PT-2021-20334 · Ubiquiti · Unifi Protect G3 Flex Camera

Guan Yu Lai + 2 · Published 2021-06-18 · Updated 2022-07-12 · CVE-2021-33820

Positive Technologies (AI Summary)

CVSS v3.1

7.5

High

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Name of the Vulnerable Software and Affected Versions: UniFi Protect G3 FLEX Camera version UVC.v4.30.0.67

Description: An issue was discovered where an attacker could send a large amount of TCP SYN packets to exhaust the web service's resources, resulting in a denial-of-service.

Recommendations: For UniFi Protect G3 FLEX Camera version UVC.v4.30.0.67, consider restricting access to the web server to minimize the risk of exploitation. As a temporary workaround, implement rate limiting on TCP SYN packets to prevent resource exhaustion. At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Exploit

Related Identifiers

CVE-2021-33820

Affected Products

Unifi Protect G3 Flex Camera

References · 6

• 🔥 https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33820.md · Exploit
• https://store.ui.com/collections/unifi-protect-cameras/products/unifi-video-g3-flex-camera · Vendor Advisory
• https://osv.dev/vulnerability/CVE-2021-33820 · Vendor Advisory
• https://nvd.nist.gov/vuln/detail/CVE-2021-33820 · Security Note
• https://t.me/cvenotify/16551 · Telegram Post
• https://linuxhint.com/hping3 · Note