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AUSCERT External Security Bulletin Redistribution
ESB-2020.1958
Cisco Unified Contact Center Express Improper API Authori
zation Vulnerability
4 June 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Unified Contact Center Express
Publisher: Cisco Systems
Operating System: Cisco
Impact/Access: Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2020-3267
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-uccx-api-auth-WSx4v7sB
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Cisco Unified Contact Center Express Improper API Authorization Vulnerability
Priority: Medium
Advisory ID: cisco-sa-uccx-api-auth-WSx4v7sB
First Published: 2020 June 3 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds available
Cisco Bug IDs: CSCvr12303
CVE-2020-3267
CWE-285
CVSS Score:
5.4 AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L/E:X/RL:X/RC:X
Summary
o A vulnerability in the API subsystem of Cisco Unified Contact Center
Express (Unified CCX) could allow an authenticated, remote attacker to
change the availability state of any agent.
The vulnerability is due to insufficient authorization enforcement on an
affected system. An attacker could exploit this vulnerability by
authenticating to an affected system with valid agent credentials and
performing a specific API call with crafted input. A successful exploit
could allow the attacker to change the availability state of an agent,
potentially causing a denial of service condition.
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-uccx-api-auth-WSx4v7sB
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected Cisco Unified CCX
software releases earlier than Release 12.5(1).
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
At the time of publication, Cisco Unified CCX software releases 12.5(1) 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 This vulnerability was found during the resolution of a Cisco TAC support
case.
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-uccx-api-auth-WSx4v7sB
Revision History
o +----------+---------------------------+----------+--------+--------------+
| Version | Description | Section | Status | Date |
+----------+---------------------------+----------+--------+--------------+
| 1.0 | Initial public release. | - | Final | 2020-JUN-03 |
+----------+---------------------------+----------+--------+--------------+
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