WordPress Photo Gallery 1.3.34 / 1.3.42 Path Traversal

Credit: Tom Adams
Risk: Medium
Local: No
Remote: Yes

Details ================ Software: Photo Gallery Version: 1.3.34,1.3.42 Homepage: https://wordpress.org/plugins/photo-gallery/ Advisory report: https://security.dxw.com/advisories/path-traversal-in-photo-gallery-may-allow-admins-to-read-most-files-on-the-filesystem/ CVE: Awaiting assignment CVSS: 4 (Medium; AV:N/AC:L/Au:S/C:P/I:N/A:N) Description ================ Path traversal in Photo Gallery may allow admins to read most files on the filesystem Vulnerability ================ The plugin contains a file manager component which allows broad access to the filesystem including deleting files, uploading files, and moving files. In this proof-of-concept weall be usingA pathA traversal to copy a configurationA file from /etc into a web-readable directory in order to allow the attacker to read secrets. Proof of concept ================ Visit:A http://localhost/wp-admin/admin.php?page=galleries_bwg Click Add new then Add Images Right-click on the file manager overlay, click Inspect, and use the dev tools to get the URL of this iframe RemoveA &extensions=jpg%2Cjpeg%2Cpng%2Cgif from the URL Append &dir=/../../../../../../etc/ to the URL Visit that URL Select the passwd fileA by clicking on it once Press the copy button in the toolbar Press the up button repeatedly until you arrive back at wp-content/uploads/photo-gallery Press the paste button VisitA http://localhost/wp-content/uploads/photo-gallery/passwdA to read the list of users The number of ../A you need to add to the URL will vary,A and the web serverA may be configured to only allowA reading files with certain extensions. Mitigations ================ Upgrade to version 1.3.43 or later. Disclosure policy ================ dxw believes in responsible disclosure. Your attention is drawn to our disclosure policy: https://security.dxw.com/disclosure/ Please contact us on security@dxw.com to acknowledge this report if you received it via a third party (for example, plugins@wordpress.org) as they generally cannot communicate with us on your behalf. This vulnerability will be published if we do not receive a response to this report with 14 days. Timeline ================ 2017-03-29: Discovered 2017-05-26: Reported toA support@web-dorado.com 2017-05-29:A Received reply saying it would be fixedA in 1.3.43 2017-05-30: Version 1.3.43 was released 2017-06-16: Advisory published Discovered by dxw: ================ Tom Adams Please visit security.dxw.com for more information.

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