title: Missing Security Control in Zephyr OS IP Packet Handling
description: Zephyr OS IP packet handling does not properly drop IP packets arriving on an external interface with a source address equal to 127.0.01 or the destination address.
affected:
{
defaultStatus: unaffected
packageName: Zephyr
product: Zephyr
repo: https://github.com/zephyrproject-rtos/zephyr
vendor: zephyrproject-rtos
versions:
lessThanOrEqual: 3.5, status: affected, version: *, versionType: git
}
metrics:
cvssV3_1: [
attackComplexity: LOW
attackVector: NETWORK
availabilityImpact: HIGH
baseScore: 8.6
baseSeverity: HIGH
confidentialityImpact: LOW
integrityImpact: LOW
privilegesRequired: NONE
scope: UNCHANGED
userInteraction: NONE
vectorString: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:H
version: 3.1
]
format: CVSS
scenarios: GENERAL