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luci-mod-status: fix potential XSS via specially crafted DNS names

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When an upstream NS returns PTR domain names containing HTML, it is
added verbatim to the connection status table.

Prevent this issue by HTML escaping any values in the source and
destination columns.

Fixes: CVE-2021-32019
Signed-off-by: Jo-Philipp Wich <jo@mein.io>
(cherry picked from commit 3c66c5b165)
This commit is contained in:
Jo-Philipp Wich 2021-05-12 11:49:31 +02:00
parent 766e8f8cbf
commit e2abb45b0e
1 changed files with 2 additions and 2 deletions
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4
modules/luci-mod-status/htdocs/luci-static/resources/view/status/connections.js
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@ -133,8 +133,8 @@ return view.extend({
rows.push([
c.layer3.toUpperCase(),
c.layer4.toUpperCase(),
c.hasOwnProperty('sport') ? (src + ':' + c.sport) : src,
c.hasOwnProperty('dport') ? (dst + ':' + c.dport) : dst,
'%h'.format(c.hasOwnProperty('sport') ? (src + ':' + c.sport) : src),
'%h'.format(c.hasOwnProperty('dport') ? (dst + ':' + c.dport) : dst),
'%1024.2mB (%d %s)'.format(c.bytes, c.packets, _('Pkts.'))
]);
}