PT-2020-6245 · Contiki Ng · Contiki-Ng

Joakimeriksson · Published 2020-01-28 · Updated 2021-06-24 · CVE-2021-21282

Positive Technologies (AI Summary)

CVSS v3.1

9.8

Critical

Base vector

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

Name of the Vulnerable Software and Affected Versions Contiki-NG versions prior to 4.5

Description The issue is related to a buffer overflow that can be triggered by an input packet when using either of Contiki-NG's two RPL implementations in source-routing mode. This is due to a lack of size checking for copied data. The problem can be exploited by a remote attacker to cause a denial of service.

Recommendations For versions prior to 4.5, apply the patch for this issue out-of-band as a workaround. As a temporary workaround, consider disabling the use of Contiki-NG's RPL implementations in source-routing mode until the patch is applied.

Fix

Buffer Overflow

Weakness Enumeration

CWE-120

Related Identifiers

BDU:2021-03702

CVE-2021-21282

GHSA-6XF2-77GF-FGJX

Affected Products

Contiki-Ng

References · 6

• https://github.com/contiki-ng/contiki-ng/pull/1183 · Patch
• https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-6xf2-77gf-fgjx · Patch
• https://bdu.fstec.ru/vul/2021-03702 · Security Note
• https://osv.dev/vulnerability/CVE-2021-21282 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-21282 · Security Note
• https://t.me/cvenotify/16557 · Telegram Post