VulnerabilityModified
CVE-2021-27953
A NULL pointer dereference vulnerability exists on the ecobee3 lite 4.5.81.200 device in the HomeKit Wireless Access Control setup process.
HIGH 7.5EPSS 1.67%
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (1.67%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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.
- CVSS 3.1
- 7.5 HIGHCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- EPSS
- 1.67% probability · 76th percentile
- CISA KEV
- Not listed
- Weakness
- CWE-476
- Affected
- ecobee/ecobee3 lite firmware
- Source
- cve@mitre.org
References
- https://www.l9group.com/advisories/remote-denial-of-service-of-ecobee3-liteExploit, Third Party Advisory
- https://www.l9group.com/advisories/remote-denial-of-service-of-ecobee3-liteExploit, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.