module

Sun Java Web Start Double Quote Injection

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Disclosed
2012-10-16
Created
2018-05-30

Description

This module exploits a flaw in the Web Start component of the Sun Java
Runtime Environment. Parameters initial-heap-size and max-heap-size in a JNLP
file can contain a double quote which is not properly sanitized when creating
the command line for javaw.exe. This allows the injection of the -XXaltjvm
option to load a jvm.dll from a remote UNC path into the java process. Thus
an attacker can execute arbitrary code in the context of a browser user.
This flaw was fixed in Oct. 2012 and affects JRE
In order for this module to work, it must be run as root on a server that
does not serve SMB (In most cases, this means non-Windows hosts). Additionally,
the target host must have the WebClient service (WebDAV Mini-Redirector) enabled.
Alternatively, a UNC path containing a jvm.dll can be specified, bypassing
the Windows limitation for the Metasploit host.

Author

Rh0 rh0@z1p.biz

Platform

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/windows/browser/java_ws_double_quote
    msf exploit(java_ws_double_quote) > show targets
        ...targets...
    msf exploit(java_ws_double_quote) > set TARGET < target-id >
    msf exploit(java_ws_double_quote) > show options
        ...show and set options...
    msf exploit(java_ws_double_quote) > exploit
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