Out-of-bounds Read in Contiki-Ng
CVE-2024-41125
Contiki-NG is an open-source, cross-platform operating system for IoT devices. An out-of-bounds read of 1 byte can be triggered when sending a packet to a device running the Contiki-NG operating system with SNMP enabled. The SNMP module is disabled in the default Contiki-NG configuration. The vulnerability exists in the os/net/app-layer/snmp/snmp-ber.c module, where the function snmp_ber_decode_string_len_buffer decodes the string length from a received SNMP packet. In one place, one byte is read from the buffer, without checking that the buffer has another byte available, leading to a possible out-of-bounds read. The problem has been patched in Contiki-NG pull request #2936. It will be included in the next release of Contiki-NG. Users are advised to apply the patch manually or to wait for the next release. A workaround is to disable the SNMP module in the Contiki-NG build configuration.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.3 (High). Vector: CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.003 (19.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 20th percentile — 19.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.003 · change: +0.000
Affected products
- Contiki-Ng — versions <= 4.9
Weakness classification (CWE)
References
- github.com/contiki-ng/contiki-ng/security/advisories/GHSA-qjj3-gqx7-438w (Vendor Advisory)
- github.com/contiki-ng/contiki-ng/pull/2936 (Patch, Issue Tracking)
Frequently asked questions
- What is CVE-2024-41125?
- CVE-2024-41125 is a high-severity vulnerability in Contiki-Ng, classified under Out-of-bounds Read. CVSS score: 8.3/10. Published 2024-11-27.
- How severe is CVE-2024-41125?
- High severity. CVSS v3 base score is 8.3 out of 10.