#VU58448 Small Space of Random Values in eufyCam 2 - CVE-2021-21955

Vulnerability identifier: #VU58448

Vulnerability risk: Medium

CVSSv4.0: 5 [CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:L/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-21955

CWE-ID: N/A

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
eufyCam 2
Hardware solutions / Security hardware applicances

Vendor: Eufy

Description

The vulnerability allows a remote attacker to bypass authentication on the target system.

The vulnerability exists due to improper authentication in the "get_aes_key_info_by_packetid()" function of the home_security binary. A remote attacker can recovery the password and bypass authentication.

Mitigation
Install updates from vendor's website.

Vulnerable software versions

eufyCam 2: 2.1.6.9h

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External links
https://www.talosintelligence.com/vulnerability_reports/TALOS-2021-1382

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Q & A

Can this vulnerability be exploited remotely?

Yes. This vulnerability can be exploited by a remote non-authenticated attacker via the Internet.

Is there known malware, which exploits this vulnerability?

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