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AUSCERT External Security Bulletin Redistribution
ESB-2020.0277
Cisco Umbrella Roaming Client for Windows Install Vulnerability
28 January 2020
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AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Umbrella Roaming Client
Publisher: Cisco Systems
Operating System: Windows
Impact/Access: Execute Arbitrary Code/Commands -- Existing Account
Denial of Service -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2019-16000
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20200122-umbrella-msi-install
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Umbrella Roaming Client for Windows Install Vulnerability
Priority: Medium
Advisory ID: cisco-sa-20200122-umbrella-msi-install
First Published: 2020 January 22 16:00 GMT
Version 1.0: Final
Workarounds: No workarounds availableCisco Bug IDs: CSCvr39895
CVE-2019-16000
CWE-345
CVSS Score:
4.4 AV:L/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:N/E:X/RL:X/RC:X
Summary
o A vulnerability in the automatic update process of Cisco Umbrella Roaming
Client for Windows could allow an authenticated, local attacker to install
arbitrary, unapproved applications on a targeted device.
The vulnerability is due to insufficient verification of the Windows
Installer. An attacker could exploit this vulnerability by placing a file
in a specific location in the Windows file system. A successful exploit
could allow the attacker to bypass configured policy and install unapproved
applications.
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-20200122-umbrella-msi-install
Affected Products
o Vulnerable Products
At the time of publication, this vulnerability affected Cisco Umbrella
Roaming Client for Windows Release 2.2.238.
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 Umbrella Roaming Client for Windows
releases 2.2.356 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 Luke Vella 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-20200122-umbrella-msi-install
Revision History
o +---------+--------------------------+---------+--------+-----------------+
| Version | Description | Section | Status | Date |
+---------+--------------------------+---------+--------+-----------------+
| 1.0 | Initial public release. | - | Final | 2020-January-22 |
+---------+--------------------------+---------+--------+-----------------+
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