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Vulnerability · Published Apr 17, 2024 · Assigned by mitre

CVE-2024-31031

High 7.5

In plain English

A high-severity integer overflow in the libcoap3 package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.9% (higher than 59% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.5High
Exploit odds (30 days)0.9%top 40.9% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12libcoap3no fix listedDEBIAN-CVE-2024-31031
Debian:13libcoap34.3.4-1.1+deb13u1DEBIAN-CVE-2024-31031
Debian:14libcoap34.3.5-1DEBIAN-CVE-2024-31031
Ubuntu:22.04:LTSlibcoap2no fix listedUBUNTU-CVE-2024-31031
Ubuntu:22.04:LTSlibcoap3no fix listedUBUNTU-CVE-2024-31031
Ubuntu:24.04:LTSlibcoap3no fix listedUBUNTU-CVE-2024-31031
Ubuntu:25.10libcoap3no fix listedUBUNTU-CVE-2024-31031
Ubuntu:26.04:LTSlibcoap3no fix listedUBUNTU-CVE-2024-31031
Ubuntu:26.10libcoap3no fix listedUBUNTU-CVE-2024-31031

Affected products (as reported)

VendorProductVersions
n/a n/a n/a

Weakness: CWE-190 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

References