CVE-2021-33818: ui camera_g3_flex_firmware Uncontrolled Resource Consumption
Vulnerability summary
CVE-2021-33818 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in ui camera_g3_flex_firmware. EPSS estimates a 1.93% chance of exploitation in the next 30 days, higher than 79.7% of scored vulnerabilities. 1 public exploit is recorded.
Timeline
- 18-06-2021PublishedVulnerability first disclosed.
- 03-08-2024Last modifiedVulnerability information updated.
Description
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.
CVSS metrics
2 scores · 1 source · 2 versionsEPSS trend
Probability
1.93%
Chance of exploitation in the next 30 days
Percentile
80%
Versus all other CVEs
30-day change
0.00 pp
From 1.93% on 20-09-2026
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
1 foundCve Poc
Maturity: poc
Weaknesses
CWE · root causeAffected systems
Ui1 product
- camera_g3_flex_firmwareuvc.v4.30.0.67
1 vendor · 1 product
References
3 links- store.ui.com/collections/unifi-protect-cameras/products/unifi-video-g3-flex-cameraX Refsource MISCProductVendor Advisory
- github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33818.mdX Refsource MISCExploitThird Party Advisory