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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200506-08">
<title>GNU shtool, ocaml-mysql: Insecure temporary file creation</title>
<synopsis>
GNU shtool and ocaml-mysql are vulnerable to symlink attacks, potentially
allowing a local user to overwrite arbitrary files.
</synopsis>
<product type="ebuild">GNU shtool</product>
<announced>June 11, 2005</announced>
<revised>June 11, 2005: 01</revised>
<bug>93782</bug>
<bug>93784</bug>
<access>local</access>
<affected>
<package name="dev-util/shtool" auto="yes" arch="*">
<unaffected range="ge">2.0.1-r2</unaffected>
<vulnerable range="lt">2.0.1-r2</vulnerable>
</package>
<package name="dev-ml/ocaml-mysql" auto="yes" arch="*">
<unaffected range="ge">1.0.3-r1</unaffected>
<vulnerable range="lt">1.0.3-r1</vulnerable>
</package>
</affected>
<background>
<p>
GNU shtool is a compilation of small shell scripts into a single
shell tool. The ocaml-mysql package includes the GNU shtool code.
</p>
</background>
<description>
<p>
Eric Romang has discovered that GNU shtool insecurely creates
temporary files with predictable filenames (CAN-2005-1751). On closer
inspection, Gentoo Security discovered that the shtool temporary file,
once created, was being reused insecurely (CAN-2005-1759).
</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 a GNU shtool script is executed, this would result in the file
being overwritten with the rights of the user running the script, which
could be the root user.
</p>
</impact>
<workaround>
<p>
There is no known workaround at this time.
</p>
</workaround>
<resolution>
<p>
All GNU shtool users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-util/shtool-2.0.1-r2"</code>
<p>
All ocaml-mysql users should upgrade to the latest version:
</p>
<code>
# emerge --sync
# emerge --ask --oneshot --verbose ">=dev-ml/ocaml-mysql-1.0.3-r1"</code>
</resolution>
<references>
<uri link="http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1751">CAN-2005-1751</uri>
<uri link="http://www.cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2005-1759">CAN-2005-1759</uri>
</references>
<metadata tag="requester" timestamp="Fri, 27 May 2005 16:05:53 +0000">
vorlon078
</metadata>
<metadata tag="submitter" timestamp="Sat, 28 May 2005 21:16:10 +0000">
formula7
</metadata>
<metadata tag="bugReady" timestamp="Fri, 10 Jun 2005 15:51:35 +0000">
koon
</metadata>
</glsa>
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