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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2023.3150 SVD-2023-0603: HTTP Response Splitting via the 'rest' SPL Command 2 June 2023 =========================================================================== AusCERT Security Bulletin Summary --------------------------------- Product: Splunk Enterprise Splunk Cloud Platform Publisher: Splunk Operating System: Windows UNIX variants (UNIX, Linux, OSX) Resolution: Patch/Upgrade CVE Names: CVE-2023-32708 Original Bulletin: https://advisory.splunk.com//advisories/SVD-2023-0603 Comment: CVSS (Max): 7.2 CVE-2023-32708 (CVSS:3.1/AV:N/AC:L/PR:H/UI:N/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:H/UI:N/S:U/C:H/I:H/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- HTTP Response Splitting via the 'rest' SPL Command Advisory ID: SVD-2023-0603 CVE ID: CVE-2023-32708 Published: 2023-06-01 Last Update: 2023-06-01 CVSSv3.1 Score: 7.2, High CVSSv3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H CWE: CWE-113 Bug ID: SPL-235203 Description A low-privileged user can trigger an HTTP response splitting vulnerability with the 'rest' SPL command that lets them potentially access other REST endpoints in the system arbitrarily, including viewing restricted content. Solution For Splunk Enterprise, upgrade versions to 9.0.5, 8.2.11, 8.1.14, or higher. For Splunk Cloud Platform, Splunk is monitoring and patching affected instances. Product Status Product Version Component Affected Version Fix Version Splunk Enterprise 8.1 Splunk Web 8.1.0 to 8.1.13 8.1.14 Splunk Enterprise 8.2 Splunk Web 8.2.0 to 8.2.10 8.2.11 Splunk Enterprise 9.0 Splunk Web 9.0.0 to 9.0.4 9.0.5 Splunk Cloud Platform Splunk Web 9.0.2303 and lower 9.0.2303.100 Mitigations and Workarounds For Splunk Enterprise, limit the number of searches a process can run by editing the limits.conf configuration file and giving the 'max_searches_per_process' setting a value of either 1 or 0. For Splunk Cloud Platform, file a support ticket to adjust this configuration setting. Detections o Splunk http response splitting via rest SPL command This detection search provides information about a possible HTTP response splitting exploitation In Splunk Enterprise versions below 9.0.5, 8.2.11, and 8.1.14. Severity Splunk rated the vulnerability as High, 7.2, with a CVSSv3.1 vector of CVSS:3.1 /AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H. Acknowledgments Danylo Dmytriiev (DDV_UA) - --------------------------END INCLUDED TEXT-------------------- You have received this e-mail bulletin as a result of your organisation's registration with AusCERT. The mailing list you are subscribed to is maintained within your organisation, so if you do not wish to continue receiving these bulletins you should contact your local IT manager. If you do not know who that is, please send an email to auscert@auscert.org.au and we will forward your request to the appropriate person. NOTE: Third Party Rights This security bulletin is provided as a service to AusCERT's members. As AusCERT did not write the document quoted above, AusCERT has had no control over its content. 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