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AUSCERT Security Bulletin
Multiple Security Vulnerabilities Identified in MySQL 5.1.x
13 May 2010
AusCERT Security Bulletin Summary
Product: MySQL 5.1.x
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Delete Arbitrary Files -- Existing Account
Denial of Service -- Remote/Unauthenticated
Read-only Data Access -- Existing Account
CVE Names: CVE-2010-1850 CVE-2010-1849 CVE-2010-1848
Member content until: Saturday, June 12 2010
MySQL have detailed a number of security vulnerabilities that are
to be corrected in the upcoming version 5.1.47.
The vendor has provided the following information regarding these
* Security Fix: The server failed to check the table name argument
of a COM_FIELD_LIST command packet for validity and compliance
to acceptable table name standards. This could be exploited to
bypass almost all forms of checks for privileges and table-level
grants by providing a specially crafted table name argument to
In MySQL 5.0 and above, this allowed an authenticated user with
SELECT privileges on one table to obtain the field definitions of
any table in all other databases and potentially of other MySQL
instances accessible from the server's file system.
Additionally, for MySQL version 5.1 and above, an authenticated
user with DELETE or SELECT privileges on one table could delete
or read content from any other table in all databases on this
server, and potentially of other MySQL instances accessible from
the server's file system. (Bug#53371, CVE-2010-1848)
* Security Fix: The server was susceptible to a buffer-overflow
attack due to a failure to perform bounds checking on the table
name argument of a COM_FIELD_LIST command packet. By sending long
data for the table name, a buffer is overflown, which could be
exploited by an authenticated user to inject malicious code.
* Security Fix: The server could be tricked into reading packets
indefinitely if it received a packet larger than the maximum
size of one packet. (Bug#50974, CVE-2010-1849)
These vulnerabilities will reportedly be corrected in MySQL 5.1.47.
At the time of this publication, this version was not yet available.
Until such a time as the new version is released, administrators
should ensure that queries to the MySQL database are properly
sanitised before they are executed and may wish to monitor their
MySQL logs for signs of malicious activity.
 Changes in MySQL 5.1.47 (Not yet released)
AusCERT has made every effort to ensure that the information contained
in this document is accurate. However, the decision to use the information
described is the responsibility of each user or organisation. The decision to
follow or act on information or advice contained in this security bulletin is
the responsibility of each user or organisation, and should be considered in
accordance with your organisation's site policies and procedures. AusCERT
takes no responsibility for consequences which may arise from following or
acting on information or advice contained in this security bulletin.
If you believe that your computer system has been compromised or attacked in
any way, we encourage you to let us know by completing the secure National IT
Incident Reporting Form at:
Australian Computer Emergency Response Team
The University of Queensland
Internet Email: email@example.com
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Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
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