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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.0282 Cisco Webex Meetings Suite and Cisco Webex Meetings Online Unauthenticated Meeting Join Vulnerability 28 January 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Webex Meetings Publisher: Cisco Systems Operating System: Cisco Impact/Access: Access Confidential Data -- Remote/Unauthenticated Resolution: None CVE Names: CVE-2020-3142 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200124-webex-unauthjoin - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Webex Meetings Suite and Cisco Webex Meetings Online Unauthenticated Meeting Join Vulnerability Priority: 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 availableCisco Bug IDs: CSCvs69110 CVE-2020-3142 CWE-284 CVSS Score: 7.5 AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:X/RL:X/RC:X Summary o [CVE-2020-3142_su] 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 [/CVE-2020-3142_su] Affected Products o Vulnerable Products [CVE-2020-3142_vp] This vulnerability affects Cisco Webex Meetings Suite sites and Cisco Webex Meetings Online sites releases earlier than 39.11.5 and 40.1.3. [/CVE-2020-3142_vp] Products Confirmed Not Vulnerable [CVE-2020-3142_nv] 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. [/CVE-2020-3142_nv] Details o 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 o [CVE-2020-3142_wa] There are no workarounds that address this vulnerability. [/CVE-2020-3142_wa] Fixed Software o 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 o [CVE-2020-3142_ex] 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. [/CVE-2020-3142_ex] Source o [CVE-2020-3142_vs] This vulnerability was found during the resolution of a Cisco TAC support case. [/CVE-2020-3142_vs] Cisco Security Vulnerability Policy o 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 o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/ cisco-sa-20200124-webex-unauthjoin Revision History o +---------+--------------------------+---------+--------+-----------------+ | Version | Description | Section | Status | Date | +---------+--------------------------+---------+--------+-----------------+ | | Corrected link | | | | | 1.1 | destination for visible | Summary | Final | 2020-January-24 | | | advisory URL in the | | | | | | Summary section. | | | | +---------+--------------------------+---------+--------+-----------------+ | 1.0 | Initial public release. | - | Final | 2020-January-24 | +---------+--------------------------+---------+--------+-----------------+ - --------------------------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: https://www.auscert.org.au/bulletins/ =========================================================================== 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). 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