<html>
<head>
<base href="https://bugzilla.netfilter.org/" />
</head>
<body><table border="1" cellspacing="0" cellpadding="8">
<tr>
<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW - No warning for weird interface characters if interface contains wildcard character"
href="https://bugzilla.netfilter.org/show_bug.cgi?id=1085">1085</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>No warning for weird interface characters if interface contains wildcard character
</td>
</tr>
<tr>
<th>Product</th>
<td>iptables
</td>
</tr>
<tr>
<th>Version</th>
<td>CVS (please indicate timestamp)
</td>
</tr>
<tr>
<th>Hardware</th>
<td>All
</td>
</tr>
<tr>
<th>OS</th>
<td>All
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>trivial
</td>
</tr>
<tr>
<th>Priority</th>
<td>P5
</td>
</tr>
<tr>
<th>Component</th>
<td>iptables
</td>
</tr>
<tr>
<th>Assignee</th>
<td>netfilter-buglog@lists.netfilter.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>netfilterbugzilla@s.cdmweb.de
</td>
</tr></table>
<p>
<div>
<pre>When I try to match on an interface with illegal characters (e.g. whitespace or
/), I get a warning, as expected:
# iptables -A FORWARD -i "asd f"
Warning: weird character in interface `asd f' ('/' and ' ' are not allowed by
the kernel).
The rule is inserted successfully into the ruleset.
However, when I make the interface match a wildcard, I do no longer get the
warning:
# iptables -A FORWARD -i "asd f+"
Expected behavior: I get a warning about the whitespace in my interface match.
Observed behavior Rule is accepted without any warning, iptables-save confirms
that the rule was successfully inserted.
The issue can be seen directly in the function xtables_parse_interface:
<a href="https://git.netfilter.org/iptables/tree/libxtables/xtables.c?h=v1.6.0#n518">https://git.netfilter.org/iptables/tree/libxtables/xtables.c?h=v1.6.0#n518</a>
The for loop which checks for weird characters is not executed if the interface
match string ends on '+'.
Version: iptables 1.6.0
As of git commit 921dfe98c69b7a71e31e48df79f4986d7bde7810 (HEAD on 30th Aug
2016), the mentioned code did not change.</pre>
</div>
</p>
<hr>
<span>You are receiving this mail because:</span>
<ul>
<li>You are watching all bug changes.</li>
</ul>
</body>
</html>