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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200406-18">
<title>gzip: Insecure creation of temporary files</title>
<synopsis>
gzip contain a bug potentially allowing an attacker to execute arbitrary
commands.
</synopsis>
<product type="ebuild">gzip</product>
<announced>June 24, 2004</announced>
<revised>May 22, 2006: 02</revised>
<bug>54890</bug>
<access>local</access>
<affected>
<package name="app-arch/gzip" auto="yes" arch="*">
<unaffected range="ge">1.3.3-r4</unaffected>
<vulnerable range="le">1.3.3-r3</vulnerable>
</package>
</affected>
<background>
<p>
gzip (GNU zip) is popular compression program. The included gzexe
utility allows you to compress executables in place and have them
automatically uncompress and execute when you run them.
</p>
</background>
<description>
<p>
The script gzexe included with gzip contains a bug in the code that
handles tempfile creation. If the creation of a temp file fails when
using gzexe fails instead of bailing out it executes the command given
as argument.
</p>
</description>
<impact type="normal">
<p>
This could lead to priviege escalation by running commands under the
rights of the user running the self extracting file.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time. All users are encouraged to
upgrade to the latest available version.
</p>
</workaround>
<resolution>
<p>
All gzip users should upgrade to the latest stable version:
</p>
<code>
# emerge sync
# emerge -pv &quot;&gt;=app-arch/gzip-1.3.3-r4&quot;
# emerge &quot;&gt;=app-arch/gzip-1.3.3-r4&quot;</code>
<p>
Additionally, once the upgrade is complete, all self extracting files
created with earlier versions gzexe should be recreated, since the
vulnerability is actually embedded in those executables.
</p>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2004-0603">CVE-2004-0603</uri>
</references>
<metadata tag="submitter">
jaervosz
</metadata>
</glsa>