Bug: MySQL command-line client HTML injection vulnerability ( Ascii Version )

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MySQL command-line client HTML injection vulnerability

Published
Credit
Risk
2008.10.01
Thomas Henlich
Medium
CWE
CVE
Local
Remote
CWE-79
CVE-2008-4456
No
Yes

CVSS Base Score
Impact Subscore
Exploitability Subscore
2.6/10
2.9/10
4.9/10
Exploit range
Attack complexity
Authentication
Remote
High
No required
Confidentiality impact
Integrity impact
Availability impact
None
Partial
None

MYSQL COMMAND-LINE CLIENT HTML INJECTION VULNERABILITY

Thomas Henlich <thomas_at_henlich&#46;de>

DESCRIPTION

The mysql command-line client does not quote HTML special characters
like < in its output. This allows an attacker who is able to write data
into a table to hide or modify records in the output, and to inject
potentially dangerous code, e. g. Javascript to perform cross-site
scripting or cross-site request forgery attacks.

HOW TO REPRODUCE

$ mysql --html --execute "select '<a>'" ...
<TABLE
BORDER=1><TR><TH><a></TH></TR><TR><TD><a></TD></TR></T
ABLE>

AFFECTED VERSIONS

All.

RESOLUTION

Users are advised to install the available patch from
http://bugs.mysql.com/bug.php?id=27884.

WORKAROUND

If another resolution is not feasible, users are advised to modify their
SELECT statements to filter out the characters < and &:

SELECT REPLACE(REPLACE(...,'&','&amp;'),'<','<') AS ...;

This workaround is incompatible with the described resolution and should
be reversed after installation of the patch.

TIMELINE

2007-04-17 Opened bug on mysql.com
2008-05-01 Patch available

RESOURCES

The bug is filed on http://bugs.mysql.com/bug.php?id=27884.

This advisory is available from
http://www.henlich.de/it-security/mysql-command-line-client-html-injection-vulnerability.

References:

http://www.securityfocus.com/archive/1/archive/1/496877/100/0/threaded
http://www.securityfocus.com/archive/1/archive/1/496842/100/0/threaded
http://www.henlich.de/it-security/mysql-command-line-client-html-injection-vulnerability
http://secunia.com/advisories/32072
http://bugs.mysql.com/bug.php?id=27884

See this note in TXT Version

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