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AUSCERT External Security Bulletin Redistribution
ESB-2023.0999
SVD-2023-0203: Persistent Cross-Site Scripting through the
'module' Tag in a View 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-2023-22933
Original Bulletin:
https://advisory.splunk.com//advisories/SVD-2023-0203
Comment: CVSS (Max): 8.0 CVE-2023-22933 (CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H)
CVSS Source: Splunk
Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
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Persistent Cross-Site Scripting through the 'module' Tag in a View in Splunk
Enterprise
Advisory ID: SVD-2023-0203
CVE ID: CVE-2023-22933
Published: 2023-02-14
Last Update: 2023-02-14
CVSSv3.1 Score: 8.0, High
CVSSv3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H
CWE: CWE-79
Bug ID: SPL-228264
Description
In Splunk Enterprise versions below 8.1.13, 8.2.10, and 9.0.4, a View allows
for Cross-Site Scripting (XSS) in an extensible mark-up language (XML) View
through the 'layoutPanel' attribute in the 'module' tag'. The vulnerability
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. to 9.0.3 9.0.4
Splunk Cloud Platform - Splunk Web 9.0.2208 and lower 9.0.2209
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 list all nonstandard admin accounts Splunk XSS via View
This search enumerates all Splunk accounts with administrative rights on an
instance which might have been given maliciously to lower-privileged users as a
result of this vulnerability. The search deliberately ignores the default admin
account since this account is assumed to be present.
Severity
Splunk rated the vulnerability as High, 8.0, with a CVSSv3.1 vector of CVSS:3.1
/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H.
If the Splunk Enterprise instance does not run Splunk Web, there is no impact
and the severity is Informational.
Acknowledgments
Danylo Dmytriiev (DDV_UA)
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