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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200407-07">
<title>Shorewall : Insecure temp file handling</title>
<synopsis>
Shorewall contains a bug in the code handling the creation of temporary
files and directories. This can allow a non-root user to overwrite
arbitrary system files.
</synopsis>
<product type="ebuild">Shorewall</product>
<announced>July 08, 2004</announced>
<revised>May 22, 2006: 02</revised>
<bug>55675</bug>
<access>local</access>
<affected>
<package name="net-firewall/shorewall" auto="yes" arch="*">
<unaffected range="ge">1.4.10f</unaffected>
<vulnerable range="le">1.4.10c</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 uses temporary files and directories in an insecure manner. A
local user could create symbolic links at specific locations,
eventually overwriting other files on the filesystem with the rights of
the shorewall process.
</p>
</description>
<impact type="normal">
<p>
An attacker could exploit this vulnerability to overwrite arbitrary
system files with root privileges, resulting in Denial of Service or
further exploitation.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time. All users should upgrade to
the latest available version of Shorewall.
</p>
</workaround>
<resolution>
<p>
All users should upgrade to the latest available version of Shorewall,
as follows:
</p>
<code>
# emerge sync
# emerge -pv &quot;&gt;=net-firewall/shorewall-1.4.10f&quot;
# emerge &quot;&gt;=net-firewall/shorewall-1.4.10f&quot;</code>
</resolution>
<references>
<uri link="http://lists.shorewall.net/pipermail/shorewall-announce/2004-June/000385.html">Shorewall Announcement</uri>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0647">CVE-2004-0647</uri>
</references>
<metadata tag="submitter">
jaervosz
</metadata>
</glsa>