Splunk: CVE-2023-40593: Denial of Service (DoS) in Splunk Enterprise Using a Malformed SAML Request

In Splunk Enterprise versions lower than 9.0.6, and 8.2.12, an attacker can send a malformed security assertion markup language (SAML) request to the/saml/acsREST endpoint which can cause a denial of service through a crash or hang of the Splunk daemon.The SAML extensible markup language (XML) parser does not fail SAML signature validation when the attacker modifies the URI in the SAML request. Instead it attempts to access the modified URI, which causes the Splunk daemon to crash or hang.