CVE-2019-9183

HIGH

Contiki-NG < 4.3 and Contiki < 3.0 - Denial of Service via 6LoWPAN Fragment Processing Integer Underflow

Title source: llm
STIX 2.1

Description

An issue was discovered in Contiki-NG through 4.3 and Contiki through 3.0. A buffer overflow is present due to an integer underflow during 6LoWPAN fragment processing in the face of truncated fragments in os/net/ipv6/sicslowpan.c. This results in accesses of unmapped memory, crashing the application. An attacker can cause a denial-of-service via a crafted 6LoWPAN frame.

References (3)

Core 3
Core References
Patch, Third Party Advisory x_refsource_confirm
https://github.com/contiki-ng/contiki-ng/pull/972
Release Notes, Third Party Advisory x_refsource_confirm
https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.4
Technical Description, Third Party Advisory x_refsource_misc
https://www.usenix.org/system/files/sec20summer_clements_prepub.pdf

Scores

CVSS v3 7.5
EPSS 0.0226
EPSS Percentile 80.6%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Details

CWE
CWE-191 CWE-787
Status published
Products (2)
contiki-ng/contiki-ng < 4.3
contiki-os/contiki < 3.0
Published Apr 23, 2020
Tracked Since Feb 18, 2026