Vulnerability identifier: #VU16712

Vulnerability risk: Medium

CVSSv3.1: 6.6 [CVSS:3.1/AV:P/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:H/E:U/RL:O/RC:C]

CVE-ID: CVE-2018-3920

CWE-ID: CWE-20

Exploitation vector: Local

Exploit availability: No

Vulnerable software:
Yi Home Camera
Hardware solutions / Firmware

Vendor: YI Technology

Description
The vulnerability allows a physical attacker to execute arbitrary code on the target system.

The vulnerability exists due to an error in the firmware update functionality during insufficient sanitization of user-supplied data. A physical attacker can insert an SDcard containing 7-Zip file, trigger a CRC collision and execute arbitrary code with elevated privileges.

Successful exploitation of the vulnerability may result in system compromise.

Mitigation
Update to the latest version.

Vulnerable software versions

Yi Home Camera: 27US 1.8.7.0D

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External links
http://www.talosintelligence.com/vulnerability_reports/TALOS-2018-0584

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Q & A

Can this vulnerability be exploited remotely?

No. The attacker should have physical access to the system in order to successfully exploit this vulnerability.

Is there known malware, which exploits this vulnerability?

No. We are not aware of malware exploiting this vulnerability.