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AUSCERT External Security Bulletin Redistribution
ESB-2023.1006
SVD-2023-0209: SPL Command Safeguards Bypass via the 'map'
SPL Command 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-2023-22939
Original Bulletin:
https://advisory.splunk.com//advisories/SVD-2023-0209
Comment: CVSS (Max): 8.1 CVE-2023-22939 (CVSS:3.1/AV:N/AC:L/PR:N/UI:R/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:L/PR:N/UI:R/S:U/C:H/I:H/A:N
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SPL Command Safeguards Bypass via the 'map' SPL Command in Splunk Enterprise
Advisory ID: SVD-2023-0209
CVE ID: CVE-2023-22939
Published: 2023-02-14
Last Update: 2023-02-14
CVSSv3.1 Score: 8.1, High
CVSSv3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N
CWE: CWE-20
Bug ID: SPL-230588
Description
In Splunk Enterprise versions below 8.1.13, 8.2.10, and 9.0.4, the 'map' search
processing language (SPL) command lets a search bypass SPL safeguards for risky
commands . The vulnerability requires a higher privileged user to initiate a
request within their browser and only affects instances with 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 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
Splunk Cloud Platform - Splunk Web 9.2.2209 and lower 9.2.2209.3
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.
Detections
o Splunk Risky Command Abuse Disclosed February 2023
This hunting search provides information about potential abuse of the 'map' SPL
command.
Severity
Splunk rated the vulnerability as High, 8.1, with a CVSSv3.1 vector of CVSS:3.1
/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N.
If the Splunk Enterprise instance does not run Splunk Web, there is no impact
and the severity is Informational.
Acknowledgments
Klevis Luli, Splunk
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