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-----BEGIN PGP SIGNED MESSAGE----- Hash: SHA256 =========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2023.3142 SVD-2023-0601: Denial Of Service due to Untrusted XML Tag in XML Parser within SAML Authentication 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-2023-32706 Original Bulletin: https://advisory.splunk.com//advisories/SVD-2023-0601 Comment: CVSS (Max): 7.7 CVE-2023-32706 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H) CVSS Source: Splunk Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H - --------------------------BEGIN INCLUDED TEXT-------------------- Denial Of Service due to Untrusted XML Tag in XML Parser within SAML Authentication Advisory ID: SVD-2023-0601 CVE ID: CVE-2023-32706 Published: 2023-06-01 Last Update: 2023-06-01 CVSSv3.1 Score: 7.7, High CVSSv3.1 Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H CWE: CWE-611 Bug ID: SPL-224292 Description An unauthenticated attacker can send specially-crafted messages to the XML parser within SAML authentication to cause a denial of service in the Splunk daemon. This happens when an incorrectly configured XML parser receives XML input that contains a reference to an entity expansion. Many recursive references to entity expansions can cause the XML parser to use all available memory on the machine, causing the Splunk daemon to crash or be terminated by the operating system. Solution For Splunk Enterprise, upgrade versions to 8.1.14, 8.2.11, 9.0.5, 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 8.1.0 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 9.0.2303 and Splunk Web 9.0.2303.100 Platform below Mitigations and Workarounds Disable single sign-on using SAML as an authentication scheme (SAML SSO). For more information on this type of configuration, see Configure single sign-on with SAML in the Splunk documentation. Detections None Severity Splunk rated the vulnerability as High, 7.7 with a CVSSv3.1 vector of CVSS:3.1/ AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:N/A:H. If the Splunk Enterprise instance does not use SAML SSO for authentication, there is no impact and the severity is Informational. Acknowledgments Vikram Ashtaputre, Splunk - --------------------------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. 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If you have any questions or need further information, please contact them directly. Previous advisories and external security bulletins can be retrieved from: https://www.auscert.org.au/bulletins/ =========================================================================== Australian Computer Emergency Response Team The University of Queensland Brisbane Qld 4072 Internet Email: auscert@auscert.org.au Facsimile: (07) 3365 7031 Telephone: (07) 3365 4417 (International: +61 7 3365 4417) AusCERT personnel answer during Queensland business hours which are GMT+10:00 (AEST). On call after hours for member emergencies only. =========================================================================== -----BEGIN PGP SIGNATURE----- Comment: https://auscert.org.au/gpg-key/ iQIVAwUBZHmFxskNZI30y1K9AQifsxAApSc+1Za1VEGXq89//N0TYp8lY+DHb2dh x0H7JjtVf1KIs58jN8L5e3wz4lf5BvIj6PD3zLGiNDeBaIKk6QdmZgSvVcb1OZa9 wwaPd4IWOvk7h3ttqkC+SXyEA1fXSv9ZfeRSKTXtpuFOuFPWraPSg7qL9K6f7JKp UFHl+efH727L4BeAV0qC+W7Nl04Wcy3uBKUmK5ebXoO4lxJISy0fWLvvWTTOD8Au c9TJha1KtyJaKN2lc/frxfbFymtY6dPC69ibaDAuMUZZH62pb8Dr1QDNrWwWZpKW aVP6ia46qwSg4mxcEaw6qBPPZuahj8bta8JDcDFNbifPMlWPuCgEqpd9h68+xoAp IQ9qT3xj8OsBpGBsLs89mvRdBBuX/DKeTAadgagPhQgSW9ls6kqKyW37smxPfG27 UZDUF7w8Ia0IDW+hgPdEzkBgxnMGTL860e9YBF2d75iohM7HgSF9RbdcnrsSrf6n B/qzhhfw1VDThuzeq9p+1aHBQmbnOImC/cwqLNiFQtFNwLRMy2eptJ1FwNyivk9o qQ6gMafvnf6S5FuWR9qqCPjof9teJJ5wVsJZb92YmVWcwaluqonbVdcLKSfgUa3n W1snQSuDAX+r+tn+hLQfRjC3gjFVPozFBcJ8uTU8Ll65XlcR697y7PRM9egpAdUB nD7T+rjCYVs= =JNg1 -----END PGP SIGNATURE-----