Buffer overflow in Contiki-Ng
CVE-2021-21281
Contiki-NG is an open-source, cross-platform operating system for internet of things devices. A buffer overflow vulnerability exists in Contiki-NG versions prior to 4.6. After establishing a TCP socket using the tcp-socket library, it is possible for the remote end to send a packet with a data offset that is unvalidated. The problem has been patched in Contiki-NG 4.6. Users can apply the patch for this vulnerability out-of-band as a workaround.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.0 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:H.
EPSS exploit prediction
EPSS: 0.009 (58.8th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 58.8% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Contiki-Ng — versions < 4.6
Weakness classification (CWE)
References
- github.com/contiki-ng/contiki-ng/security/advisories/GHSA-mc42-fqfr-h9fp (Patch, Third Party Advisory)
- github.com/contiki-ng/contiki-ng/pull/1366 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-21281?
- CVE-2021-21281 is a high-severity vulnerability in Contiki-Ng, classified under Buffer Copy without Checking Size of Input (Classic Buffer Overflow). CVSS score: 7.0/10. Published 2021-06-18.
- How severe is CVE-2021-21281?
- High severity. CVSS v3 base score is 7.0 out of 10.