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AUSCERT External Security Bulletin Redistribution
ESB-2022.2962
Splunk Enterprise and Universal Forwarder security update
16 June 2022
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AusCERT Security Bulletin Summary
---------------------------------
Product: Splunk Enterprise
Universal Forwarder
Publisher: Splunk
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Resolution: Patch/Upgrade
CVE Names: CVE-2022-32156
Original Bulletin:
https://www.splunk.com/en_us/product-security/announcements/svd-2022-0606.html
Comment: CVSS (Max): 7.4 CVE-2022-32156 (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
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Splunk Enterprise and Universal Forwarder CLI connections lacked TLS
certificate validation
Advisory ID: SVD-2022-0606 CVE ID: CVE-2022-32156
Published: 2022-06-14 Last Update: 2022-06-14
CVSSv3.1 Score: 7.4, High CVSSv3.1 Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/
S:U/C:H/I:H/A:N
CWE: CWE-295
Bug ID: SPL-49451
CSAF: 2022-06-14-svd-2022-0606
Description
In Splunk Enterprise and Universal Forwarder versions before 9.0, the Splunk
command-line interface (CLI) did not validate TLS certificates while connecting
to a remote Splunk platform instance by default. Splunk peer communications
configured properly with valid certificates were not vulnerable. However,
connections from misconfigured nodes without valid certificates did not fail by
default. After updating to version 9.0, see Configure TLS host name validation
for the Splunk CLI to enable the remediation.
The vulnerability does not affect the Splunk Cloud Platform. At the time of
publishing, we have no evidence of exploitation of this vulnerability by
external parties.
Solution
Upgrade Splunk Enterprise and Universal Forwarder versions to 9.0 or higher and
Configure TLS host name validation for the Splunk CLI.
Product Status
Product Affected Versions
Splunk Enterprise Versions before 9.0
Universal Forwarder Versions before 9.0
Acknowledgments
Chris Green at Splunk
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