What is CVE-2024-40493?

CVE-2024-40493 is a critical-severity vulnerability in Keith-Cullen Freecoap, classified under NULL Pointer Dereference. CVSS score: 9.8/10. Published 2024-10-22.

How severe is CVE-2024-40493?

Critical severity. CVSS v3 base score is 9.8 out of 10.

NULL pointer dereference in Keith-Cullen Freecoap

CVE-2024-40493

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`.

EPSS: 0.008 (51.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Keith-cullen Freecoap — versions 1.0
N/a — versions n/a

Weakness classification (CWE)

CWE-476 — NULL Pointer Dereference

References

cve@mitre.org (Exploit, Issue Tracking)
cve@mitre.org (Third Party Advisory)

Frequently asked questions

What is CVE-2024-40493?: CVE-2024-40493 is a critical-severity vulnerability in Keith-Cullen Freecoap, classified under NULL Pointer Dereference. CVSS score: 9.8/10. Published 2024-10-22.
How severe is CVE-2024-40493?: Critical severity. CVSS v3 base score is 9.8 out of 10.