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AUSCERT External Security Bulletin Redistribution
ESB-2021.0135
Cisco Webex Meetings Open Redirect Vulnerability
14 January 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Webex Meetings
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Provide Misleading Information -- Remote with User Interaction
Reduced Security -- Remote with User Interaction
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1310
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-open-redirect-PWvBQ2q
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Cisco Webex Meetings Open Redirect Vulnerability
Priority: Medium
Advisory ID: cisco-sa-webex-open-redirect-PWvBQ2q
First Published: 2021 January 13 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvv71287
CVE Names: CVE-2021-1310
CWEs: CWE-601
Summary
o A vulnerability in the web-based management interface of Cisco Webex
Meetings could allow an unauthenticated, remote attacker to redirect a user
to an untrusted web page, bypassing the warning mechanism that should
prompt the user before the redirection.
This vulnerability is due to improper input validation of the URL
parameters in an HTTP request. An attacker could exploit this vulnerability
by persuading a user to click a crafted link. A successful exploit could
allow the attacker to redirect a user to a malicious website, bypassing the
Webex URL check that should result in a warning before the redirection to
the web page. Attackers may use this type of vulnerability, known as an
open redirect attack, as part of a phishing attack to convince users to
unknowingly visit malicious sites.
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-webex-open-redirect-PWvBQ2q
Affected Products
o Vulnerable Products
This vulnerability affected all Cisco Webex Meetings sites prior to
November 24, 2020. Webex Meetings is cloud based.
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 addressed this vulnerability in Cisco Webex Meetings sites, which
are cloud based. No user action is required.
Customers who need additional information 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 Nabeel Ahmed and Tom Wyckhuys of NTT Belgium 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-webex-open-redirect-PWvBQ2q
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-JAN-13 |
+----------+---------------------------+----------+--------+--------------+
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