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AUSCERT External Security Bulletin Redistribution
ESB-2023.1009
SVD-2023-0212: Cross-Site Request Forgery in the
'ssg/kvstore_client' REST Endpoint in Splunk Enterprise
17 February 2023
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AusCERT Security Bulletin Summary
---------------------------------
Product: Splunk Enterprise
Publisher: Splunk
Operating System: UNIX variants (UNIX, Linux, OSX)
Windows
Resolution: Patch/Upgrade
CVE Names: CVE-2023-22942
Original Bulletin:
https://advisory.splunk.com//advisories/SVD-2023-0212
Comment: CVSS (Max): 5.4 CVE-2023-22942 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L)
CVSS Source: Splunk
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
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Cross-Site Request Forgery in the 'ssg/kvstore_client' REST Endpoint in Splunk
Enterprise
Advisory ID: SVD-2023-0212
CVE ID: CVE-2023-22942
Published: 2023-02-14
Last Update: 2023-02-14
CVSSv3.1 Score: 5.4, Medium
CVSSv3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L
CWE: CWE-352
Bug ID: SPL-232619
Description
In Splunk Enterprise versions below 8.1.13, 8.2.10, and 9.0.4, a cross-site
request forgery in the Splunk Secure Gateway (SSG) app in the 'kvstore_client'
REST endpoint lets a potential attacker update SSG App Key Value Store (KV
store) collections using an HTTP GET request. SSG is a Splunk-built app that
comes with Splunk Enterprise. The vulnerability affects instances with SSG and
Splunk Web enabled.
Solution
For Splunk Enterprise, upgrade versions to 8.1.13, 8.2.10, 9.0.4, or higher.
For Splunk Cloud Platform, Splunk is actively patching the Splunk Secure
Gateway app and monitoring the Splunk Cloud instances.
Product Status
Product Version Component Affected Version Fix Version
Splunk Enterprise 8.1 Splunk Web 8.1.12 and lower 8.1.13
Splunk Enterprise 8.2 Splunk Web 8.2.0 to 8.2.9 8.2.10
Splunk Enterprise 9.0 Splunk Web 9.0.0 to 9.0.3 9.0.4
Mitigations and Workarounds
If users do not log in to Splunk Web on indexers in a distributed environment,
disable Splunk Web on those indexers. See Disable unnecessary Splunk Enterprise
components and the web.conf configuration specification file for more
information on disabling Splunk Web.
Splunk Secure Gateway is a Splunk-built app that comes with Splunk Enterprise.
If the Splunk instance does not use the SSG functionality, disable or delete
the app. See Manage app and add-on objects for more information.
The SSG app is not available for download or direct update through Splunkbase.
Detections
o Splunk csrf in the ssg kvstore client endpoint
This hunting search provides information on REST method and post data that
might reveal exploitation of this vulnerability.
Severity
Splunk rated the vulnerability as Medium, 5.4, with a CVSSv3.1 vector of
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L. The impact endpoint has limited
functionality to edit minor configurations and disable minor functionality.
If the Splunk Enterprise instance does not run Splunk Web, there is no impact
and the severity is Informational. If the Splunk Enterprise instance disabled
or removed the SSG, there is no impact and the severity is Informational.
Acknowledgments
Anton (therceman)
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