XML External Entity Injection through a custom View in Splunk Enterprise
Advisory ID: SVD-2022-1110
CVE ID: CVE-2022-43570
Last Update: 2022-11-02
CVSSv3.1 Score: 8.8, High, High
CVSSv3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Bug ID: SPL-228310
In Splunk Enterprise versions below 8.1.12, 8.2.9, and 9.0.2, an authenticated user can perform an extensible markup language (XML) external entity (XXE) injection via a custom View. The XXE injection causes Splunk Web to embed incorrect documents into an error.
For Splunk Enterprise, upgrade versions to 8.1.12, 8.2.9, 9.0.2, or higher.
For Splunk Cloud Platform, Splunk is actively patching and monitoring the Splunk Cloud instances.
|Product||Version||Component||Affected Version||Fix Version|
|Splunk Enterprise||8.1||Splunk Web||8.1.11 and lower||8.1.12|
|Splunk Enterprise||8.2||Splunk Web||8.2.0 to 8.2.8||8.2.9|
|Splunk Enterprise||9.0||Splunk Web||9.0.0 to 9.0.1||9.0.2|
|Splunk Cloud Platform||Splunk Web||9.0.2208 and lower||9.0.2209|
Mitigations and Workarounds
Workarounds include restricting who can upload lookup files and disabling Splunk Web. The vulnerability affects instances with Splunk Web enabled. See Disable unnecessary Splunk Enterprise components and the web.conf configuration specification file for more information on disabling Splunk Web.
Splunk rates the vulnerability as High, 8.8, with a CVSS Vector of CVSS:3.1/AV:N/AC:L/PR:L/UI:N/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.
Danylo Dmytriiev (DDV_UA)