CVE-2024-40493 — CRITICAL (9.8)

Vulnerability 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`.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Affected Products

Vendor	Product	Versions
Keith-Cullen	Freecoap	1.0

Related Weaknesses (CWE)

CWE-476

References

https://gist.github.com/dqp10515/fe80005e2fb58ed8ada178ac017e4ad4Third Party Advisory
https://github.com/keith-cullen/FreeCoAP/issues/37ExploitIssue Tracking

FAQ

What is CVE-2024-40493?

CVE-2024-40493 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 sp...

How severe is CVE-2024-40493?

CVE-2024-40493 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2024-40493?

Check the references section above for vendor advisories and patch information. Affected products include: Keith-Cullen Freecoap.