Buffer overflow in Ecobee Ecobee3 Lite
CVE-2021-27954
A heap-based buffer overflow vulnerability exists on the ecobee3 lite 4.5.81.200 device in the HKProcessConfig function of the HomeKit Wireless Access Control setup process. A threat actor can exploit this vulnerability to force the device to connect to a SSID or cause a denial of service.
Vulnerability class: Buffer Overflow
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.2 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H.
EPSS exploit prediction
EPSS: 0.009 (59.3th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000
Affected products
- Ecobee Ecobee3 Lite
- Ecobee Ecobee3 Lite Firmware — versions 4.5.81.200
Weakness classification (CWE)
References
- www.l9group.com/advisories/ecobee3-lite-heap-overflow (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-27954?
- CVE-2021-27954 is a high-severity vulnerability in Ecobee Ecobee3 Lite, classified under Out-of-bounds Write. CVSS score: 8.2/10. Published 2021-08-03.
- How severe is CVE-2021-27954?
- High severity. CVSS v3 base score is 8.2 out of 10.