PT-2024-28876 · Freecoap · Freecoap

Dqp10515 · Published 2024-10-22 · Updated 2024-10-25 · CVE-2024-40493

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions FreeCoAP version 1.0

Description The issue allows remote attackers to cause a denial of service and potentially execute arbitrary code via a specially crafted CoAP packet. This packet causes coap msg get payload(resp) to return a null pointer, which is then dereferenced in a call to memcpy. The coap client exchange blockwise2 function is specifically affected.

Recommendations For FreeCoAP version 1.0, as a temporary workaround, consider disabling the coap client exchange blockwise2 function until a patch is available. Restrict access to the vulnerable function to minimize the risk of exploitation. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2024-40493

Affected Products

Freecoap

References · 7

• 🔥 https://github.com/keith-cullen/FreeCoAP/issues/37 · Exploit
• https://osv.dev/vulnerability/CVE-2024-40493 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2024-40493 · Security Note
• https://t.me/cvedetector/8663 · Telegram Post
• https://t.me/cvenotify/99530 · Telegram Post
• https://gist.github.com/dqp10515/fe80005e2fb58ed8ada178ac017e4ad4 · Note
• https://twitter.com/CVEnew/status/1849046692756406636 · Twitter Post