PT-2021-17692 · Ecobee · Ecobee3 Lite

Published 2021-08-03 · Updated 2021-08-11 · CVE-2021-27953

Positive Technologies (AI Summary)

CVSS v2.0

7.8

High

Base vector

AV:N/AC:L/Au:N/C:N/I:N/A:C

Name of the Vulnerable Software and Affected Versions: ecobee3 lite version 4.5.81.200

Description: A NULL pointer dereference issue exists in the HomeKit Wireless Access Control setup process, allowing a threat actor to cause a denial of service by forcing the device to reboot via a crafted HTTP request.

Recommendations: For ecobee3 lite version 4.5.81.200, consider restricting access to the HomeKit Wireless Access Control setup process until a patch is available to prevent potential denial of service attacks. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

NULL Pointer Dereference

Weakness Enumeration

CWE-476

Related Identifiers

CVE-2021-27953

Affected Products

Ecobee3 Lite

References · 4

• 🔥 https://l9group.com/advisories/remote-denial-of-service-of-ecobee3-lite · Exploit
• https://nvd.nist.gov/vuln/detail/CVE-2021-27953 · Security Note
• https://osv.dev/vulnerability/CVE-2021-27953 · Vendor Advisory
• https://t.me/cibsecurity/26746 · Telegram Post