CVE-2024-40493

Public Exploit

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`.

Category

9.8
CVSS
Severity: Critical
CVSS 3.1 •
EPSS 0.78% Top 30%
Third-Party Advisory github.com
Affected: n/a n/a
Published at:
Updated at:

References

Link Tags
https://github.com/keith-cullen/FreeCoAP/issues/37 issue tracking exploit
https://gist.github.com/dqp10515/fe80005e2fb58ed8ada178ac017e4ad4 third party advisory

Frequently Asked Questions

What is the severity of CVE-2024-40493?
CVE-2024-40493 has been scored as a critical severity vulnerability.
How to fix CVE-2024-40493?
To fix CVE-2024-40493, make sure you are using an up-to-date version of the affected component(s) by checking the vendor release notes. As for now, there are no other specific guidelines available.
Is CVE-2024-40493 being actively exploited in the wild?
It is possible that CVE-2024-40493 is being exploited or will be exploited in a near future based on public information. According to its EPSS score, there is a ~1% probability that this vulnerability will be exploited by malicious actors in the next 30 days.
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