CVE-2023-37459
Assigner: GitHub_M
Published: 2023-09-15T19:19:30.232Z
State: PUBLISHED
title: Out-of-bounds read when processing a received IPv6 packet
problemTypes: descriptions: cweId: CWE-125
description: CWE-125: Out-of-bounds Read
type: CWE
metrics: cvssV3_1: attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: NONE
baseScore: 5.3
baseSeverity: MEDIUM
confidentialityImpact: LOW
integrityImpact: NONE
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
version: 3.1
affected: vendor: contiki-ng
product: contiki-ng
versions: version: <= 4.9
status: affected
descriptions: value: 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.
source: advisory: GHSA-6648-m23r-hq8c
discovery: UNKNOWN