Cisco Security Advisory
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CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:L/A:N/E:X/RL:X/RC:X
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A vulnerability in a URL parameter of Cisco WebEx could allow an unauthenticated, remote attacker to perform site redirection.
The vulnerability is due to insufficient input validation. An attacker could exploit this vulnerability by including a remote site URL in the affected parameter of the Cisco WebEx URL. An exploit could allow the attacker to redirect a user to a malicious website.
To exploit the vulnerability, the attacker may provide a link that directs a user to a malicious site and use misleading language or instructions to persuade the user to follow the provided link.
Cisco has released software updates that address this vulnerability. Workarounds that mitigate this vulnerability are available.
This advisory is available at the following link: https://sec.cloudapps.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20170118-wms4
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Currently, customers may contact WebEx Support to request that the Enforce BACKURL Domain Names selection be checked to disable redirection. In later releases, customers will be able to configure this functionality from the Administrator panel.
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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.
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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.
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This vulnerability was reported by Lawrence Amer.
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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.
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Show LessVersion Description Section Status Date 1.0 Initial public release. — Final 2017-January-18
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