Medium CVSS 5.5

Overview

OpenBSD Kernel Multicast Routing Uninitialized Memory Information Disclosure Vulnerability. This vulnerability allows local attackers to disclose sensitive information on affected installations of OpenBSD Kernel. An attacker must first obtain the ability to execute low-privileged code on the target system in order to exploit this vulnerability.

The specific flaw exists within the implementation of multicast routing. The issue results from the lack of proper initialization of memory prior to accessing it. An attacker can leverage this in conjunction with other vulnerabilities to escalate privileges and execute arbitrary code in the context of the kernel.
. Was ZDI-CAN-14540.

Risk analysis

This vulnerability is rated 🟡 MEDIUM.

  • CVSS: 5.5 (MEDIUM)
  • Detected tags: info_leak, rce, uninit_memory (tag impact: VERY HIGH)

Recommended actions:

  • Reduce verbose errors, remove debug endpoints, minimize PII in logs.
  • Patch/upgrade immediately (remote code execution).
  • Reduce exposure (WAF/segmentation), minimize attack surface.

Recommended tools

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