#VU54301 Resource exhaustion in Camera G3 Flex - CVE-2021-33820

Vulnerability identifier: #VU54301

Vulnerability risk: Medium

CVSSv4.0: 6.6 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:U/U:Green]

CVE-ID: CVE-2021-33820

CWE-ID: CWE-400

Exploitation vector: Network

Exploit availability: No

Vulnerable software:
Camera G3 Flex
Hardware solutions / Security hardware applicances

Vendor: Ubiquiti Networks

Description

The vulnerability allows a remote attacker to perform a denial of service (DoS) attack.

The vulnerability exists due to application does not properly control consumption of internal resources. A remote attacker can send a huge amount of TCP SYN packet, trigger resource exhaustion and perform a denial of service (DoS) attack.

Mitigation
Cybersecurity Help is currently unaware of any official solution to address this vulnerability.

Vulnerable software versions

Camera G3 Flex: UVC.v4.30.0.67

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External links
https://store.ui.com/collections/unifi-protect-cameras/products/unifi-video-g3-flex-camera
https://linuxhint.com/hping3/
https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33820.md

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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.