CVE-2021-21280 Details
Description
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.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
No SSVC data is available for this CVE.
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/contiki-ng/contiki-ng/pull/1409 | CVE | PatchThird Party Advisory |
| https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-r768-hrhf-v592 | CVE | ExploitPatchThird Party Advisory |
| https://github.com/contiki-ng/contiki-ng/pull/1409 | [email protected] | PatchThird Party Advisory |
| https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-r768-hrhf-v592 | [email protected] | ExploitPatchThird Party Advisory |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-787 | Out-of-bounds Write | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| contiki-ng contiki-ng | < 4.6 |
CPE
Remediation
| |
Change History
4 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Jun 17, 2026 | CVE Modified | [email protected] |
| Nov 21, 2024 | CVE Modified | CVE |
| May 14, 2024 | CVE Modified | [email protected] |
| Jun 22, 2021 | Initial Analysis | [email protected] |