CVE-2021-21410 Information

Description

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 (uncompress_hdr_iphc) 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.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H

Reference

https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-hhwj-2p59-v8p9 https://github.com/contiki-ng/contiki-ng/pull/1482

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

NONE

Base Score

HIGH

Base Severity

9.1