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Gentoo Linux Security Advisory GLSA 200405-20 |
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http://security.gentoo.org/ |
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Severity: Normal |
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Title: Insecure Temporary File Creation In MySQL |
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Date: May 25, 2004 |
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Bugs: #46242 |
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ID: 200405-20 |
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Synopsis |
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======== |
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|
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Two MySQL utilities create temporary files with hardcoded paths, |
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allowing an attacker to use a symlink to trick MySQL into overwriting |
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important data. |
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Background |
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========== |
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|
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MySQL is a popular open-source multi-threaded, multi-user SQL database |
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server. |
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|
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Affected packages |
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================= |
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|
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------------------------------------------------------------------- |
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Package / Vulnerable / Unaffected |
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------------------------------------------------------------------- |
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1 dev-db/mysql < 4.0.18-r2 >= 4.0.18-r2 |
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Description |
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=========== |
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|
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The MySQL bug reporting utility (mysqlbug) creates a temporary file to |
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log bug reports to. A malicious local user with write access to the |
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/tmp directory could create a symbolic link of the name mysqlbug-N |
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pointing to a protected file, such as /etc/passwd, such that when |
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mysqlbug creates the Nth log file, it would end up overwriting the |
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target file. A similar vulnerability exists with the mysql_multi |
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utility, which creates a temporary file called mysql_multi.log. |
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|
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Impact |
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====== |
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|
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Since mysql_multi runs as root, a local attacker could use this to |
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destroy any other users' data or corrupt and destroy system files. |
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|
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Workaround |
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========== |
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|
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One could modify both scripts to log to a directory that users do not |
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have write permission to, such as /var/log/mysql/. |
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Resolution |
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========== |
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All users should upgrade to the latest stable version of MySQL. |
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# emerge sync |
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# emerge -pv ">=dev-db/mysql-4.0.18-r2" |
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# emerge ">=dev-db/mysql-4.0.18-r2" |
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|
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References |
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========== |
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|
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[ 1 ] CAN-2004-0381 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0381 |
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[ 2 ] CAN-2004-0388 |
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http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0388 |
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|
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Availability |
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============ |
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|
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This GLSA and any updates to it are available for viewing at |
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the Gentoo Security Website: |
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|
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http://security.gentoo.org/glsa/glsa-200405-20.xml |
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Concerns? |
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========= |
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|
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Security is a primary focus of Gentoo Linux and ensuring the |
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confidentiality and security of our users machines is of utmost |
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importance to us. Any security concerns should be addressed to |
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security@g.o or alternatively, you may file a bug at |
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http://bugs.gentoo.org. |
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|
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License |
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======= |
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Copyright 2004 Gentoo Technologies, Inc; referenced text |
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belongs to its owner(s). |
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The contents of this document are licensed under the |
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Creative Commons - Attribution / Share Alike license. |
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http://creativecommons.org/licenses/by-sa/1.0 |
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