PT-2020-11344 · Contiki · Contiki-Ng+1

Tobias Scharnowski · Published 2020-04-23 · Updated 2021-07-21 · CVE-2019-9183

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

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

Name of the Vulnerable Software and Affected Versions Contiki-NG versions 4.3 and earlier Contiki versions 3.0 and earlier

Description A buffer overflow issue 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.

Recommendations For Contiki-NG versions 4.3 and earlier, update to a version later than 4.3 to resolve the issue. For Contiki versions 3.0 and earlier, update to a version later than 3.0 to resolve the issue. As a temporary workaround, consider restricting the processing of 6LoWPAN fragments to minimize the risk of exploitation.

Fix

Integer Underflow

Memory Corruption

Weakness Enumeration

CWE-191

CWE-787

Related Identifiers

CVE-2019-9183

Affected Products

Contiki

Contiki-Ng

References · 6

• https://github.com/contiki-ng/contiki-ng/pull/972 · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2019-9183 · Security Note
• https://osv.dev/vulnerability/CVE-2019-9183 · Vendor Advisory
• https://github.com/contiki-ng/contiki-ng/releases/tag/release%2Fv4.4 · Note
• https://usenix.org/system/files/sec20summer_clements_prepub.pdf · Note
• https://t.me/cvenotify/3094 · Telegram Post