Description

An improper access control vulnerability in CatchPulse could allow a non-administrative local attacker to connect to an unrestricted kernel filter communication port and bypass CatchPulse's security policy enforcement.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.4",
  "pubDate": "2026-08-06T10:16:43.910Z",
  "pubdate": "2026-08-06T10:16:43.910Z",
  "executiveSummary": "An improper access control vulnerability has been identified in CatchPulse, presenting significant security implications for local system integrity. This vulnerability allows a local attacker lacking administrative privileges to successfully connect to an unrestricted kernel filter communication port exposed by the product. By exploiting this flaw, an unprivileged user can effectively bypass CatchPulse's security policy enforcement mechanisms, neutralizing the protective controls implemented by the software.\nThe risk implication of this vulnerability is severe, as it subverts the core security architecture of the affected product, potentially exposing the underlying operating system to unauthorized actions and malicious payloads that the security software was designed to block. The attack requires local execution capabilities, meaning the threat actor must already possess low-privileged code execution on the target machine. No complex interaction or advanced exploitation primitives are necessary beyond establishing communication with the exposed kernel filter port.\nAffected systems include deployments of CatchPulse utilizing the vulnerable kernel filter communication interface. Remediation requires restricting access to the kernel communication port to ensure that only authorized administrative contexts or trusted processes can interact with the underlying filter driver, thereby restoring proper security boundaries and policy enforcement.",
  "technicalDetails": "The root cause of this vulnerability lies in improper access control enforcement governing the kernel filter communication port utilized by CatchPulse. In Windows-based driver architectures, communication between user-mode applications and kernel-mode drivers (such as minifilters or device drivers) typically relies on communication ports, I/O control codes (IOCTLs), or similar messaging interfaces. If these interfaces lack explicit security descriptors or discretionary access control lists (DACLs) upon creation, any local security context may be permitted to open handles and send commands or messages to the kernel driver.\nIn the context of CatchPulse, the kernel filter communication port is exposed without adequate access validation checks, allowing non-administrative local users to establish a communication channel. The vulnerable component resides within the driver communication interface responsible for handling inter-process communication between user-mode clients and the kernel-mode security filter. Because authentication and privilege verification checks are insufficiently enforced or entirely missing during the connection establishment phase or message parsing stage, unprivileged processes can interact directly with the filtering mechanism.\nThe attack flow proceeds as follows: First, the local attacker obtains execution on the target system under a standard, non-administrative user account. Second, the attacker utilizes standard operating system APIs to locate and open a handle to the unrestricted kernel filter communication port exposed by CatchPulse. Third, once the connection or handle is successfully established, the attacker sends crafted messages, control codes, or policy modification payloads directly to the kernel driver. Finally, because the driver fails to properly validate the sender's security token or privilege level, it processes the incoming instructions, leading to the bypass of security policy enforcement. Post-exploitation impact includes the suppression of detection mechanisms, evasion of application whitelisting or behavior monitoring policies, and the potential execution of unauthorized operations that would otherwise be blocked by CatchPulse."
}