CVE-2021-27953

EUVD-2021-14671
A NULL pointer dereference vulnerability exists on the ecobee3 lite 4.5.81.200 device in the HomeKit Wireless Access Control setup process. A threat actor can exploit this vulnerability to cause a denial of service, forcing the device to reboot via a crafted HTTP request.
ProviderTypeBase ScoreAtk. VectorAtk. ComplexityPriv. RequiredVector
NISTPrimary
7.5 HIGH
NETWORK
LOW
NONE
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Base Score
CVSS 3.x
EPSS Score
Percentile: 79%
Affected Products (NVD)
VendorProductVersion
ecobeeecobee3_lite_firmware
4.5.81.200
𝑥
= Vulnerable software versions
Common Weakness Enumeration
References
https://www.l9group.com/advisories/remote-denial-of-service-of-ecobee3-lite
https://www.l9group.com/advisories/remote-denial-of-service-of-ecobee3-lite