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<?xml version="1.0" encoding="utf-8"?>
<glsa id="200506-08">
<title>GNU shtool, ocaml-mysql: Insecure temporary file creation</title>
GNU shtool and ocaml-mysql are vulnerable to symlink attacks, potentially
allowing a local user to overwrite arbitrary files.
<product type="ebuild">GNU shtool</product>
<announced>June 11, 2005</announced>
<revised>June 11, 2005: 01</revised>
<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 name="dev-ml/ocaml-mysql" auto="yes" arch="*">
<unaffected range="ge">1.0.3-r1</unaffected>
<vulnerable range="lt">1.0.3-r1</vulnerable>
GNU shtool is a compilation of small shell scripts into a single
shell tool. The ocaml-mysql package includes the GNU shtool code.
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).
<impact type="normal">
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.
There is no known workaround at this time.
All GNU shtool users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=dev-util/shtool-2.0.1-r2&quot;</code>
All ocaml-mysql users should upgrade to the latest version:
# emerge --sync
# emerge --ask --oneshot --verbose &quot;&gt;=dev-ml/ocaml-mysql-1.0.3-r1&quot;</code>
<uri link="">CAN-2005-1751</uri>
<uri link="">CAN-2005-1759</uri>
<metadata tag="requester" timestamp="Fri, 27 May 2005 16:05:53 +0000">
<metadata tag="submitter" timestamp="Sat, 28 May 2005 21:16:10 +0000">
<metadata tag="bugReady" timestamp="Fri, 10 Jun 2005 15:51:35 +0000">