Protect yourself against future threats.
-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA256
===========================================================================
AUSCERT External Security Bulletin Redistribution
ESB-2022.4077
Ingest Actions UI in Splunk Enterprise 9.0.0 disabled TLS
certificate validation
17 August 2022
===========================================================================
AusCERT Security Bulletin Summary
---------------------------------
Product: Splunk Enterprise
Publisher: Splunk
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Resolution: Patch/Upgrade
CVE Names: CVE-2022-37437
Original Bulletin:
https://www.splunk.com/en_us/product-security/announcements/svd-2022-0801.html
Comment: CVSS (Max): 7.4 CVE-2022-37437 (CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N)
CVSS Source: Splunk
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- --------------------------BEGIN INCLUDED TEXT--------------------
Splunk / Product Security / SVD-2022-0801
Ingest Actions UI in Splunk Enterprise 9.0.0 disabled TLS certificate
validation
Advisory ID: SVD-2022-0801
Published: 2022-08-16
Last Update: 2022-08-16
CVE ID: CVE-2022-37437
CVSSv3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
CVSSv3.1 Score: 7.4, High
Bug ID: SPL-224209
CWE: CWE-295
Description
When using Ingest Actions to configure a destination that resides on Amazon
Simple Storage Service (S3) in Splunk Web, TLS certificate validation is not
correctly performed and tested for the destination. The vulnerability only
affects connections between Splunk Enterprise and an Ingest Actions Destination
through Splunk Web and only applies to environments that have configured TLS
certificate validation . It does not apply to Destinations configured directly
in the outputs.conf configuration file. The vulnerability affects Splunk
Enterprise version 9.0.0 and does not affect versions below 9.0.0, including
the 8.1.x and 8.2.x versions.
Solution
For Splunk Enterprise customers that use Ingest Actions , in particular to
create or test new destinations, and have configured TLS certificate validation
, upgrade Splunk Enterprise 9.0.0 to 9.0.1 or higher.
Product Status
Product Version Component Affected Version Fixed Version
Splunk Enterprise 8.1 - Not affected -
Splunk Enterprise 8.2 - Not affected -
Splunk Enterprise 9.0 Ingest Actions 9.0.0 9.0.1
Mitigations and Workarounds
In 9.0.0, you can enable TLS certification validation for previously created
destinations by adding the following to the "[rfs:s3]" destination stanza in
outputs.conf:
[rfs:s3]
# existing settings
remote.s3.sslVerifyServerCert=true
remote.s3.sslVerifyServerName=true
remote.s3.sslRootCaPath=<path to SSL CA cert chain>
This mirrors what was configured for enabling TLS certificate validation , but
in the outputs.conf/[rfs:s3] stanza as opposed to server.conf/[sslConfig].
Restart Splunk Enterprise after making these changes.
Severity
If the environment has not configured a Destination in the Ingest Actions
component via the user interface, there is no impact, and the vulnerability is
Informational. If the environment has not configured TLS certificate validation
, there is no impact and the vulnerability is Informational. If the environment
has configured both, Splunk rates the severity as High, 7.4 with a CVSSv3.1
vector of CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N.
Acknowledgments
Eric LaMothe at Splunk
Ali Mirheidari at Splunk
- --------------------------END INCLUDED TEXT--------------------
You have received this e-mail bulletin as a result of your organisation's
registration with AusCERT. The mailing list you are subscribed to is
maintained within your organisation, so if you do not wish to continue
receiving these bulletins you should contact your local IT manager. If
you do not know who that is, please send an email to auscert@auscert.org.au
and we will forward your request to the appropriate person.
NOTE: Third Party Rights
This security bulletin is provided as a service to AusCERT's members. As
AusCERT did not write the document quoted above, AusCERT has had no control
over its content. The decision to follow or act on information or advice
contained in this security bulletin is the responsibility of each user or
organisation, and should be considered in accordance with your organisation's
site policies and procedures. AusCERT takes no responsibility for consequences
which may arise from following or acting on information or advice contained in
this security bulletin.
NOTE: This is only the original release of the security bulletin. It may
not be updated when updates to the original are made. If downloading at
a later date, it is recommended that the bulletin is retrieved directly
from the author's website to ensure that the information is still current.
Contact information for the authors of the original document is included
in the Security Bulletin above. If you have any questions or need further
information, please contact them directly.
Previous advisories and external security bulletins can be retrieved from:
https://www.auscert.org.au/bulletins/
===========================================================================
Australian Computer Emergency Response Team
The University of Queensland
Brisbane
Qld 4072
Internet Email: auscert@auscert.org.au
Facsimile: (07) 3365 7031
Telephone: (07) 3365 4417 (International: +61 7 3365 4417)
AusCERT personnel answer during Queensland business hours
which are GMT+10:00 (AEST).
On call after hours for member emergencies only.
===========================================================================
-----BEGIN PGP SIGNATURE-----
Comment: https://auscert.org.au/gpg-key/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=Qr30
-----END PGP SIGNATURE-----