by Kastro
Paper/Archive/CVE-2024-40493

CVE-2024-40493

keithcullen freecoap — Null Pointer Dereference in `coap_client_exchange_blockwise2` function in Keith Cullen FreeCoAP 1.0 allows remote attackers to cause a de…

EPSS 0.8%public exploitCVSS 9.8
critical.is priorityof 100
51
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 56.1.561 × 2011.2Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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`.

Affected

ProductAffectedFixed inSource
n/an/a–CNA
freecoap1.0–CISA-ADP

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CISA ADP5.3CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: partial

References

refgithub.com/keith-cullen/FreeCoAP/issues/37refgist.github.com/dqp10515/fe80005e2fb58ed8ada178ac017e4ad4