Resource exhaustion in Ui Camera G3 Flex
CVE-2021-33818
An issue was discovered in UniFi Protect G3 FLEX Camera Version UVC.v4.30.0.67. Attackers can use slowhttptest tool to send incomplete HTTP request, which could make server keep waiting for the packet to finish the connection, until its resource exhausted. Then the web server is denial-of-service.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.019 (79.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.019 · newest: 0.019 · change: 0.000
Affected products
- Ui Camera G3 Flex
- Ui Camera G3 Flex Firmware — versions uvc.v4.30.0.67
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/shekyan/slowhttptest (Third Party Advisory)
- store.ui.com/collections/unifi-protect-cameras/products/unifi-video-g3-flex-cam… (Product, Vendor Advisory)
- github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33818.md (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-33818?
- CVE-2021-33818 is a high-severity vulnerability in Ui Camera G3 Flex, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2021-06-18.
- How severe is CVE-2021-33818?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-33818 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.