module

Zimbra Collaboration Autodiscover Servlet XXE and ProxyServlet SSRF

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Disclosed
03/13/2019
Created
04/22/2019

Description

This module exploits an XML external entity vulnerability and a
server side request forgery to get unauthenticated code execution
on Zimbra Collaboration Suite. The XML external entity vulnerability
in the Autodiscover Servlet is used to read a Zimbra configuration
file that contains an LDAP password for the 'zimbra' account. The
zimbra credentials are then used to get a user authentication cookie
with an AuthRequest message. Using the user cookie, a server side request
forgery in the Proxy Servlet is used to proxy an AuthRequest with
the 'zimbra' credentials to the admin port to retrieve an admin
cookie. After gaining an admin cookie the Client Upload servlet is
used to upload a JSP webshell that can be triggered from the web
server to get command execution on the host. The issues reportedly
affect Zimbra Collaboration Suite v8.5 to v8.7.11.

This module was tested with Zimbra Release 8.7.1.GA.1670.UBUNTU16.64
UBUNTU16_64 FOSS edition.

Authors

An TrinhKhanh Viet PhamJacob Robles

Platform

Linux

Architectures

java

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/linux/http/zimbra_xxe_rce
    msf /(e) > show actions
        ...actions...
    msf /(e) > set ACTION < action-name >
    msf /(e) > show options
        ...show and set options...
    msf /(e) > run
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