Two vulnerabilities have been discovered in Pluck, which can be exploited by malicious people to conduct cross-site request forgery attacks and compromise a vulnerable system.
1) The application allows users to perform certain actions via HTTP requests without performing any validity checks to verify the requests. This can be exploited to e.g. upload a malicious PHP script by tricking a logged in administrator into visiting a malicious web site.
2) Input passed via e.g. a reaction comment post is not properly sanitised in the "sanitize()" function (data/inc/functions.all.php) before being written to a PHP file. This can be exploited to inject and execute arbitrary PHP code.
Successful exploitation of this vulnerability requires that the blog module is installed (installed by default) and included in a page and the reactions functionality is enabled (enabled by default).
NOTE: Additionally, this vulnerability can be exploited via cross-site request forgery attacks when the blog module is installed (installed by default).
The vulnerabilities are confirmed in version 4.7. Other versions may also be affected.
Solution: No official solution is currently available.
Provided and/or discovered by: 1) Mario Gomes via Secunia. Independently discovered by Gordon Security.
2) Uranium235 within a Launchpad bug report.
Original Advisory: Mario Gomes:
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Subject: Pluck Cross-Site Request Forgery and PHP Code Injection Vulnerabilities
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