VULNERABILITY INTELLIGENCE

CVE-2024-40493

CVSS score9.8 CRITICAL
EPSS probability0.78%
CISA KEVNot currently listed
Published2024-10-22
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Description

Null Pointer Dereference in `coap_client_exchange_blockwise2` function in Keith Cullen FreeCoAP 1.0 allows remote attackers to cause a denial of service and potentially execute arbitrary code via a specially crafted CoAP packet that causes `coap_msg_get_payload(resp)` to return a null pointer, which is then dereferenced in a call to `memcpy`.

Weakness classification

  • nvd@nist.gov: CWE-476
  • 134c704f-9b21-4f2e-91b3-4a467353bcc0: CWE-476

Primary references