Two vulnerabilities and a security issue have been discovered in e107, which can be exploited by malicious users to conduct SQL injection attacks and by malicious people to compromise a vulnerable system.

1) Input passed via the "click_url" parameter to e107_admin/banner.php is not properly sanitised before being used in an SQL query. This can be exploited to manipulate SQL queries by injecting arbitrary SQL code.

Successful exploitation requires access to the administrative banner section.

2) Input passed via the "loginname" parameter to usersettings.php while updating user profiles is not properly sanitised before being used in SQL queries. This can be exploited to manipulate SQL queries by injecting arbitrary SQL code.

3) The application implements checks for "[php]" BBCodes in an insufficient manner. This can be exploited to pass "[php]" BBCode to the BBCode parser e.g. via the "toEmail()" method in e107_handlers/e_parse_class.php by sending a specially crafted POST request to contact.php.

Successful exploitation allows execution of arbitrary PHP code.

The vulnerabilities are confirmed in version 0.7.20. Other versions may also be affected.

Solution
Update to version 0.7.22, which fixes vulnerabilities #2 and #3. Vulnerability #1 is fixed in the SVN repository.

Provided and/or discovered by
1) High-Tech Bridge SA
2,3) Stefan Esser

Changelog
Further details available to Secunia VIM customers

Original Advisory
High-Tech Bridge SA:
http://www.htbridge.ch/advisory/multiple_vulnerabilities_in_e107.html

Stefan Esser:
http://php-security.org/2010/05/16/mops-2010-031-e107-usersettings-loginname-sql-injection-vulnerability/index.html
http://php-security.org/2010/05/19/mops-2010-035-e107-bbcode-remote-php-code-execution-vulnerability/index.html

Deep Links
Links available to Secunia VIM customers