(Gentoo Issues Fix) MySQL 'mysqld_multi' Temporary File Flaw Lets Local Users Overwrite Files
|
|
SecurityTracker Alert ID: 1010282 |
|
SecurityTracker URL: http://securitytracker.com/id/1010282
|
|
CVE Reference:
CAN-2004-0388
(Links to External Site)
|
Date: May 25 2004
|
Impact:
Modification of system information, Modification of user information, Root access via local system, User access via local system
|
Fix Available: Yes Vendor Confirmed: Yes
|
Version(s): 4.0.18, 3.23.58
|
Description:
A vulnerability was reported in the MySQL 'mysqld_multi' script. A local user may be able to gain elevated privileges on the target system.
SuSE reported that the 'mysqld_multi' shell script creates a temporary log file ('/tmp/mysqld_multi.log') in an unsafe manner. A local user can create a symbolic link (symlink) from a critical file on the system to this temporary file. Then, when the script is run by a target user, the symlinked file will be overwritten with the privileges of the target user.
A local user may be able to gain elevated privileges on the target system.
|
Impact:
A local user can cause files to be overwritten with the privileges of the target user. A local user may be able to gain elevated privileges on the target system.
|
Solution:
Gentoo has released a fix and recommends that all users upgrade to the latest stable version of MySQL.
# emerge sync
# emerge -pv ">=dev-db/mysql-4.0.18-r2"
# emerge ">=dev-db/mysql-4.0.18-r2"
|
Vendor URL: www.mysql.com/ (Links to External Site)
|
Cause:
Access control error, State error
|
Underlying OS:
Linux (Gentoo)
|
|
Message History:
This archive entry is a follow-up to the message listed below.
|
Source Message Contents
|
Date: Tue, 25 May 2004 22:47:18 +0200
Subject: [gentoo-announce] [ GLSA 200405-20 ] Insecure Temporary File Creation In MySQL
|
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Gentoo Linux Security Advisory GLSA 200405-20
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
http://security.gentoo.org/
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Severity: Normal
Title: Insecure Temporary File Creation In MySQL
Date: May 25, 2004
Bugs: #46242
ID: 200405-20
- - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
Synopsis
========
Two MySQL utilities create temporary files with hardcoded paths,
allowing an attacker to use a symlink to trick MySQL into overwriting
important data.
Background
==========
MySQL is a popular open-source multi-threaded, multi-user SQL database
server.
Affected packages
=================
-------------------------------------------------------------------
Package / Vulnerable / Unaffected
-------------------------------------------------------------------
1 dev-db/mysql < 4.0.18-r2 >= 4.0.18-r2
Description
===========
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-N
pointing to a protected file, such as /etc/passwd, such that when
mysqlbug creates the Nth 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.
Impact
======
Since mysql_multi runs as root, a local attacker could use this to
destroy any other users' data or corrupt and destroy system files.
Workaround
==========
One could modify both scripts to log to a directory that users do not
have write permission to, such as /var/log/mysql/.
Resolution
==========
All users should upgrade to the latest stable version of MySQL.
# emerge sync
# emerge -pv ">=dev-db/mysql-4.0.18-r2"
# emerge ">=dev-db/mysql-4.0.18-r2"
References
==========
[ 1 ] CAN-2004-0381
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0381
[ 2 ] CAN-2004-0388
http://cve.mitre.org/cgi-bin/cvename.cgi?name=CAN-2004-0388
Availability
============
This GLSA and any updates to it are available for viewing at
the Gentoo Security Website:
http://security.gentoo.org/glsa/glsa-200405-20.xml
Concerns?
=========
Security is a primary focus of Gentoo Linux and ensuring the
confidentiality and security of our users machines is of utmost
importance to us. Any security concerns should be addressed to
security@gentoo.org or alternatively, you may file a bug at
http://bugs.gentoo.org.
License
=======
Copyright 2004 Gentoo Technologies, Inc; referenced text
belongs to its owner(s).
The contents of this document are licensed under the
Creative Commons - Attribution / Share Alike license.
http://creativecommons.org/licenses/by-sa/1.0
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.2.4 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org
iD8DBQFAs7DVvcL1obalX08RArIlAJ44WS5mZ6JVO+WFz2zNh+gVyRJYsQCdEDdq
O9uEFUw2mEPAt3dFqKsRnbk=
=cYDI
-----END PGP SIGNATURE-----
|
|
