Software: Advanced Access Manager
Advisory report: https://security.dxw.com/advisories/advanced-access-manager-allows-admin-users-to-write-arbitrary-text-to-arbitrary-locations-which-could-lead-to-arbitrary-code-execution-etc/
CVSS: 6.5 (Medium; AV:N/AC:L/Au:S/C:P/I:P/A:P)
Advanced Access Manager allows admin users to write arbitrary files and execute arbitrary php
Advanced Access Manager allows writing arbitrary content to arbitrary files. Depending on the server configuration this couldallow arbitrary code execution, overwriting core WordPress files and e.g. blankingwp-config.php. In other configurations this could lead to overwriting files in the uploads directory.
Proof of concept
Press “Save” (this creates the “aam_configpress” option)
Set “aam_configpress” to “test.php
Press “Save Changes
Visit http://localhost/wp-admin/admin.php?page=aam-configpress again
Enter “<?php phpinfo();” into the textarea (without the quotes)
Note that there is no restriction on using “../” in the “aam_configpress” option so depending on server configuration you could create files anywhere on the filesystem.
This attack could be scripted to allow upload of binary files, including executable files.
Upgrade to version 2.8.3 or later
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This vulnerability will be published if we do not receive a response to this report with 14 days.
2014-09-01: Reported to author via email
2014-09-02:Developer reported the issue fixed
2014-09-03: Advisory published
Discovered by dxw:
Please visit security.dxw.com for more information.