CVE-2023-37459 Information

Description

Contiki-NG is an operating system for internet-of-things devices. In versions 4.9 and prior when a packet is received the Contiki-NG network stack attempts to start the periodic TCP timer if it is a TCP packet with the SYN flag set. But the implementation does not first verify that a full TCP header has been received. Specifically the implementation attempts to access the flags field from the TCP buffer in the following conditional expression in the check_for_tcp_syn function. For this reason an attacker can inject a truncated TCP packet which will lead to an out-of-bound read from the packet buffer. As of time of publication a patched version is not available. As a workaround one can apply the changes in Contiki-NG pull request 2510 to patch the system.

CVSS Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

Reference

https://github.com/contiki-ng/contiki-ng/pull/2510 https://github.com/contiki-ng/contiki-ng/security/advisories/GHSA-6648-m23r-hq8c

Attack Complexity

LOW

Privileges Required

NONE

User Interaction Required

NONE

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

LOW

Availability Impact

NONE

Base Score

NONE

Base Severity

5.3