Simple PHP Agenda 2.2.8 - 'edit_event.php?eventid' SQL Injection

EDB-ID:

26136




Platform:

PHP

Date:

2013-06-11


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=============================================
WEBERA ALERT ADVISORY 02
- Discovered by: Anthony Dubuissez
- Severity: high
- CVE Request – 05/06/2013
- CVE Assign – 06/06/2013
- CVE Number – CVE-2013-3961
- Vendor notification – 06/06/2013
- Vendor reply – 10/06/2013
- Public disclosure – 11/06/2013
=============================================

I. VULNERABILITY ————————-
iSQL in php-agenda <= 2.2.8

II. BACKGROUND ————————-
Simple Php Agenda is « a simple agenda tool written in PHP with MySQL backend. An agenda tool accessible everywere 
there’s internet ».

III. DESCRIPTION ————————-
Php-Agenda 2.2.8 and lower versions contain a flaw that allows an authenticated user iSQL attack. This flaw exists 
because the application does not properly sanitize parameters (only rely on mysql_real_escape_string() funcion ) in the 
edit_event.php file. This allows an attacker to create a specially crafted URL to dump multiple informations of the 
databases content.
A valid account is required.

IV. PROOF OF CONCEPT ————————-
dumping login and password of the first admin
iSQL: 
http://server/edit_event.php?eventid=1%20union%20select%201,2,3,username,password,6,7,8,9%20from%20users%20where%20userlevel=9%20limit%200,1

V. BUSINESS IMPACT ————————-
iSQL: We can get sensitive information with the vulnerabilities that can escalate to a complete administrator account.

VI. SYSTEMS AFFECTED ————————-
Php-Agenda 2.2.8 and lower versions

VII. SOLUTION ————————-
sanitize correctly the GET/POST parameter. (don’t rely on the mysql_real_escape_string() functions only…)

VIII. REFERENCES ————————-
http://www.webera.fr/advisory-02-php-agenda-isql-exploit/

IX. CREDITS ————————- 
the vulnerability has been discovered by Anthony Dubuissez (anthony (dot) dubuissez (at) webera (dot) fr).

X. DISCLOSURE TIMELINE ————————-
June 05, 2013: Vulnerability acquired by Webera
June 06, 2013: Sent to vendor.
June 10, 2013: Reply of vendor, vendor release bugfix in version 2.2.9
June 11, 2013: Advisory published and sent to lists.

XI. LEGAL NOTICES ————————-
The information contained within this advisory is supplied « as-is » with no warranties or guarantees of fitness of use 
or otherwise.Webera accepts no responsibility for any damage caused by the use or misuse of this information.

XII. FOLLOW US ————————-
You can follow Webera, news and security advisories at:
On twitter : @erathemass