==================================================================== CERT-Renater Note d'Information No. 2020/VULN046 _____________________________________________________________________ DATE : 27/01/2020 HARDWARE PLATFORM(S): / OPERATING SYSTEM(S): Systems running Cisco Webex Meetings Suite, Cisco Webex Meetings Online versions prior to 39.11.5, 40.1.3. ===================================================================== https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200124-webex-unauthjoin _____________________________________________________________________ Cisco Webex Meetings Suite and Cisco Webex Meetings Online Unauthenticated Meeting Join Vulnerability High Advisory ID: cisco-sa-20200124-webex-unauthjoin First Published: 2020 January 24 16:00 GMT Last Updated: 2020 January 24 19:21 GMT Version 1.1: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvs69110 CVSS Score: Base 7.5 CVE-2020-3142 CWE-284 Summary A vulnerability in Cisco Webex Meetings Suite sites and Cisco Webex Meetings Online sites could allow an unauthenticated, remote attendee to join a password-protected meeting without providing the meeting password. The connection attempt must initiate from a Webex mobile application for either iOS or Android. The vulnerability is due to unintended meeting information exposure in a specific meeting join flow for mobile applications. An unauthorized attendee could exploit this vulnerability by accessing a known meeting ID or meeting URL from the mobile device’s web browser. The browser will then request to launch the device’s Webex mobile application. A successful exploit could allow the unauthorized attendee to join the password-protected meeting. The unauthorized attendee will be visible in the attendee list of the meeting as a mobile attendee. Cisco has applied updates that address this vulnerability and no user action is required. 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-20200124-webex-unauthjoin Affected Products Vulnerable Products This vulnerability affects Cisco Webex Meetings Suite sites and Cisco Webex Meetings Online sites releases earlier than 39.11.5 and 40.1.3. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Cisco has confirmed that Cisco Webex Meetings Server is not affected. Details Determine the Cisco Webex Meetings Suite or Cisco Webex Meetings Online Release To determine the current release on a Cisco Webex Meetings Suite site or Cisco Webex Meetings Online site, a user can perform the following steps: Log in to the Cisco Webex Meetings Suite site or Cisco Webex Meetings Online site. Navigate to Downloads on the left side of the page. Next to Version Information hover over the circled i. Check the value displayed next to Page version. Workarounds There are no workarounds that address this vulnerability. Fixed Software Cisco has addressed this vulnerability in Cisco Webex Meetings Suite sites and Cisco Webex Meetings sites, which are cloud based. No user action is required. The Details section of this advisory describes how to determine the current running release. Customers who need additional information are advised to contact the Cisco Technical Assistance Center (TAC) or their contracted maintenance provider. Fixed Releases Cisco fixed this vulnerability in page versions 39.11.5 and later and 40.1.3 and later for Cisco Webex Meetings Suite sites and Cisco Webex Meetings Online sites. These page versions apply to client versions T32, T33, T39, and T40. The fix applies to Cisco Webex Meetings Suite sites and Cisco Webex Meetings sites only. Customers are not required to update the Cisco Webex Meetings mobile application or the Cisco Webex Meetings desktop application. Exploitation and Public Announcements The Cisco Product Security Incident Response Team (PSIRT) is not aware of any public announcements of the vulnerability that is described in this advisory. Cisco PSIRT is aware of active use of the vulnerability that is described in this advisory. Source This vulnerability was found during the resolution of a Cisco TAC support case. URL https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200124-webex-unauthjoin Revision History Version Description Section Status Date 1.1 Corrected link destination for visible advisory URL in the Summary section. Summary Final 2020-January-24 1.0 Initial public release. — Final 2020-January-24 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. A standalone copy or paraphrase of the text of this document that omits the distribution URL is an uncontrolled copy and may lack important information or contain factual errors. The information in this document is intended for end users of Cisco products. ========================================================= + CERT-RENATER | tel : 01-53-94-20-44 + + 23/25 Rue Daviel | fax : 01-53-94-20-41 + + 75013 Paris | email:cert@support.renater.fr + =========================================================