PT-2021-14485 · Unknown · Contiki-Ng

Joakimeriksson · Published 2021-06-18 · Updated 2021-06-24 · CVE-2021-21410

Positive Technologies (AI Summary)

CVSS v3.1

9.1

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Contiki-NG versions 4.6 and prior

Description An out-of-bounds read can be triggered by 6LoWPAN packets sent to devices running Contiki-NG. The IPv6 header decompression function (uncompress hdr iphc) does not perform proper boundary checks when reading from the packet buffer, allowing the construction of a compressed 6LoWPAN packet that reads more bytes than available from the packet buffer.

Recommendations For Contiki-NG versions 4.6 and prior, users can apply the patch for this issue out-of-band as a workaround. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Out of bounds Read

Weakness Enumeration

CWE-125

Related Identifiers

CVE-2021-21410

GHSA-HHWJ-2P59-V8P9

Affected Products

Contiki-Ng

References · 5

• https://github.com/contiki-ng/contiki-ng/pull/1482 · Patch
• https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-hhwj-2p59-v8p9 · Patch
• https://osv.dev/vulnerability/CVE-2021-21410 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-21410 · Security Note
• https://t.me/cvenotify/16562 · Telegram Post