16 March 2017
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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.0688 Cisco WebEx Meetings Server XML External Entity Vulnerability 16 March 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco WebEx Meetings Server Publisher: Cisco Systems Operating System: Cisco Impact/Access: Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-3811 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-wms - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Security Advisory Cisco WebEx Meetings Server XML External Entity Vulnerability Medium Advisory ID: cisco-sa-20170315-wms First Published: 2017 March 15 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvc39165 CVE-2017-3811 CWE-20 CVSS Score: Base 6.5, Temporal 6.5 CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N/E:X/RL:X/RC:X CVE-2017-3811 CWE-20 Summary A vulnerability in Cisco WebEx Meetings Server could allow an authenticated, remote attacker to have read access to part of the information stored in the affected system. The vulnerability is due to improper handling of an XML External Entity (XXE) when parsing an XML file. An attacker could exploit this vulnerability by sending a crafted XML file to the affected system. A successful exploit could allow the attacker to have read access to part of the information stored in the affected system. There are no workarounds that address this vulnerability. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-wms Affected Products Vulnerable Products This vulnerability affects Cisco WebEx Meetings Server. For information about affected software releases, consult the Cisco bug ID(s) at the top of this advisory. Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by this vulnerability. Workarounds There are no workarounds that address this vulnerability. Fixed Software For information about fixed software releases, consult the Cisco bug ID(s) at the top of this advisory. When considering software upgrades, customers are advised to regularly consult the advisories for Cisco products, which are available from the Cisco Security Advisories and Alerts page, to determine exposure and a complete upgrade solution. In all cases, customers should ensure that the devices to be upgraded contain sufficient memory and confirm that current hardware and software configurations will continue to be supported properly by the new release. If the information is not clear, customers are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance providers. Exploitation and Public Announcements The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements or malicious use of the vulnerability that is described in this advisory. Source This vulnerability was reported to the Cisco PSIRT by Ali Ardic. Cisco Security Vulnerability Policy To learn about Cisco security vulnerability disclosure policies and publications, see the Security Vulnerability Policy. This document also contains instructions for obtaining fixed software and receiving security vulnerability information from Cisco. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170315-wms Revision History Version Description Section Status Date 1.0 Initial public release. Final 2017-March-15 Legal Disclaimer THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME. 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