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AUSCERT External Security Bulletin Redistribution
ESB-2019.0567
IBM Security Bulletin: BigFix deployments with internet-facing relays that
are not configured as authenticating are prone to security
threats (CVE-2019-4061)
25 February 2019
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AusCERT Security Bulletin Summary
---------------------------------
Product: IBM BigFix Platform
Publisher: IBM
Operating System: Windows
UNIX variants (UNIX, Linux, OSX)
Impact/Access: Access Confidential Data -- Remote/Unauthenticated
Resolution: Patch/Upgrade
CVE Names: CVE-2019-4061
Original Bulletin:
http://www.ibm.com/support/docview.wss?uid=ibm10870242
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Security Bulletin: BigFix deployments with internet-facing relays that are not
configured as authenticating are prone to security threats (CVE-2019-4061)
Document information
More support for: IBM BigFix Platform
Component: Not Applicable
Software version: 9.2, 9.5
Operating system(s): Platform Independent
Reference #: 0870242
Modified date: 18 February 2019
Summary
Internet-facing relays, if any, in a BigFix deployment might be configured as
non-authenticating, which exposes the deployment to security risks. Security
attacks in this context might mean unauthorized access to the relays and any
content or actions, and download packages associated with them or to the Relay
Diagnostics page that might contain sensitive information (for example:
software, vulnerability information, and passwords).
Vulnerability Details
CVEID: CVE-2019-4061
DESCRIPTION: IBM BigFix Platform could allow an attacker to query the relay
remotely and gather information about the updates and fixlets deployed to the
associated sites due to not enabling authenticated access.
CVSS Base Score: 5.3
CVSS Temporal Score: See https://exchange.xforce.ibmcloud.com/vulnerabilities/
156869 for the current score
CVSS Environmental Score*: Undefined
CVSS Vector: (CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N)
Affected Products and Versions
+------------------------------+-----------------+
| Affected IBM BigFix Platform |Affected Versions|
+------------------------------+-----------------+
|BigFix Platform | 9.5 - 9.5.11 |
+------------------------------+-----------------+
|BigFix Platform | 9.2 - 9.2.16 |
+------------------------------+-----------------+
Remediation/Fixes
Note: The following procedure applies to both 9.2.x and 9.5.x.
To remediate the security vulnerability, configure the internet-facing relays
in your BigFix deployment as "authenticating". When a relay is configured as
authenticating, only the BigFix clients in your environment can connect to it
and all the communication between them happens through TLS (HTTPS). This
configuration also prevents any unauthorized access to the Relay Diagnostics
page.
To enable the relays in your environment for authentication, do the following
steps:
1. On the BES Support website, find the BES Client Settings: Enable Relay
authentication fixlet.
2. Run the fixlet and wait for the action to finish.
For more details, see Authenticating Relays .
CVE-to-Component Breakdown
+----------------------------+------------------------------+
| CVEs |Affected Components |
+----------------------------+------------------------------+
| CVE-2019-4061 |Internet-facing relays, if |
| |any. |
+----------------------------+------------------------------+
Workarounds and Mitigations
Using firewall rules to restrict access to a specific IP range or VPN-based
connection management can limit the exposure. Note that a skilled attacker may
still be able to overcome these restrictions through spoofing or gaining
access to other machines on the trusted network.
Change History
2019-02-12: Added CVE/CVSS details, added mitigation steps.
2019-02-04: Original version published
*The CVSS Environment Score is customer environment specific and will
ultimately impact the Overall CVSS Score. Customers can evaluate the impact of
this vulnerability in their environments by accessing the links in the
Reference section of this Security Bulletin.
Disclaimer
According to the Forum of Incident Response and Security Teams (FIRST), the
Common Vulnerability Scoring System (CVSS) is an "industry open standard
designed to convey vulnerability severity and help to determine urgency and
priority of response." IBM PROVIDES THE CVSS SCORES ""AS IS"" WITHOUT WARRANTY
OF ANY KIND, INCLUDING THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
FOR A PARTICULAR PURPOSE. CUSTOMERS ARE RESPONSIBLE FOR ASSESSING THE IMPACT
OF ANY ACTUAL OR POTENTIAL SECURITY VULNERABILITY.
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