CVE-2024-40493

Keith-cullen Freecoap remote code execution

9.8 CRITICALEPSS 0.78%

Published22 Oct 2024

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 3.1 breakdown

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

ScopeUnchanged

ConfidentialityHigh

IntegrityHigh

AvailabilityHigh

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

Affected products

Keith-cullen Freecoap1.0

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

Frequently asked

Is CVE-2024-40493 being actively exploited?

CVE-2024-40493 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.78%.

How severe is CVE-2024-40493?

CVE-2024-40493 has a CVSS 3.1 base score of 9.8, rated critical. EPSS estimates a 0.78% probability of exploitation.

Which products are affected by CVE-2024-40493?

Affected products include Keith-cullen Freecoap.

How do I fix CVE-2024-40493?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2024-40493 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.