7.5
HIGH
CVE-2021-33820
"UniFi Protect G3 FLEX Camera TCP SYN Flooding Vulnerability"
Description

An issue was discovered in UniFi Protect G3 FLEX Camera Version UVC.v4.30.0.67.Attacker could send a huge amount of TCP SYN packet to make web service's resource exhausted. Then the web server is denial-of-service.

INFO

Published Date :

June 18, 2021, 7:15 p.m.

Last Modified :

Nov. 21, 2024, 6:09 a.m.

Remotely Exploitable :

Yes !

Impact Score :

3.6

Exploitability Score :

3.9
Public PoC/Exploit Available at Github

CVE-2021-33820 has a 1 public PoC/Exploit available at Github. Go to the Public Exploits tab to see the list.

Affected Products

The following products are affected by CVE-2021-33820 vulnerability. Even if cvefeed.io is aware of the exact versions of the products that are affected, the information is not represented in the table below.

ID Vendor Product Action
1 Ui camera_g3_flex_firmware
2 Ui camera_g3_flex
References to Advisories, Solutions, and Tools

Here, you will find a curated list of external links that provide in-depth information, practical solutions, and valuable tools related to CVE-2021-33820.

URL Resource
https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33820.md Exploit Third Party Advisory
https://linuxhint.com/hping3/ Third Party Advisory
https://store.ui.com/collections/unifi-protect-cameras/products/unifi-video-g3-flex-camera Product Vendor Advisory
https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33820.md Exploit Third Party Advisory
https://linuxhint.com/hping3/ Third Party Advisory
https://store.ui.com/collections/unifi-protect-cameras/products/unifi-video-g3-flex-camera Product Vendor Advisory

We scan GitHub repositories to detect new proof-of-concept exploits. Following list is a collection of public exploits and proof-of-concepts, which have been published on GitHub (sorted by the most recently updated).

None

Updated: 5 months, 1 week ago
10 stars 3 fork 3 watcher
Born at : Feb. 28, 2020, 5:47 p.m. This repo has been linked 8 different CVEs too.

Results are limited to the first 15 repositories due to potential performance issues.

The following list is the news that have been mention CVE-2021-33820 vulnerability anywhere in the article.

The following table lists the changes that have been made to the CVE-2021-33820 vulnerability over time.

Vulnerability history details can be useful for understanding the evolution of a vulnerability, and for identifying the most recent changes that may impact the vulnerability's severity, exploitability, or other characteristics.

  • CVE Modified by af854a3a-2127-422b-91ae-364da2661108

    Nov. 21, 2024

    Action Type Old Value New Value
    Added Reference https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33820.md
    Added Reference https://linuxhint.com/hping3/
    Added Reference https://store.ui.com/collections/unifi-protect-cameras/products/unifi-video-g3-flex-camera
  • CVE Modified by [email protected]

    May. 14, 2024

    Action Type Old Value New Value
  • CWE Remap by [email protected]

    Jul. 12, 2022

    Action Type Old Value New Value
    Changed CWE CWE-400 NVD-CWE-noinfo
  • Initial Analysis by [email protected]

    Jun. 24, 2021

    Action Type Old Value New Value
    Added CVSS V2 NIST (AV:N/AC:L/Au:N/C:N/I:N/A:P)
    Added CVSS V3.1 NIST AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
    Changed Reference Type https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33820.md No Types Assigned https://github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33820.md Exploit, Third Party Advisory
    Changed Reference Type https://linuxhint.com/hping3/ No Types Assigned https://linuxhint.com/hping3/ Third Party Advisory
    Changed Reference Type https://store.ui.com/collections/unifi-protect-cameras/products/unifi-video-g3-flex-camera No Types Assigned https://store.ui.com/collections/unifi-protect-cameras/products/unifi-video-g3-flex-camera Product, Vendor Advisory
    Added CWE NIST CWE-400
    Added CPE Configuration AND OR *cpe:2.3:o:ui:camera_g3_flex_firmware:uvc.v4.30.0.67:*:*:*:*:*:*:* OR cpe:2.3:h:ui:camera_g3_flex:-:*:*:*:*:*:*:*
EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days. Following chart shows the EPSS score history of the vulnerability.
CWE - Common Weakness Enumeration

While CVE identifies specific instances of vulnerabilities, CWE categorizes the common flaws or weaknesses that can lead to vulnerabilities. CVE-2021-33820 is associated with the following CWEs:

Common Attack Pattern Enumeration and Classification (CAPEC)

Common Attack Pattern Enumeration and Classification (CAPEC) stores attack patterns, which are descriptions of the common attributes and approaches employed by adversaries to exploit the CVE-2021-33820 weaknesses.

Exploit Prediction

EPSS is a daily estimate of the probability of exploitation activity being observed over the next 30 days.

0.24 }} 0.03%

score

0.63641

percentile

CVSS31 - Vulnerability Scoring System
Attack Vector
Attack Complexity
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Scope
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