libcoap

About this tag
libcoap is a compact open-source implementation of the Constrained Application Protocol (CoAP), commonly used in constrained IoT devices, gateways, and embedded systems. Recent discussions on WindowsForum.com highlight CVE-2025-34468, a stack-based buffer overflow vulnerability in libcoap's address-resolution path. This flaw allows attacker-controlled hostnames to overflow a fixed 256-byte stack buffer, leading to denial of service and potential remote code execution. The vulnerability underscores security risks in CoAP implementations and the importance of patching libcoap in affected systems.

  1. CVE-2025-34468: libcoap Address Resolution Overflow Causes DoS

    A stack-based buffer overflow affecting libcoap’s address-resolution path has been publicly disclosed as CVE-2025-34468; the defect allows attacker-controlled hostnames to overflow a fixed 256-byte stack buffer in certain code paths, producing reliable Denial‑of‑Service and an...
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    • buffer overflow libcoap proxy path vulnerability
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    • Forum: Security Alerts