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firewall.cgi: Fixes XSS potential

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commit 21539d63dfcb15f186309b3107f63d455e4008ea
Author: Adolf Belka <adolf.belka@ipfire.org>
Date:   Thu Oct 2 13:10:15 2025 +0200

    firewall.cgi: Fixes XSS potential

    - Related to CVE-2025-50975
    - Fixes PROT
    - ruleremark was already escaped when firewall.cgi was initially merged back in Core
       Update 77.
    - SRC_PORT, TGT_PORT, dnaport, src_addr & tgt_addr are already validated in the code as
       ports or port ranges.
    - std_net_tgt is a string defined in the code and not a variable
    - The variable key ignores any input that is not a digit and subsequently uses the next
       free rulenumber digit

    Signed-off-by: Adolf Belka <adolf.belka@ipfire.org>
    Signed-off-by: Michael Tremer <michael.tremer@ipfire.org>

Signed-off-by: Vincent Li <vincent.mc.li@gmail.com>
This commit is contained in:
Vincent Li
2025-10-03 18:09:01 +00:00
parent 578eb58ea0
commit 0e302b1efc
1 changed files with 3 additions and 1 deletions
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4
html/cgi-bin/firewall.cgi
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@@ -2,7 +2,8 @@
###############################################################################
# #
# IPFire.org - A linux based firewall #
# Copyright (C) 2013 Alexander Marx <amarx@ipfire.org> #
# Copyright (C) 2013-2025 IPFire Team <info@ipfire.org> #
# Copyright (C) 2024-2025 BPFire Team <vincent.mc.li@gmail.com> #
# #
# This program is free software: you can redistribute it and/or modify #
# it under the terms of the GNU General Public License as published by #
@@ -2400,6 +2401,7 @@ sub saverule
$fwdfwsettings{'ruleremark'}=~ s/,/;/g;
utf8::decode($fwdfwsettings{'ruleremark'});
$fwdfwsettings{'ruleremark'}=&Header::escape($fwdfwsettings{'ruleremark'});
$fwdfwsettings{'PROT'}=&Header::escape($fwdfwsettings{'PROT'});
if ($fwdfwsettings{'updatefwrule'} ne 'on'){
my $key = &General::findhasharraykey ($hash);
$$hash{$key}[0] = $fwdfwsettings{'RULE_ACTION'};