Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2017.1187 Cisco WebEx Meetings Server Information Disclosure Vulnerability 11 May 2017 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco WebEx Meetings Server Publisher: Cisco Systems Operating System: Cisco VMware ESX Server Impact/Access: Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2017-6651 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170510-cwms - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco WebEx Meetings Server Information Disclosure Vulnerability High Advisory ID: cisco-sa-20170510-cwms First Published: 2017 May 10 16:00 GMT Version 1.0: Final Workarounds: Yes Cisco Bug IDs: CSCve25950 CVSS Score: Base 7.5, Temporal 7.5 CVE-2017-6651 CWE-200 Summary A vulnerability in Cisco WebEx Meetings Server could allow unauthenticated, remote attackers to gain information that could allow them to access scheduled customer meetings. The vulnerability is due to an incomplete configuration of the robots.txt file on customer-hosted WebEx solutions and occurs when the Short URL functionality is not activated. All releases of Cisco WebEx Meetings Server later than release 2.5MR4 provide this functionality. An attacker could exploit this vulnerability via an exposed parameter to search for indexed meeting information. A successful exploit could allow the attacker to obtain scheduled meeting information and potentially allow the attacker to attend scheduled, customer meetings. Cisco has released software updates that address this vulnerability. Workarounds are available to address this vulnerability. This advisory is available at the following link:https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170510-cwms Affected Products Vulnerable Products This vulnerability affects the following releases of Cisco WebEx Meetings Server: 2.5 2.6 2.7 2.8 Products Confirmed Not Vulnerable No other Cisco products are currently known to be affected by this vulnerability. Cisco has confirmed that this vulnerability does not affect the following Cisco-hosted WebEx products: Cisco WebEx Meeting Center Cisco WebEx Training Center Cisco WebEx Event Center Cisco WebEx Support Center Cisco WebEx Meetings Workarounds Customers can enable the Short URL functionality for their individual releases by following the steps in the guide for the appropriate release detailed in the following list. Note: Customers are recommended to configure the block long URL links option below the Short URL function. Once the block long URL links functionality is activated, all previously scheduled meetings become invalid. Customers must reschedule all existing recurring meetings. It is also recommended that customers change their meeting passwords when rescheduling for added security protections. Guides for Enabling Short URL Functionality Administration Guide for Release 2.5 Administration Guide for Release 2.6 Administration Guide for Release 2.7 Administration Guide for Release 2.8 Fixed Software Cisco has released free software updates that address the vulnerability described in this advisory. Customers may only install and expect support for software versions and feature sets for which they have purchased a license. By installing, downloading, accessing, or otherwise using such software upgrades, customers agree to follow the terms of the Cisco software license:http://www.cisco.com/en/US/docs/general/warranty/English/EU1KEN_.html Additionally, customers may only download software for which they have a valid license, procured from Cisco directly, or through a Cisco authorized reseller or partner. In most cases this will be a maintenance upgrade to software that was previously purchased. Free security software updates do not entitle customers to a new software license, additional software feature sets, or major revision upgrades. 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. Customers Without Service Contracts Customers who purchase directly from Cisco but do not hold a Cisco service contract and customers who make purchases through third-party vendors but are unsuccessful in obtaining fixed software through their point of sale should obtain upgrades by contacting the Cisco TAC:http://www.cisco.com/en/US/support/tsd_cisco_worldwide_contacts.html Customers should have the product serial number available and be prepared to provide the URL of this advisory as evidence of entitlement to a free upgrade. Fixed Releases Cisco WebEx Meetings Server software can be downloaded from the Download Software site by navigating to Products > Conferencing > Web Conferencing > WebEx Meetings Server. Cisco WebEx First Fixed Release Meetings Server for this Vulnerability 2.5 2.5 MR6 Patch 6 2.6 2.6 MR3 Security Patch 4 2.7 2.7 MR2 Security Patch 6 2.8 2.8 Security Patch 1 Note: After the patch is applied, customers are recommended to enable the block long URL links option, which will invalidate previously scheduled recurring meeting links. Should customers choose to not enable the block long URL links option, previously scheduled meetings will continue to be available for use. Cisco PSIRT recommends that when rescheduling meetings, customers change previously used passwords or utilize a password generator to create new meeting passwords. 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 Cisco by Mohammed Adel. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170510-cwms Revision History Version Description Section Status Date 1.0 Initial public release. - Final 2017-May-10 - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. The decision to follow or act on information or advice contained in this security bulletin is the responsibility of each user or organisation, and should be considered in accordance with your organisation's site policies and procedures. AusCERT takes no responsibility for consequences which may arise from following or acting on information or advice contained in this security bulletin. NOTE: This is only the original release of the security bulletin. It may not be updated when updates to the original are made. If downloading at a later date, it is recommended that the bulletin is retrieved directly from the author's website to ensure that the information is still current. Contact information for the authors of the original document is included in the Security Bulletin above. If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: http://www.auscert.org.au/render.html?cid=1980 =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBWRPZSox+lLeg9Ub1AQjmYw/+Lhwla7pdekw8W7MAQqjIC76n0EXEX6fO Ggkdab7TxoE7PVX2rko5tko7EkpUaKw9RERQV6fs12eKZaJNnsNMEmNZDbogmUDg Gg7Gv7r5JX8uZXS3eui6OjW5MbQ6dBf7uO2ilZYCItUZaK4xpkLOoaTD8Zwj7TMS QbdcbClOCj0GhYkjwvMrUSDSyVPDW3PRpMSXSadkdSarg6Q6fRcJSXaaPlJSBsS+ H81uOgDx39+LvIJ4IaAqgkev6iUyEsguRoyhVeKmsUJbYu5xbcTfWIyy84CqPnK/ HN5YvW24VSDHbXYQakdIDAVbSXzVa2l7r+osBQHy1K8D/D+gJakaow0YfHb0TgyD hbbTjQ64Hiqz4Tj8yABOffBaGKyYzgV1pDlKCTUoPZvkEaP5csVk+RBN3x3P2Tz+ zomeB/N4ZQx7RZf2FvNXi6A8rAmKDTzHcPH9yLATUUOM9kcb+cDUls6oxZTxzmDS Cok2VfMBIuezodVleKWjszrPn7v4z0ks9X+l+XJq4GtFISdtKMbZfKuwLqfEM08R uEZLiLkyhPqShbMBifgL6rrq7XSKREmFveKUTa9/hW9s1rAjbePbDMhqZip71Q7F 9aq7Sb0H3HGQv3rpP2kqfqKF/Qh5fhFe7AeUTxgOTOhmLF/YXw984mx0MLXHgfxB MMavXBq5hJA= =ZBwG -----END PGP SIGNATURE-----