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<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="200405-20">
<title>Insecure Temporary File Creation In MySQL</title>
<synopsis>
Two MySQL utilities create temporary files with hardcoded paths, allowing
an attacker to use a symlink to trick MySQL into overwriting important
data.
</synopsis>
<product type="ebuild">MySQL</product>
<announced>2004-05-25</announced>
<revised count="01">2004-05-25</revised>
<bug>46242</bug>
<access>local </access>
<affected>
<package name="dev-db/mysql" auto="yes" arch="*">
<unaffected range="ge">4.0.18-r2</unaffected>
<vulnerable range="lt">4.0.18-r2</vulnerable>
</package>
</affected>
<background>
<p>
MySQL is a popular open-source multi-threaded, multi-user SQL database
server.
</p>
</background>
<description>
<p>
The MySQL bug reporting utility (mysqlbug) creates a temporary file to log
bug reports to. A malicious local user with write access to the /tmp
directory could create a symbolic link of the name mysqlbug-<i>N</i>
pointing to a protected file, such as /etc/passwd, such that when mysqlbug
creates the <i>N</i>th log file, it would end up overwriting the target
file. A similar vulnerability exists with the mysql_multi utility, which
creates a temporary file called mysql_multi.log.
</p>
</description>
<impact type="normal">
<p>
Since mysql_multi runs as root, a local attacker could use this to destroy
any other users' data or corrupt and destroy system files.
</p>
</impact>
<workaround>
<p>
One could modify both scripts to log to a directory that users do not have
write permission to, such as /var/log/mysql/.
</p>
</workaround>
<resolution>
<p>
All users should upgrade to the latest stable version of MySQL.
</p>
<code>
# emerge sync
# emerge -pv "&gt;=dev-db/mysql-4.0.18-r2"
# emerge "&gt;=dev-db/mysql-4.0.18-r2"</code>
</resolution>
<references>
<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0381">CAN-2004-0381</uri>
<uri link="https://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0388">CAN-2004-0388</uri>
</references>
<metadata tag="submitter">
dmargoli
</metadata>
</glsa>