Auth bypass in Open5gs
CVE-2021-28122
A request-validation issue was discovered in Open5GS 2.1.3 through 2.2.x before 2.2.1. The WebUI component allows an unauthenticated user to use a crafted HTTP API request to create, read, update, or delete entries in the subscriber database. For example, new administrative users can be added. The issue occurs because Express is not set up to require authentication.
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
EPSS: 0.040 (90.2th percentile), scored .
Low probability of exploitation in the next 30 days, but still tracked. 90th percentile — 90.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.040 · newest: 0.040 · change: 0.000
Affected products
Weakness classification (CWE)
References
- github.com/open5gs/open5gs/releases (Third Party Advisory, Release Notes)
- github.com/open5gs/open5gs/issues/837 (Exploit, Third Party Advisory)
- github.com/open5gs/open5gs/pull/838 (Patch, Third Party Advisory)
- github.com/open5gs/open5gs/compare/v2.2.0...v2.2.1 (Patch, Third Party Advisory)
Frequently asked questions
- What is CVE-2021-28122?
- CVE-2021-28122 is a critical-severity vulnerability in Open5gs, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2021-03-10.
- How severe is CVE-2021-28122?
- Critical severity. CVSS v3 base score is 9.8 out of 10.