CVE-2019-9183

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.

• CWE-191
• CWE-787

• https://github.com/contiki-ng/contiki-ng/pull/972Patch, Third Party Advisory
• https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.4Release Notes, Third Party Advisory
• https://www.usenix.org/system/files/sec20summer_clements_prepub.pdfTechnical Description, Third Party Advisory
• https://github.com/contiki-ng/contiki-ng/pull/972Patch, Third Party Advisory
• https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.4Release Notes, Third Party Advisory
• https://www.usenix.org/system/files/sec20summer_clements_prepub.pdfTechnical Description, Third Party Advisory

Published

Apr 23, 2020

Last Modified

Jun 17, 2026

Status

Modified

• How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
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