Butor Portal before 1.0.27 is affected by a Path Traversal vulnerability leading to a pre-authentication arbitrary file download. Effectively, a remote anonymous user can download any file on servers running Butor Portal. WhiteLabelingServlet is responsible for this vulnerability. It does not properly sanitize user input on the theme t parameter before reusing it in a path. This path is then used without validation to fetch a file and return its raw content to the user via the /wl?t=../../...&h= substring followed by a filename.
The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.
| Link | Tags |
|---|---|
| https://bitbucket.org/account/user/butor-team/projects/PROJ | third party advisory |
| https://bitbucket.org/butor-team/portal/commits/cd7055d33e194fcf530100ee1d8d13aa9cde230b | third party advisory patch |
| https://bitbucket.org/butor-team/portal/src/cd7055d33e194fcf530100ee1d8d13aa9cde230b/src/main/java/com/butor/portal/web/servlet/WhiteLabelingServlet.java?at=master | third party advisory exploit |
| https://www.gosecure.net/blog/2019/09/30/butor-portal-arbitrary-file-download-vulnerability-cve-2019-13343 | third party advisory exploit |
| https://bitbucket.org/butor-team/portal/commits/all | third party advisory |