3aa17c7443
Summary: We don't currently validate CSRF tokens on this workflow. This allows an attacker to upload arbitrary files on the user's behalf. Although I believe the tight list of servable mime-types means that's more or less the end of the attack, this is still a vulnerability. In the long term, the right solution is probably to pass CSRF tokens on all Ajax requests in an HTTP header (or just a GET param) or something like that. However, this endpoint is unique and this is the quickest and most direct way to close the hole. Test Plan: - Drop-uploaded files to Files, Maniphest, Phriction and Differential. - Modified CSRF vaidator to use __csrf__.'x' and verified uploads and form submissions don't work. Reviewers: andrewjcg, aran, jungejason, tuomaspelkonen, erling Commenters: andrewjcg, pedram CC: aran, epriestley, andrewjcg, pedram Differential Revision: 758
Phabricator is a open source collection of web applications which make it easier to write, review, and share source code. Phabricator was developed at Facebook. This is an early release. It's pretty high-quality and usable, but under active development so things may change quickly. You can learn more about the project and find links to documentation and resources at: http://phabricator.org/ LICENSE Phabricator is released under the Apache 2.0 license except as otherwise noted. http://www.apache.org/licenses/LICENSE-2.0