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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200504-25">
<title>Rootkit Hunter: Insecure temporary file creation</title>
<synopsis>
Rootkit Hunter is vulnerable to symlink attacks, potentially allowing a
local user to overwrite arbitrary files.
</synopsis>
<product type="ebuild">rkhunter</product>
<announced>April 26, 2005</announced>
<revised>April 26, 2005: 01</revised>
<bug>90007</bug>
<access>local</access>
<affected>
<package name="app-forensics/rkhunter" auto="yes" arch="*">
<unaffected range="ge">1.2.3-r1</unaffected>
<vulnerable range="lt">1.2.3-r1</vulnerable>
</package>
</affected>
<background>
<p>
Rootkit Hunter is a scanning tool to detect rootkits, backdoors
and local exploits on a local machine. Rootkit Hunter uses downloaded
data files to check file integrity. These files are updated via the
check_update.sh script.
</p>
</background>
<description>
<p>
Sune Kloppenborg Jeppesen and Tavis Ormandy of the Gentoo Linux
Security Team have reported that the check_update.sh script and the
main rkhunter script insecurely creates several temporary files with
predictable filenames.
</p>
</description>
<impact type="normal">
<p>
A local attacker could create symbolic links in the temporary
files directory, pointing to a valid file somewhere on the filesystem.
When rkhunter or the check_update.sh script runs, this would result in
the file being overwritten with the rights of the user running the
utility, which could be the root user.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All Rootkit Hunter users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=app-forensics/rkhunter-1.2.3-r1&quot;</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1270">CAN-2005-1270</uri>
</references>
<metadata tag="submitter" timestamp="Tue, 26 Apr 2005 06:10:01 +0000">
jaervosz
</metadata>
<metadata tag="bugReady" timestamp="Tue, 26 Apr 2005 18:37:38 +0000">
koon
</metadata>
</glsa>