CVE-2021-21282

Buffer overflow in RPL source routing header processing

CRITICAL
9.8
CVSS Score
Published: June 18, 2021 at 08:00 PM UTC
Updated: June 17, 2026 at 03:35 AM UTC
1 product affected across 1 vendorContiki-NG

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Severity
CRITICAL9.8
Exploit prediction
EPSS 1.0%

Description

Contiki-NG is an open-source, cross-platform operating system for internet of things devices. In versions prior to 4.5, buffer overflow can be triggered by an input packet when using either of Contiki-NG's two RPL implementations in source-routing mode. The problem has been patched in Contiki-NG 4.5. Users can apply the patch for this vulnerability out-of-band as a workaround.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

v < 4.5
Affected range stops below 4.5, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (2)

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
HIGH
Integrity
HIGH
Availability
HIGH
Vector?

Quick Info

StatusMODIFIED
CWE
CWE-120

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