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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2019.0213 Cisco Webex Multiple Vulnerabilities 24 January 2019 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Cisco Webex Publisher: Cisco Systems Operating System: Windows Linux variants Cisco Mac OS Impact/Access: Execute Arbitrary Code/Commands -- Existing Account Cross-site Scripting -- Existing Account Resolution: Patch/Upgrade CVE Names: CVE-2019-1655 CVE-2019-1641 CVE-2019-1640 CVE-2019-1639 CVE-2019-1638 CVE-2019-1637 CVE-2019-1636 Original Bulletin: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-webex-teams https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-webex-rce https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-meetings-xss Comment: This bulletin contains three (3) advisories. - --------------------------BEGIN INCLUDED TEXT-------------------- Cisco Webex Teams URI Handler Insecure Library Loading Vulnerability Priority: High Advisory ID: cisco-sa-20190123-webex-teams First Published: 2019 January 23 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvn02053 CVE-2019-1636 CWE-78 CVSS Score: 7.8 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X Summary o A vulnerability in the Cisco Webex Teams client, formerly Cisco Spark, could allow an attacker to execute arbitrary commands on a targeted system. This vulnerability is due to unsafe search paths used by the application URI that is defined in Windows operating systems. An attacker could exploit this vulnerability by convincing a targeted user to follow a malicious link. Successful exploitation could cause the application to load libraries from the directory targeted by the URI link. The attacker could use this behavior to execute arbitrary commands on the system with the privileges of the targeted user if the attacker can place a crafted library in a directory that is accessible to the vulnerable system. Cisco has released software updates that address this vulnerability. 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-20190123-webex-teams Affected Products o Vulnerable Products This vulnerability affects all versions of Cisco Webex Teams prior to version 3.0.10260, which was released on November 21, 2018. To determine which Cisco Webex Teams version is running, users can click their profile picture, which is between the Home icon and search field in the application window. The user can choose Help > About to view the version information, which is similar to the following: Webex Teams Version: 3.0.10260.0 Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. 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 Cisco Webex Teams versions 3.0.10260 (released on November 21, 2018) and later contain the fix for this vulnerability. Customers are advised to upgrade to the latest version of Cisco Webex Teams. In the left panel of the app, click the Refresh icon (the circular green arrow) and then click Update. If the Refresh icon is not present, there is no update pending. For more information, see the Cisco Webex Teams help article Update the Cisco Webex Teams App to the Latest Release. 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 rgod of 9sg Security Team, working with Trend Micro's Zero Day Initiative, for reporting the 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. Subscribe to Cisco Security Notifications o Subscribe URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-webex-teams Revision History o +----------+---------------------------+----------+--------+------------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+------------------+ | 1.0 | Initial public release. | | Final | 2019-January-23 | +----------+---------------------------+----------+--------+------------------+ - -------------------------------------------------------------------------------- Cisco Webex Network Recording Player Arbitrary Code Execution Vulnerabilities Priority: High Advisory ID: cisco-sa-20190123-webex-rce First Published: 2019 January 23 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvm65148 CSCvm65207 CSCvm65741 CSCvm65747 CSCvm65794 CSCvm65798 CSCvm86137 CSCvm86143 CSCvm86148 CSCvm86157 CSCvm86160 CSCvm86165 CVE-2019-1637 CVE-2019-1638 CVE-2019-1639 CVE-2019-1640 CVE-2019-1641 CWE-119 CVSS Score: 7.8 AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X Summary o Multiple vulnerabilities in the Cisco Webex Network Recording Player for Microsoft Windows and the Cisco Webex Player for Microsoft Windows could allow an attacker to execute arbitrary code on an affected system. The vulnerabilities exist because the affected software improperly validates Advanced Recording Format (ARF) and Webex Recording Format (WRF) files. An attacker could exploit these vulnerabilities by sending a user a malicious ARF or WRF file via a link or email attachment and persuading the user to open the file with the affected software. A successful exploit could allow the attacker to execute arbitrary code on the affected system. Cisco has released software updates that address these vulnerabilities. There are no workarounds that address these vulnerabilities. This advisory is available at the following link: https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-webex-rce Affected Products o Vulnerable Products These vulnerabilities affect the following versions of the Cisco Webex Network Recording Player for Microsoft Windows and the Cisco Webex Player for Microsoft Windows, which are available from Cisco Webex Business Suite sites, Cisco Webex Meetings Online sites, and Cisco Webex Meetings Server: Cisco Webex Business Suite WBS32 sites -- All Webex Network Recording Player and Webex Player versions prior to Version WBS32.15.33 Cisco Webex Business Suite WBS33 sites -- All Webex Network Recording Player and Webex Player versions prior to Version WBS33.6.1 or WBS 33.7.0 Cisco Webex Meetings Online -- All Webex Network Recording Player and Webex Player versions prior to Version 1.3.40 Cisco Webex Meetings Server -- All Webex Network Recording Player versions prior to Version 2.8MR3 SecurityPatch1 or 3.0MR2 SecurityPatch2 To determine which version of the Cisco Webex Network Recording Player or the Cisco Webex Player is installed on a system, users can open the player and choose Help > About. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by these vulnerabilities. Cisco Webex Network Recording Player for Mac OS is not affected. Details o Cisco Webex Business Suite services and Cisco Webex Meetings Online are hosted, multimedia conferencing solutions that are managed and maintained by Cisco Webex. Cisco Webex Meetings Server is a multimedia conferencing solution that customers host, manage, and maintain in their private clouds. Cisco Webex Business Suite services can be configured to allow users to store meeting recordings online and download those recordings as ARF files. These services can also be configured to allow users to record meetings directly on their local computers as WRF files. The Cisco Webex Network Recording Player is the application that is used to play back ARF files. It is available from Cisco Webex Business Suite sites (WBS31, WBS32, and WBS33), Cisco Webex Meetings Online, and Cisco Webex Meetings Server. The player can be installed manually from the Cisco Webex website or automatically when a user accesses an ARF file for streaming playback from a Cisco Webex Business Suite site. The Cisco Webex Player is the application that is used to play back WRF files. It is available from Cisco Webex Business Suite sites (WBS31, WBS32, and WBS33) and Cisco Webex Meetings Online. It is not available from Cisco Webex Meetings Server. The player can also be installed manually from the Cisco Webex website. Workarounds o There are no workarounds that address these vulnerabilities. However, customers may remove the Cisco Webex Network Recording Player and the Cisco Webex Player from a system by using the software-removal procedure for the operating system. For example, to remove a player from a Microsoft Windows 10 system, customers can use the Apps & Features app in Windows Settings. To remove all Cisco Webex software from a Microsoft Windows system, customers can use the Meeting Services Removal Tool, which is available for download from the Cisco Collaboration Help article, Cisco Webex and 3rd Party Support Utilities. By removing the Cisco Webex Network Recording Player, a user will be unable to play media. However, the next time media is accessed, the system will download a new version of the software, providing the user with an updated version. Fixed Software o Cisco has released free software updates that address the vulnerabilities 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 Version Information Cisco has fixed these vulnerabilities in the following versions of the Cisco Webex Network Recording Player and the Cisco Webex Player: Cisco Webex Business Suite WBS32 sites -- Webex Network Recording Player and Webex Player Versions WBS32.15.33 and later Cisco Webex Business Suite WBS33 sites -- Webex Network Recording Player and Webex Player Versions WBS33.6.1 and later Cisco Webex Meetings Online -- Webex Network Recording Player and Webex Player Versions 1.3.40 and later Cisco Webex Meetings Server -- Webex Network Recording Player Versions 2.8MR3 SecurityPatch1 or 3.0MR2 SecurityPatch2 and later Cisco has not and will not fix all these vulnerabilities in Cisco Webex Business Suite WBS31 sites because those sites have reached the end-of-version-support milestone. For information about this milestone and the upgrade plans for WBS31 sites, see Cisco Webex Meetings Suite End-of-Version Support Policy. Customers can upgrade to a fixed version of the Cisco Webex Network Recording Player in either of two ways: Automatically: The player will be automatically upgraded to the latest version of the software when a user accesses an ARF file that is hosted on a Cisco Webex Business Suite site (WBS32 or WBS33), Cisco Webex Meetings Online site, or Cisco Webex Meetings Server. Manually: The player can be downloaded and installed from https:// www.webex.com/play-webex-recording.html. Note: Customers who use locked-down Cisco Webex sites will not receive updated versions of the Cisco Webex Network Recording Player automatically. These customers should contact Cisco Webex Customer Support to obtain updates or the latest version of the player from https:// www.webex.com/play-webex-recording.html. Customers can upgrade to a fixed version of the Cisco Webex Player by uninstalling their current version of the player and then downloading and installing the latest version of the player from https://www.webex.com/ play-webex-recording.html. The following table lists the Cisco bug IDs and fixed versions of the software for each vulnerability that is described in this advisory. Customers are advised to upgrade to an appropriate version as indicated in the table. Fixed Versions Fixed Versions Webex Meetings Webex Meetings Webex Cisco Bug Suite Suite Meetings ID WBS32 Sites WBS33 Sites Webex Meetings Server Online CVE-2019-1637 CSCvm86148, 32.15.33 or 33.7.0 or later CSCvm86157 later CSCvm86137, 2.8MR3, 2.8MR3 CSCvm86160 SecurityPatch1, 3.0MR2 SecurityPatch2 CSCvm86143, 1.3.40 CSCvm86165 CVE-2019-1638 CSCvm65207 32.15.31 or 33.6.1 or later later 2.8MR3, 2.8MR3 CSCvm65747 SecurityPatch1, 3.0MR2 SecurityPatch2 CSCvm65741 1.3.39 CVE-2019-1639 CSCvm65148 32.15.31 or 33.6.1 or later later 2.8MR3, 2.8MR3 CSCvm65794 SecurityPatch1, 3.0MR2 SecurityPatch2 CSCvm65798 1.3.39 CVE-2019-1640 CSCvm97538 32.15.33 or 33.7.0 or later later 2.8MR3, 2.8MR3 CSCvm97540 SecurityPatch1, 3.0MR2 SecurityPatch2 CSCvm97541 1.3.39 CVE-2019-1641 CSCvm97484 32.15.33 or 33.7.0 or later later 2.8MR3, 2.8MR3 CSCvm97536 SecurityPatch1, 3.0MR2 SecurityPatch2 CSCvm97537 1.3.40 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 vulnerabilities that are described in this advisory. Source o Cisco would like to thank the Zero Day Initiative for reporting the following vulnerabilities: CVE-2019-1638 and CVE-2019-1639. Cisco would like to thank Kushal Arvind Shah and Yonghui Han of Fortinet for reporting the following vulnerabilities: CVE-2019-1637, CVE-2019-1640, and CVE-2019-1641. 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-20190123-webex-rce Revision History o +----------+---------------------------+----------+--------+------------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+------------------+ | 1.0 | Initial public release. | | Final | 2019-January-23 | +----------+---------------------------+----------+--------+------------------+ - -------------------------------------------------------------------------------- Cisco Webex Meetings Server Cross-Site Scripting Vulnerability Priority: Medium Advisory ID: cisco-sa-20190123-meetings-xss First Published: 2019 January 23 16:00 GMT Version 1.0: Final Workarounds: No workarounds available Cisco Bug IDs: CSCvn10993 CVE-2019-1655 CWE-79 CVSS Score: 6.1 AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N/E:X/RL:X/RC:X Summary o A vulnerability in the web-based management interface of Cisco Webex Meetings Server could allow an unauthenticated, remote attacker to conduct a cross-site scripting (XSS) attack against a user of the web-based interface of the affected software. The vulnerability is due to insufficient validation of user-supplied input by the affected software. An attacker could exploit this vulnerability by persuading a user of the interface to click a maliciously crafted link. A successful exploit could allow the attacker to execute arbitrary script code in the context of the affected interface or access sensitive, browser-based information. Cisco has released software updates that address this vulnerability. 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-20190123-meetings-xss Affected Products o Vulnerable Products This vulnerability affects Cisco Webex Meetings Server. For information about affected software releases, consult the Cisco bug ID(s) at the top of this advisory. Products Confirmed Not Vulnerable Only products listed in the Vulnerable Products section of this advisory are known to be affected by this vulnerability. Workarounds o There are no workarounds that address this vulnerability. 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 Cisco would like to thank Deniz CEVIK from Biznet Bilisim A.S 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. Subscribe to Cisco Security Notifications o Subscribe Action Links for This Advisory o Understanding Cross-Site Scripting (XSS) Threat Vectors Related to This Advisory o Cross-Site Scripting URL o https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20190123-meetings-xss Revision History o +----------+---------------------------+----------+--------+------------------+ | Version | Description | Section | Status | Date | +----------+---------------------------+----------+--------+------------------+ | 1.0 | Initial public release. | -- | Final | 2019-January-23 | +----------+---------------------------+----------+--------+------------------+ - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. 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