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AUSCERT External Security Bulletin Redistribution
ESB-2019.4395
Cisco WebEx Centers Username Enumeration Information
Disclosure Vulnerability
21 November 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco WebEx Centers
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-15987
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20191120-webex-centers-infodis
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco WebEx Centers Username Enumeration Information Disclosure Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20191120-webex-centers-infodis
First Published: 2019 November 20 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvq81213
CSCvq81230
CVE-2019-15987
CWE-287
CVSS Score:
5.3 AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N/E:X/RL:X/RC:X
Summary
o A vulnerability in web interface of the Cisco Webex Event Center, Cisco
Webex Meeting Center, Cisco Webex Support Center, and Cisco Webex Training
Center could allow an unauthenticated, remote attacker to guess account
usernames.
The vulnerability is due to missing CAPTCHA protection in certain URLs. An
attacker could exploit this vulnerability by sending a crafted request to
the web interface. A successful exploit could allow the attacker to know if
a given username is valid and find the real name of the user.
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-20191120-webex-centers-infodis
Affected Products
o Vulnerable Products
This vulnerability affects the Cisco Webex Event Center, Cisco Webex
Meeting Center, Cisco Webex Support Center, and Cisco Webex Training
Center, which are cloud based.
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
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 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.
Fixed Releases
Cisco has addressed this vulnerability in Cisco Webex Event Center, Cisco
Webex Meeting Center, Cisco Webex Support Center, and Cisco Webex Training
Center, which are cloud based. No user action is required. Customers can
determine the current remediation status or software version by using the
Help function in the service GUI.
Customers who need additional information are advised to contact the Cisco
Technical Assistance Center (TAC) or their contracted maintenance
providers.
See the Details section in the bug ID(s) at the top of this advisory for
the most complete and current information.
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 Yakov Shafranovich and Pankaj Upadhyay of T. Rowe
Price Associates, Inc. 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-20191120-webex-centers-infodis
Revision History
o +---------+-------------------------+---------+--------+------------------+
| Version | Description | Section | Status | Date |
+---------+-------------------------+---------+--------+------------------+
| 1.0 | Initial public release. | - | Final | 2019-November-20 |
+---------+-------------------------+---------+--------+------------------+
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