Resource exhaustion in Sing4g 4gee Router Hh70vb
CVE-2021-33822
An issue was discovered on 4GEE ROUTER HH70VB Version HH70_E1_02.00_22. 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 (79.3th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 79th percentile — 79.3% 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
- Sing4g 4gee Router Hh70vb
- Sing4g 4gee Router Hh70vb Firmware — versions hh70_e1_02.00_22
Weakness classification (CWE)
Public proof-of-concept exploits
References
- github.com/shekyan/slowhttptest (Third Party Advisory)
- www.sing4g.com/product-page/4gee-router-hh70vb-4g-300mbps-2lan-32wifi (Product, Vendor Advisory)
- github.com/Jian-Xian/CVE-POC/blob/master/CVE-2021-33822.md (Exploit, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-33822?
- CVE-2021-33822 is a high-severity vulnerability in Sing4g 4gee Router Hh70vb, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2021-06-18.
- How severe is CVE-2021-33822?
- High severity. CVSS v3 base score is 7.5 out of 10.
- Is CVE-2021-33822 known to be exploited?
- 1 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.