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AUSCERT External Security Bulletin Redistribution
ESB-2018.2668.2
Multiple vulnerabilities have been identified in Cisco Umbrella Enterprise
17 September 2018
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Cisco Umbrella Enterprise
Publisher: Cisco Systems
Operating System: Windows
OS X
Impact/Access: Increased Privileges -- Existing Account
Resolution: Patch/Upgrade
CVE Names: CVE-2018-0438
Original Bulletin:
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180905-umbrella-file-read
https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-20180905-umbrella-priv
Comment: This bulletin contains two (2) Cisco Systems security advisories.
Revision History: September 17 2018: Vendor updated sections on vulnerable
products and those not vulnerable
September 7 2018: Initial Release
- --------------------------BEGIN INCLUDED TEXT--------------------
Cisco Security Advisory
Cisco Umbrella Enterprise Roaming Client Privilege Escalation Vulnerability
Priority: High
Advisory ID: cisco-sa-20180905-umbrella-file-read
First Published: 2018 September 5 16:00 GMT
Last Updated: 2018 September 11 19:43 GMT
Version 1.1: Final
Workarounds: No workarounds available
Cisco Bug IDs:
CSCvj61288
CVE-2018-0438
CWE-20
CVSS Score:
Base 7.8
CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:X
Summary
A vulnerability in the Cisco Umbrella Enterprise Roaming Client (ERC) could
allow an authenticated, local attacker to elevate privileges to
Administrator. To exploit the vulnerability, the attacker must authenticate
with valid local user credentials.
This vulnerability is due to improper implementation of file system
permissions, which could allow non-administrative users to place files
within restricted directories. An attacker could exploit this vulnerability
by placing an executable file within the restricted directory, which when
executed by the ERC client, would run with Administrator privileges.
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-20180905-umbrella-file-read
Affected Products
* Vulnerable Products
This vulnerability affects Cisco Umbrella ERCs for Windows prior to Release
2.1.127.
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Cisco Umbrella ERCs for Mac are not impacted by this vulnerability.
Workarounds
* There are no workarounds that address this vulnerability.
Fixed Software
* Cisco has released free software updates that address the vulnerability
described in this advisory. Customers may only install and expect support
for software versions and feature sets for which they have purchased a
license. By installing, downloading, accessing, or otherwise using such
software upgrades, customers agree to follow the terms of the Cisco
software license:
https://www.cisco.com/c/en/us/products/end-user-license-agreement.html
Additionally, customers may only download software for which they have a
valid license, procured from Cisco directly, or through a Cisco authorized
reseller or partner. In most cases this will be a maintenance upgrade to
software that was previously purchased. Free security software updates do
not entitle customers to a new software license, additional software
feature sets, or major revision upgrades.
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.
Customers Without Service Contracts
Customers who purchase directly from Cisco but do not hold a Cisco service
contract and customers who make purchases through third-party vendors but
are unsuccessful in obtaining fixed software through their point of sale
should obtain upgrades by contacting the Cisco TAC:
https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html
Customers should have the product serial number available and be prepared
to provide the URL of this advisory as evidence of entitlement to a free
upgrade.
Fixed Releases
Cisco has addressed this vulnerability in Cisco Umbrella ERC releases
2.1.127 and later.
Exploitation and Public Announcements
* 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
* This vulnerability was found during internal security testing.
Cisco Security Vulnerability Policy
* 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
* https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180905-umbrella-file-read
Revision History
*
+-----------------------------------------------------------------------------+
| Version | Description | Section | Status | Date |
|---------+---------------------+----------------+--------+-------------------|
| | Updated the | Vulnerable | | |
| | Vulnerable Products | Products, | | |
| 1.1 | and Products | Products | Final | 2018-September-11 |
| | Confirmed Not | Confirmed Not | | |
| | Vulnerable | Vulnerable | | |
| | sections. | | | |
|---------+---------------------+----------------+--------+-------------------|
| 1.0 | Initial public | ? | Final | 2018-September-05 |
| | release. | | | |
+-----------------------------------------------------------------------------+
Legal Disclaimer
* THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information
or contain factual errors. The information in this document is intended for
end users of Cisco products.
Cisco Security Vulnerability Policy
* 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.
- --------------------------------------------------------------------------------
Cisco Security Advisory
Cisco Umbrella Enterprise Roaming Client and Enterprise Roaming Module
Privilege Escalation Vulnerability
Priority: High
Advisory ID: cisco-sa-20180905-umbrella-priv
First Published: 2018 September 5 16:00 GMT
Last Updated: 2018 September 11 19:44 GMT
Version 1.1: Final
Workarounds: No workarounds available
Cisco Bug IDs:
CSCvj46275
CSCvj48400
CVE-2018-0437
CWE-264
CVSS Score:
Base 7.8
CVSS:3.0/AV:L/AC:H/PR:L/UI:N/S:C/C:H/I:H/A:H/E:X/RL:X/RC:X
CVE-2018-0437
Summary
A vulnerability in the Cisco Umbrella Enterprise Roaming Client (ERC) could
allow an authenticated, local attacker to elevate privileges to
Administrator. To exploit the vulnerability, the attacker must authenticate
with valid local user credentials.
This vulnerability is due to improper implementation of file system
permissions, which could allow non-administrative users to place files
within restricted directories. An attacker could exploit this vulnerability
by placing an executable file within the restricted directory, which when
executed by the ERC client, would run with Administrator privileges.
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-20180905-umbrella-priv
Affected Products
* Vulnerable Products
This vulnerability affects Cisco Umbrella ERCs for Windows prior to Release
2.1.118 and Cisco Umbrella Roaming Module releases prior to 4.6.1098
Products Confirmed Not Vulnerable
Only products listed in the Vulnerable Products section of this advisory
are known to be affected by this vulnerability.
Cisco Umbrella ERCs for Mac are not impacted by this vulnerability.
Workarounds
* There are no workarounds that address this vulnerability.
Fixed Software
* Cisco has released free software updates that address the vulnerability
described in this advisory. Customers may only install and expect support
for software versions and feature sets for which they have purchased a
license. By installing, downloading, accessing, or otherwise using such
software upgrades, customers agree to follow the terms of the Cisco
software license:
https://www.cisco.com/c/en/us/products/end-user-license-agreement.html
Additionally, customers may only download software for which they have a
valid license, procured from Cisco directly, or through a Cisco authorized
reseller or partner. In most cases this will be a maintenance upgrade to
software that was previously purchased. Free security software updates do
not entitle customers to a new software license, additional software
feature sets, or major revision upgrades.
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.
Customers Without Service Contracts
Customers who purchase directly from Cisco but do not hold a Cisco service
contract and customers who make purchases through third-party vendors but
are unsuccessful in obtaining fixed software through their point of sale
should obtain upgrades by contacting the Cisco TAC:
https://www.cisco.com/c/en/us/support/web/tsd-cisco-worldwide-contacts.html
Customers should have the product serial number available and be prepared
to provide the URL of this advisory as evidence of entitlement to a free
upgrade.
Fixed Releases
Cisco Umbrella ERC releases 2.1.118 and later address the vulnerability
described in this advisory.
Cisco Umbrella Roaming Module for Cisco AnyConnect releases 4.6.1098 and
later address the vulnerability described in this advisory.
Exploitation and Public Announcements
* 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
* This vulnerability was reported to Cisco by Quentin Rhoads at Critical
Start.
Cisco Security Vulnerability Policy
* 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
* https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/
cisco-sa-20180905-umbrella-priv
Revision History
*
+-----------------------------------------------------------------------------+
| Version | Description | Section | Status | Date |
|---------+---------------------+----------------+--------+-------------------|
| | Updated the | Vulnerable | | |
| | Vulnerable Products | Products, | | |
| 1.1 | and Products | Products | Final | 2018-September-11 |
| | Confirmed Not | Confirmed Not | | |
| | Vulnerable | Vulnerable | | |
| | sections. | | | |
|---------+---------------------+----------------+--------+-------------------|
| 1.0 | Initial public | ? | Final | 2018-September-05 |
| | release. | | | |
+-----------------------------------------------------------------------------+
Legal Disclaimer
* THIS DOCUMENT IS PROVIDED ON AN "AS IS" BASIS AND DOES NOT IMPLY ANY KIND
OF GUARANTEE OR WARRANTY, INCLUDING THE WARRANTIES OF MERCHANTABILITY OR
FITNESS FOR A PARTICULAR USE. YOUR USE OF THE INFORMATION ON THE DOCUMENT
OR MATERIALS LINKED FROM THE DOCUMENT IS AT YOUR OWN RISK. CISCO RESERVES
THE RIGHT TO CHANGE OR UPDATE THIS DOCUMENT AT ANY TIME.
A standalone copy or paraphrase of the text of this document that omits the
distribution URL is an uncontrolled copy and may lack important information
or contain factual errors. The information in this document is intended for
end users of Cisco products.
Cisco Security Vulnerability Policy
* 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.
- --------------------------END INCLUDED TEXT--------------------
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