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AUSCERT External Security Bulletin Redistribution
ESB-2021.0781
Cisco Webex Meetings Unauthorized Distribution List Update Vulnerability
4 March 2021
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Webex Meetings
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Modify Arbitrary Files -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2021-1410
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-webex-distupd-N87eB6Z3
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Webex Meetings Unauthorized Distribution List Update Vulnerability
Priority: Medium
Advisory ID: cisco-sa-webex-distupd-N87eB6Z3
First Published: 2021 March 3 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvw68608
CVE Names: CVE-2021-1410
CWEs: CWE-284
Summary
o A vulnerability in the distribution list feature of Cisco Webex Meetings
could allow an authenticated, remote attacker to modify a distribution list
that belongs to another user of their organization.
The vulnerability is due to insufficient authorization enforcement for
requests to update distribution lists. An attacker could exploit this
vulnerability by sending a crafted request to the Webex Meetings interface
to modify an existing distribution list. A successful exploit could allow
the attacker to modify a distribution list that belongs to a user other
than themselves.
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-distupd-N87eB6Z3
Affected Products
o Vulnerable Products
This vulnerability affects releases earlier than Release 41.2.0 of Cisco
Webex Meetings, which 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.
Cisco has confirmed that this vulnerability does not affect Cisco Webex
Meetings Server Software.
Workarounds
o There are no workarounds that address this vulnerability.
Fixed Software
o Cisco has addressed this vulnerability in Cisco Webex Meetings, which is
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.
Fixed Releases
At the time of publication, Cisco Webex Meetings releases 41.2.0 and later
contained the fix for this vulnerability.
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 Sai Kiran Battaluri and Chavda Zeel 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-distupd-N87eB6Z3
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2021-MAR-03 |
+----------+---------------------------+----------+--------+--------------+
- --------------------------END INCLUDED TEXT--------------------
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