blob: 3b0c673bf349aced611633b9b9574bf888f84672 [file] [log] [blame]
<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200511-17">
<title>FUSE: mtab corruption through fusermount</title>
<synopsis>
The fusermount utility from FUSE can be abused to corrupt the /etc/mtab
file contents, potentially allowing a local attacker to set unauthorized
mount options.
</synopsis>
<product type="ebuild">FUSE</product>
<announced>November 22, 2005</announced>
<revised>November 22, 2005: 01</revised>
<bug>112902</bug>
<access>local</access>
<affected>
<package name="sys-fs/fuse" auto="yes" arch="*">
<unaffected range="ge">2.4.1-r1</unaffected>
<vulnerable range="lt">2.4.1-r1</vulnerable>
</package>
</affected>
<background>
<p>
FUSE (Filesystem in Userspace) allows implementation of a fully
functional filesystem in a userspace program. The fusermount utility is
used to mount/unmount FUSE file systems.
</p>
</background>
<description>
<p>
Thomas Biege discovered that fusermount fails to securely handle
special characters specified in mount points.
</p>
</description>
<impact type="normal">
<p>
A local attacker could corrupt the contents of the /etc/mtab file
by mounting over a maliciously-named directory using fusermount,
potentially allowing the attacker to set unauthorized mount options.
This is possible only if fusermount is installed setuid root, which is
the default in Gentoo.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All FUSE users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=sys-fs/fuse-2.4.1-r1&quot;</code>
</resolution>
<references>
<uri link="http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2005-3531">CVE-2005-3531</uri>
</references>
<metadata tag="requester" timestamp="Sun, 20 Nov 2005 12:06:35 +0000">
jaervosz
</metadata>
<metadata tag="submitter" timestamp="Mon, 21 Nov 2005 13:30:54 +0000">
koon
</metadata>
<metadata tag="bugReady" timestamp="Tue, 22 Nov 2005 16:07:17 +0000">
koon
</metadata>
</glsa>