Splunk, a leading security solution, has recently uncovered a critical vulnerability within its powerful Security Orchestration, Automation, and Response (SOAR) application. This flaw, known as CVE-2023-3997, exposes a potential avenue for unauthenticated log injection, enabling malicious actors to execute harmful code on the system.
Splunk SOAR is a powerful application designed to automate repetitive security tasks and respond swiftly to security incidents, enhancing overall productivity. However, it has been identified that the application is vulnerable to an attack vector that involves unauthenticated log injection. The vulnerability specifically requires a terminal application capable of interpreting ANSI escape codes, and the terminal must possess the necessary permissions to exploit this flaw.
Exploitation Method
A threat actor can exploit this vulnerability by sending a malicious web request to an endpoint within the Splunk SOAR system. When a terminal user attempts to view the compromised logs, it results in the execution of the malicious code on the system. The severity of this vulnerability is assessed with a CVSS Score of 8.6, indicating a high-risk potential.
Scope and Impact
The impact of this vulnerability depends on the permissions of the terminal users attempting to access the manipulated log file. If the malicious log file is copied and viewed on a local machine, the local machine will be affected instead of the Splunk SOAR instance.
Affected Versions and Fixes
The vulnerability affects specific versions of Splunk SOAR. For the on-premises version, all versions up to and including 6.0.1 are affected, and the fix is available in version 6.1.0. For the cloud version, the affected versions are up to 6.0.1.123902, and the fix is provided in version 6.1.0.131.
Recommendation
Splunk has released a security advisory regarding this vulnerability, detailing information about the attack vector, complexity, privileges, scope, and user interaction. Users of Splunk SOAR are strongly advised to upgrade to the latest versions (6.1.0) to protect their systems from potential exploitation by threat actors.
Please ensure that you promptly update your Splunk SOAR installation to the latest version and take necessary precautions to mitigate the risk associated with this vulnerability. Stay vigilant and follow best practices in cybersecurity to safeguard your systems and data.
