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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2020.2118 Cisco Webex Meetings and Cisco Webex Meetings Server Token Handling Unauthorized Access Vulnerability 18 June 2020 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Webex Meetings and Cisco Webex Meetings Server Publisher: Cisco Systems Operating System: Cisco Windows Apple iOS Android Impact/Access: Provide Misleading Information -- Remote/Unauthenticated Unauthorised Access -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2020-3361 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-token-zPvEjKN - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Webex Meetings and Cisco Webex Meetings Server Token Handling Unauthorized Access Vulnerability Priority: High Advisory ID: cisco-sa-webex-token-zPvEjKN First Published: 2020 June 17 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvu41048CSCvu43189 CVE-2020-3361 CWE-287 Summary o A vulnerability in Cisco Webex Meetings and Cisco Webex Meetings Server could allow an unauthenticated, remote attacker to gain unauthorized access to a vulnerable Webex site. The vulnerability is due to improper handling of authentication tokens by a vulnerable Webex site. An attacker could exploit this vulnerability by sending crafted requests to a vulnerable Cisco Webex Meetings or Cisco Webex Meetings Server site. If successful, the attacker could gain the privileges of another user within the affected Webex site. Cisco has released software updates that address this vulnerability. Customers on Cisco hosted Webex Meetings sites do not need to take any actions to receive this update. 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-webex-token-zPvEjKN Affected Products o Vulnerable Products This vulnerability affects the following versions of Cisco Webex Meetings sites and Cisco Webex Meetings Server: Cisco Webex Meetings sites releases WBS 39.5.25 and earlier, WBS 40.4.10 and earlier, or release WBS 40.6.0 Cisco Webex Meetings Server releases 4.0MR3 and earlier Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Previous versions of Cisco Webex Meetings Server, versions 2.8.x and 3.0.x, are not affected. Workarounds o There are no workarounds that address this vulnerability. Fixed Software o 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: https://www.cisco.com/c/en/us/products/ end-user-license-agreement.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: https://www.cisco.com/c /en/us/support/web/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 This vulnerability has been fixed in Cisco Webex Meetings. There is no action customers need to take to get the update for Cisco hosted Webex Meetings sites. This vulnerability has been fixed in Cisco Webex Meetings Server Release 4.0 MR3 Security Patch 1. Customers should apply the updated version of the software for on-premises sites. Exploitation and Public Announcements o 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 o Cisco would like to thank an anonymous external researcher for reporting this vulnerability. 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-webex-token-zPvEjKN Revision History o +----------+---------------------------+----------+--------+--------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+--------------+ | 1.0 | Initial public release. | - | Final | 2020-JUN-17 | +----------+---------------------------+----------+--------+--------------+ - --------------------------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). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: http://www.auscert.org.au/render.html?it=1967 iQIVAwUBXur9vuNLKJtyKPYoAQix8g//XCUlQfxtgP3dFexuzjuHE4ATTy5+IxaZ zMNg8FRdxt8WjHMuesm9r2trI3UcWFvvgUKs/u3dQ2PNaJCBWJ8a2IiRfU1C0+5F HQy1JcsWgdX+tvWXYqnstpRI889Za3LpJzFIl8A10oJv2SfZP2NSFCVlkgvDrchu dL/d3WAZkgrJ/WLqcP9G5MK74VZJYndQo7Pmo09IK095AtcziwwTMrFzzxHG3OHK 7jHNFr5EBmf2QmlQN05TSNDADx3fmfuneyYhKQe6u98uM9SJxrY8wWjy/6MXuDr0 Z9duLoFPOK1CSQ/ovxr6gRIvWRMhaw2iVLnEVWgovGQBolX5De+gcdIDNq5cs8J1 OcUS5g2rzTPNAMoaKx5rF3kBl4x6gemh+cvKr7CgyLk/LWFdfXFqEL4K3hxMTxw7 vvta7O+SmpiAE8MHWPGPMrDU552fxXyqs6zmFzhU4mNilNfWmmvXzWolPTTKzgQ8 K2fRAl3ID+YYehWf1X+PzBORf6QX5rZi9TIyg1L6WuKsXPhh7FaqL/9vn8qJkg8g 4yw/6jiG0GZmuAkipp5ixMSg3SA9IMoe6g+p5oxSBNwgrTiuWEGFm5qi5O2aoF9a VadYLPe8u6WcNZlbmmZyClY4qnhmiOGRn2MntXz2oEoa2P8WRMIcMgYa7ALnMP9l c4lsC6iqMg4= =99HB -----END PGP SIGNATURE-----