Description
An issue in `coap_pdu.c` in libcoap 4.3.4 allows attackers to cause undefined behavior via a sequence of messages leading to unsigned integer overflow.
References (5)
Core 5
Core References
Exploit, Issue Tracking
https://github.com/obgm/libcoap/issues/1351
Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/LPENEJBV3KSASIYKNZAKXDAH7Q66KPYG/
Mailing List, Third Party Advisory
https://lists.fedoraproject.org/archives/list/[email protected]/message/TUL7QDYFGEIJVO2ZSG4O5HEAWR6PFC52/
Mailing List, Third Party Advisory vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/LPENEJBV3KSASIYKNZAKXDAH7Q66KPYG/
Mailing List, Third Party Advisory vendor-advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/TUL7QDYFGEIJVO2ZSG4O5HEAWR6PFC52/
Scores
CVSS v3
7.5
EPSS
0.0009
EPSS Percentile
25.0%
Attack Vector
NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
CISA SSVC
Vulnrichment
Exploitation
poc
Automatable
no
Technical Impact
partial
Details
CWE
CWE-190
Status
published
Products (3)
fedoraproject/fedora
39
fedoraproject/fedora
40
libcoap/libcoap
4.3.4
Published
Apr 17, 2024
Tracked Since
Feb 18, 2026