Splunk: CVE-2023-32712: Unauthenticated Log Injection in Splunk Enterprise

In Splunk Enterprise versions below 9.1.0.2, 9.0.5.1, and 8.2.11.2, an attacker can inject American National Standards Institute (ANSI) escape codes into Splunk log files that, when a vulnerable terminal application reads them, can potentially, at worst, result in possible code execution in the vulnerable application. This attack requires a user to use a terminal application that supports the translation of ANSI escape codes to read the malicious log file locally in the vulnerable terminal, and to perform additional user interaction to exploit. Universal Forwarder versions 9.1.0.1, 9.0.5, 8.2.11, and lower can be vulnerable in the following situations: By default, all Universal Forwarder 9.0 and 9.1 versions bind management services to the local machine (localhost) and are not vulnerable in this specific configuration. SeeSVD-2022-0605for more information. Universal Forwarder versions 9.1 and higher use Unix Domain Sockets (UDS) for communication, further reducing the potential attack surface. The vulnerability does not directly affect Splunk Enterprise or Splunk Universal Forwarder. The indirect impact on the Splunk Enterprise instance and Universal Forwards can vary significantly depending on the permissions in the vulnerable terminal application and where and how the user reads the malicious log file. For example, users can copy the malicious file from the Splunk Enterprise instance and read it on their local machine.