="trebuchet ms, helvetica, sans-serif" color="#FFFFFF" size="4">
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<b>$tr{'advproxy chgwebpwd change web password'}</b>
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</font>
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</td>
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</tr>
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<tr>
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<td align="center">
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<table width="50%" cellspacing="7" cellpadding="7">
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<tr>
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<td nowrap bgcolor="#FFFFFF" align="left">
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<font face="trebuchet ms, helvetica, sans-serif" color="#666666" size="2">
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<b>$tr{'advproxy chgwebpwd username'}:</b>
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</font>
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</td>
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<td ><input type="text" name="USERNAME" value="$cgiparams{'USERNAME'}" size="30"></td>
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</tr>
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<tr>
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<td nowrap bgcolor="#FFFFFF" align="left">
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<font face="trebuchet ms, helvetica, sans-serif" color="#666666" size="2">
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<b>$tr{'advproxy chgwebpwd old password'}:</b>
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</font>
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</td>
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<td><input type="password" name="OLD_PASSWORD" value="$cgiparams{'OLD_PASSWORD'}" size="30"></td>
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</tr>
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<tr>
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<td nowrap bgcolor="#FFFFFF" align="left">
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<font face="trebuchet ms, helvetica, sans-serif" color="#666666" size="2">
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<b>$tr{'advproxy chgwebpwd new password'}:</b>
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</font>
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</td>
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<td><input type="password" name="NEW_PASSWORD_1" value="$cgiparams{'NEW_PASSWORD_1'}" size="30"></td>
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</tr>
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<tr>
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<td nowrap bgcolor="#FFFFFF" align="left">
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<font face="trebuchet ms, helvetica, sans-serif" color="#666666" size="2">
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<b>$tr{'advproxy chgwebpwd new password confirm'}:</b>
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</font>
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</td>
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<td><input type="password" name="NEW_PASSWORD_2" value="$cgiparams{'NEW_PASSWORD_2'}" size="30"></td>
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</tr>
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</table>
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<table width="100%" cellspacing="7" cellpadding="7">
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<tr>
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<td align="center"><br><input type='submit' name='SUBMIT' value="$tr{'advproxy chgwebpwd change password'}"></td>
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</tr>
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</table>
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</td>
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</tr>
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END
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;
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if ($errormessage)
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{
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print <<END
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<tr>
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<td nowrap bgcolor="#FF0000" align="center">
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<font face="trebuchet ms, helvetica, sans-serif" color="#FFFFFF" size="2">
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<b>$tr{'advproxy chgwebpwd ERROR'}</b> $errormessage
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</font>
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</td>
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</tr>
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END
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;
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}
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if ($success)
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{
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print <<END
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<tr>
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<td nowrap bgcolor="#00C000" align="center">
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<font face="trebuchet ms, helvetica, sans-serif" color="#FFFFFF" size="2">
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<b>$tr{'advproxy chgwebpwd SUCCESS'}</b> $tr{'advproxy errmsg change success'}
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</font>
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</td>
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</tr>
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END
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;
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}
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print <<END
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</td>
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</tr>
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</table>
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</table>
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</form>
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</center>
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</body>
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</html>
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END
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;
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# -------------------------------------------------------------------
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sub readhash
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{
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my $filename = $_[0];
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my $hash = $_[1];
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my ($var, $val);
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if (-e $filename)
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{
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open(FILE, $filename) or die "Unable to read file $filename";
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while (<FILE>)
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{
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chop;
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($var, $val) = split /=/, $_, 2;
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if ($var)
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{
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$val =~ s/^\'//g;
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$val =~ s/\'$//g;
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# Untaint variables read from hash
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$var =~ /([A-Za-z0-9_-]*)/; $var = $1;
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$val =~ /([\w\W]*)/; $val = $1;
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$hash->{$var} = $val;
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}
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}
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close FILE;
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}
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}
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# -------------------------------------------------------------------
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sub getcgihash
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{
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my ($hash, $params) = @_;
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my $cgi = CGI->new ();
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return if ($ENV{'REQUEST_METHOD'} ne 'POST');
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if (!$params->{'wantfile'}) {
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$CGI::DISABLE_UPLOADS = 1;
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$CGI::POST_MAX = 512 * 1024;
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} else {
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$CGI::POST_MAX = 10 * 1024 * 1024;
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}
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$cgi->referer() =~ m/^https?\:\/\/([^\/]+)/;
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my $referer = $1;
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$cgi->url() =~ m/^https?\:\/\/([^\/]+)/;
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my $servername = $1;
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return if ($referer ne $servername);
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### Modified for getting multi-vars, split by |
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%temp = $cgi->Vars();
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foreach my $key (keys %temp) {
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$hash->{$key} = $temp{$key};
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$hash->{$key} =~ s/\0/|/g;
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$hash->{$key} =~ s/^\s*(.*?)\s*$/$1/;
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}
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if (($params->{'wantfile'})&&($params->{'filevar'})) {
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$hash->{$params->{'filevar'}} = $cgi->upload
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($params->{'filevar'});
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}
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return;
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}
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# -------------------------------------------------------------------
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