by Kastro
Paper/Archive/CVE-2021-21280

CVE-2021-21280

contiki-ng contiki-ng — Out-of-bounds write when processing 6LoWPAN extension headers

EPSS 1%CVSS 9.8
critical.is priorityof 100
42
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 64.7.647 × 2012.9No public exploit+100.0SSVC exploitation: unknown+100.0
Description · from the CVE record

Contiki-NG is an open-source, cross-platform operating system for internet of things devices. It is possible to cause an out-of-bounds write in versions of Contiki-NG prior to 4.6 when transmitting a 6LoWPAN packet with a chain of extension headers. Unfortunately, the written header is not checked to be within the available space, thereby making it possible to write outside the buffer. The problem has been patched in Contiki-NG 4.6. Users can apply the patch for this vulnerability out-of-band as a workaround.

Affected

ProductAffectedFixed inSource
contiki-ng< 4.6–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)8.6CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H

References

refgithub.com/contiki-ng/contiki-ng/security/advisories/GHSA-r768-hrhf-v592refgithub.com/contiki-ng/contiki-ng/pull/1409