Vulnerability Details : CVE-2021-21410
Contiki-NG is an open-source, cross-platform operating system for Next-Generation IoT devices. An out-of-bounds read can be triggered by 6LoWPAN packets sent to devices running Contiki-NG 4.6 and prior. The IPv6 header decompression function (<code>uncompress_hdr_iphc</code>) does not perform proper boundary checks when reading from the packet buffer. Hence, it is possible to construct a compressed 6LoWPAN packet that will read more bytes than what is available from the packet buffer. As of time of publication, there is not a release with a patch available. Users can apply the patch for this vulnerability out-of-band as a workaround.
Products affected by CVE-2021-21410
- cpe:2.3:o:contiki-ng:contiki-ng:*:*:*:*:*:*:*:*
Exploit prediction scoring system (EPSS) score for CVE-2021-21410
0.18%
Probability of exploitation activity in the next 30 days
EPSS Score History
~ 54 %
Percentile, the proportion of vulnerabilities that are scored at or less
CVSS scores for CVE-2021-21410
| Base Score | Base Severity | CVSS Vector | Exploitability Score | Impact Score | Score Source | First Seen |
|---|---|---|---|---|---|---|
|
6.4
|
MEDIUM | AV:N/AC:L/Au:N/C:P/I:N/A:P |
10.0
|
4.9
|
NIST | |
|
9.1
|
CRITICAL | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
3.9
|
5.2
|
NIST | |
|
8.2
|
HIGH | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:L |
3.9
|
4.2
|
GitHub, Inc. |
CWE ids for CVE-2021-21410
-
The product reads data past the end, or before the beginning, of the intended buffer.Assigned by: security-advisories@github.com (Primary)
References for CVE-2021-21410
-
https://github.com/contiki-ng/contiki-ng/pull/1482
Added buffer boundary checks for 6LoWPAN decompression by nvt · Pull Request #1482 · contiki-ng/contiki-ng · GitHubPatch;Third Party Advisory
-
https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-hhwj-2p59-v8p9
Out-of-bounds read in the 6LoWPAN implementation · Advisory · contiki-ng/contiki-ng · GitHubPatch;Third Party Advisory
Jump to