04 May 2018
Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2018.1361 Cisco WebEx Recording Format Player Information Disclosure Vulnerability 4 May 2018 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco WebEx Recording Format Player Publisher: Cisco Systems Operating System: UNIX variants (UNIX, Linux, OSX) Windows Impact/Access: Access Confidential Data -- Remote/Unauthenticated Resolution: Patch/Upgrade CVE Names: CVE-2018-0288 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-webex-id - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco WebEx Recording Format Player Information Disclosure Vulnerability Medium Advisory ID: cisco-sa-20180502-webex-id First Published: 2018 May 2 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvh89107 CSCvh89113 CSCvh89132 CSCvh89107,CSCvh89113,CSCvh89132,CSCvh89142 CVE-2018-0288 CWE-200 CVSS Score: Base 5.3 CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:X/RC:X CVE-2018-0288 Summary o A vulnerability in Cisco WebEx Recording Format (WRF) Player could allow an unauthenticated, remote attacker to access sensitive data about the application. An attacker could exploit this vulnerability to gain information to conduct additional reconnaissance attacks. The vulnerability is due to a design flaw in Cisco WRF Player. An attacker could exploit this vulnerability by utilizing a maliciously crafted file that could bypass checks in the code and enable an attacker to read memory from outside the bounds of the mapped file. 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-20180502-webex-id Affected Products o Vulnerable Products This vulnerability affects Cisco WebEx Business Suite meeting sites, Cisco WebEx Meetings sites, and Cisco WebEx WRF players. For information about affected software releases, consult the Cisco bug ID(s) at the top of this advisory. To determine whether a Cisco WebEx Meetings site is running an affected version of the WebEx client build, users can log in to their Cisco WebEx Meetings site and go to Support > Downloads. The version of the WebEx client build will be displayed on the right side of the page under About Meeting Center. Alternatively, version information for the Cisco WebEx Meetings client can be accessed within the Cisco WebEx Meetings client. Version information for the Cisco WebEx Meetings client on Windows and Linux platforms can be viewed by choosing Help > About Cisco WebEx Meeting Center. Version information for the Cisco WebEx Meetings client on Mac platforms can be viewed by choosing Meeting Center > About Cisco WebEx Meeting Center. The Cisco WebEx software updates are cumulative in client builds. For example, if client build 30.32.16 is fixed, build 30.32.17 will contain updated software. Cisco WebEx site administrators have access to secondary version nomenclature, for example, T30 SP32 EP 16, which shows that the server is running client build 30.32.16. Note: Customers who do not receive automatic software updates may be running versions of Cisco WebEx that have reached end of software maintenance and should contact customer support. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Details o The Cisco WebEx Business Suite (WBS) meeting services are a hosted multimedia conferencing solution that is managed and maintained by Cisco WebEx. The WRF file format is used to store WebEx meeting recordings that have been recorded on a WebEx meeting site. The Cisco WebEx WRF Player is an application that is used to play back and edit WebEx WRF recording files (files with .wrf extensions). The Cisco WebEx WRF Player can be installed automatically when the user accesses a recording file that is hosted on a Cisco WebEx Meetings site (for stream playback mode). The Cisco WebEx WRF Player can also be installed manually after downloading the application from http:// www.webex.com/play-webex-recording.html for offline playback of recording files. The Cisco WebEx WRF Player is available for all Cisco WebEx Business Suite clients (WBS31 and WBS32) and Cisco WebEx Meetings clients. The vulnerability described in this advisory could allow an attacker to bypass checks in the code and enable the attacker to read memory from outside the bounds of the mapped file. To exploit this vulnerability, the player application would need to open a malicious WRF file. The vulnerability cannot be triggered by users who are attending a WebEx meeting. Workarounds o There are no workarounds that address this vulnerability. However, it is possible to remove all Cisco WebEx software completely from a system by using the Meeting Services Removal Tool (for Microsoft Windows) or Mac WebEx Meeting Application Uninstaller (for Apple Mac OS X), both of which are available for download from the Cisco Collaboration Help for Cisco Spark, WebEx, and Jabber article at https://collaborationhelp.cisco.com/ article/en-us/WBX000026396. Removal of the Cisco WebEx software from a Linux or UNIX-based system can be accomplished by following the steps in the Cisco Collaboration Help for Cisco Spark, WebEx, and Jabber article at https:// collaborationhelp.cisco.com/article/en-us/WBX28548. Fixed Software o 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 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 This vulnerability was reported to Cisco by an anonymous reporter. 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. Subscribe to Cisco Security Notifications o Subscribe URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180502-webex-id Revision History o +----------+-----------------------------+----------+---------+---------------+ | Version | Description | Section | Status | Date | +----------+-----------------------------+----------+---------+---------------+ | 1.0 | Initial public release. | -- | Final | 2018-May-02 | +----------+-----------------------------+----------+---------+---------------+ Legal Disclaimer o 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. 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. - --------------------------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 email@example.com 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: firstname.lastname@example.org 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 iQIUAwUBWuuqsIx+lLeg9Ub1AQiGrQ/3cB2DK0HOxhFtTCJNCFPNfB54RJFfAkFU ZJ7QJ6MlLeWKsCBwotYj9l6WURUDfAxLonFCCORwYyqkWiTVFeVQ/Zuin6j/K1NT FtvdGm2rWHyof3PEMVg8k0uMySyoFnR5LXkHm9LQSr6O1B8N2S+wUU2+P3Yj/MqX 33W5lpnMXJBLWeN+tIwjIXWGnkrJ9eg+TqzyHnLYUfV72iiPiDpD/S4yPuAqAdKD zqGOhfK6QqHfZV3Ko7XM13y8wnTGS88AurA/rkC3t5Rm8fzdaO+WTIB5c0Ux69st auzeW4mJL/ROOjLEhias9F5m2w5jDObUkEWgC0NEcsUNth4oYN2SsezSp+RGraOy p3KsdwrXRMP1GLCNXxwrx+EgX/i0iaLucJDYYIy/AsiCqA7Dns1kaEcNjeL9kPjD PoNtyItph6haWJ1EdNK8BTJdiMX3oBe1HABK4k/VQlC29wXQncVa6gmXyBqE0gE8 UfPC0+39ZqLu0VLO8EOyO+RY7GMTAhzmwvDlQZiTZ3q1BnrYWdq3mG9i/JktXVy1 aDJb45td5tK9d+UTzIYmCoWgBCCK8KX/+Ey5Tq+yFAU8Mlo+Zm+f4tTo+n1zy63R Ii774rpe/6Ag8sUDS0rdqxvxswFn3lhRItKH2/eenf0UtToG9XOkR1gWqHExUwy/ tNWaVOQCQw== =ZTwf -----END PGP SIGNATURE-----