CVE-2024-40494 json
Buffer Overflow in coap_msg.c in FreeCoAP allows remote attackers to execute arbitrary code or cause a denial of service (stack buffer over…
published 2024-10-22 2 y ago modified 2026-06-17 4 mo ago also EUVD-2024-38481
- cvss
- 9.8
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 1.2%
- EPSS 1.2% chance of exploitation in 30 days, percentile 67%
- public exploits
- 0
- none known
Summary
Buffer Overflow in coap_msg.c in FreeCoAP allows remote attackers to execute arbitrary code or cause a denial of service (stack buffer overflow) via a crafted packet.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- total
- Assessed
- 2 y ago
Exploit prediction
1.17% chance of exploitation in the next 30 days, higher than 67% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- github.com https://github.com/dqp10515/security/tree/main/FreeCoAP_bug referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
| CNA | 3.1 | 9.8 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
Affected products
- keithcullen freecoap
Classification
- Weakness
-
- CWE-120 Buffer Copy without Checking Size of Input
References
-
github.com
/dqp10515/security/tree/main/FreeCoAP_bug
exploit
-
gist.github.com
/dqp10515/e9d7d663cb89187bfe7b39bb3aeb0113
third-party-advisory
Sources
- CVE List CVE-2024-40494
- NVD CVE-2024-40494
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