You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
73 lines
2.5 KiB
73 lines
2.5 KiB
<?xml version="1.0" encoding="utf-8"?>
|
|
<?xml-stylesheet href="/xsl/glsa.xsl" type="text/xsl"?>
|
|
<?xml-stylesheet href="/xsl/guide.xsl" type="text/xsl"?>
|
|
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
|
|
|
|
<glsa id="200507-20">
|
|
<title>Shorewall: Security policy bypass</title>
|
|
<synopsis>
|
|
A vulnerability in Shorewall allows clients authenticated by MAC address
|
|
filtering to bypass all other security rules.
|
|
</synopsis>
|
|
<product type="ebuild">shorewall</product>
|
|
<announced>July 22, 2005</announced>
|
|
<revised>September 14, 2005: 02</revised>
|
|
<bug>99398</bug>
|
|
<access>remote</access>
|
|
<affected>
|
|
<package name="net-firewall/shorewall" auto="yes" arch="*">
|
|
<unaffected range="ge">2.4.2</unaffected>
|
|
<vulnerable range="le">2.4.1</vulnerable>
|
|
</package>
|
|
</affected>
|
|
<background>
|
|
<p>
|
|
Shorewall is a high level tool for configuring Netfilter, the firewall
|
|
facility included in the Linux Kernel.
|
|
</p>
|
|
</background>
|
|
<description>
|
|
<p>
|
|
Shorewall fails to enforce security policies if configured with
|
|
"MACLIST_DISPOSITION" set to "ACCEPT" or "MACLIST_TTL" set to a value
|
|
greater or equal to 0.
|
|
</p>
|
|
</description>
|
|
<impact type="low">
|
|
<p>
|
|
A client authenticated by MAC address filtering could bypass all
|
|
security policies, possibly allowing him to gain access to restricted
|
|
services. The default installation has MACLIST_DISPOSITION=REJECT and
|
|
MACLIST_TTL=(blank) (equivalent to 0). This can be checked by looking
|
|
at the settings in /etc/shorewall/shorewall.conf
|
|
</p>
|
|
</impact>
|
|
<workaround>
|
|
<p>
|
|
Set "MACLIST_TTL" to "0" and "MACLIST_DISPOSITION" to "REJECT" in the
|
|
Shorewall configuration file (usually /etc/shorewall/shorewall.conf).
|
|
</p>
|
|
</workaround>
|
|
<resolution>
|
|
<p>
|
|
All Shorewall users should upgrade to the latest available version:
|
|
</p>
|
|
<code>
|
|
# emerge --sync
|
|
# emerge --ask --oneshot --verbose net-firewall/shorewall</code>
|
|
</resolution>
|
|
<references>
|
|
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2317">CAN-2005-2317</uri>
|
|
<uri link="http://www.shorewall.net/News.htm#20050717">Shorewall Announcement</uri>
|
|
</references>
|
|
<metadata tag="requester" timestamp="Wed, 20 Jul 2005 08:32:24 +0000">
|
|
koon
|
|
</metadata>
|
|
<metadata tag="submitter" timestamp="Wed, 20 Jul 2005 09:04:23 +0000">
|
|
DerCorny
|
|
</metadata>
|
|
<metadata tag="bugReady" timestamp="Thu, 21 Jul 2005 21:07:14 +0000">
|
|
DerCorny
|
|
</metadata>
|
|
</glsa>
|