module
Firefox 5.0 - 15.0.1 __exposedProps__ XCS Code Execution
| Disclosed | Created |
|---|---|
| 08/06/2013 | 05/30/2018 |
Disclosed
08/06/2013
Created
05/30/2018
Description
On versions of Firefox from 5.0 to 15.0.1, the InstallTrigger global, when given
invalid input, would throw an exception that did not have an __exposedProps__
property set. By re-setting this property on the exception object's prototype,
the chrome-based defineProperty method is made available.
With the defineProperty method, functions belonging to window and document can be
overridden with a function that gets called from chrome-privileged context. From here,
another vulnerability in the crypto.generateCRMFRequest function is used to "peek"
into the context's private scope. Since the window does not have a chrome:// URL,
the insecure parts of Components.classes are not available, so instead the AddonManager
API is invoked to silently install a malicious plugin.
invalid input, would throw an exception that did not have an __exposedProps__
property set. By re-setting this property on the exception object's prototype,
the chrome-based defineProperty method is made available.
With the defineProperty method, functions belonging to window and document can be
overridden with a function that gets called from chrome-privileged context. From here,
another vulnerability in the crypto.generateCRMFRequest function is used to "peek"
into the context's private scope. Since the window does not have a chrome:// URL,
the insecure parts of Components.classes are not available, so instead the AddonManager
API is invoked to silently install a malicious plugin.
Authors
Mariusz Mlynskimoz_bug_r_a4joev
Platform
Java,Linux,OSX,Solaris,Windows
References
Module Options
To display the available options, load the module within the Metasploit console and run the commands ‘show options’ or ‘show advanced’:
msf > use exploit/multi/browser/firefox_proto_crmfrequest
msf /(t) > show actions
...actions...
msf /(t) > set ACTION < action-name >
msf /(t) > show options
...show and set options...
msf /(t) > run
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