Vigil@nce - WordPress Smush Image: directory traversal
December 2017 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer
SYNTHESIS OF THE VULNERABILITY
An attacker can traverse directories of WordPress Smush Image, in order to read a file outside the service root path.
Impacted products: WordPress Plugins not comprehensive.
Creation date: 05/10/2017.
DESCRIPTION OF THE VULNERABILITY
The Smush Image plugin can be installed on WordPress.
However, user’s data are directly inserted in an access path. Sequences such as "/.." can thus be used to go in the upper directory.
An attacker can therefore traverse directories of WordPress Smush Image, in order to read a file outside the service root path.
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