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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200508-19">
<title>lm_sensors: Insecure temporary file creation</title>
<synopsis>
lm_sensors is vulnerable to linking attacks, potentially allowing a local
user to overwrite arbitrary files.
</synopsis>
<product type="ebuild">lm_sensors</product>
<announced>August 30, 2005</announced>
<revised>August 30, 2005: 01</revised>
<bug>103568</bug>
<access>local</access>
<affected>
<package name="sys-apps/lm_sensors" auto="yes" arch="*">
<unaffected range="ge">2.9.1-r1</unaffected>
<vulnerable range="lt">2.9.1-r1</vulnerable>
</package>
</affected>
<background>
<p>
lm_sensors is a software package that provides drivers for
monitoring the temperatures, voltages, and fans of Linux systems with
hardware monitoring devices.
</p>
</background>
<description>
<p>
Javier Fernandez-Sanguino Pena has discovered that lm_sensors
insecurely creates temporary files with predictable filenames when
saving configurations.
</p>
</description>
<impact type="normal">
<p>
A local attacker could create symbolic links in the temporary file
directory, pointing to a valid file somewhere on the filesystem. When
the pwmconfig script of lm_sensors is executed, this would result in
the file being overwritten with the rights of the user running the
script, which typically is the root user.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All lm_sensors users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=sys-apps/lm_sensors-2.9.1-r1&quot;</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-2672">CAN-2005-2672</uri>
</references>
<metadata tag="requester" timestamp="Sat, 27 Aug 2005 09:37:19 +0000">
koon
</metadata>
<metadata tag="bugReady" timestamp="Sat, 27 Aug 2005 09:38:55 +0000">
koon
</metadata>
<metadata tag="submitter" timestamp="Sat, 27 Aug 2005 22:28:16 +0000">
formula7
</metadata>
</glsa>