Cisco Security Advisory
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AV:N/AC:L/Au:N/C:P/I:N/A:N/E:F/RL:U/RC:C
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A vulnerability in the training registration page in Cisco WebEx Training Center could allow an unauthenticated, remote attacker to enumerate email addresses of registered attendees.
The vulnerability is due to registration error messages that allow a user to determine that an email address supplied during registration has already been specified by another registered attendee. An attacker could exploit this vulnerability by submitting multiple registration requests and viewing the resulting error messages to determine which email addresses have been submitted by other registered attendees.
Cisco has confirmed the vulnerability in a security notice; however, software updates are not available.
To exploit this vulnerability, it is likely that an attacker would need access to trusted, internal networks in which the targeted device may reside, to submit registration request and also view the error messages. This access requirement reduces the possibility of a successful exploit.
Cisco indicates through the CVSS score that functional exploit code exists; however, the code is not known to be publicly available.
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Customers are advised to consult Cisco bug ID CSCul36003 for the most complete list of affected product versions.
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Administrators are advised to contact the vendor regarding future updates and releases.
Administrators are advised to allow only trusted users to have network access.
Administrators may consider using IP-based access control lists (ACLs) to allow only trusted systems to access the affected systems.
Administrators are advised to monitor affected systems.
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Software updates are not available.
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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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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 Release NA Final 2013-Dec-13
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