What is CVE-2020-35757?

CVE-2020-35757 is a critical-severity vulnerability in Librewireless Ls9, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2021-05-03.

How severe is CVE-2020-35757?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Librewireless Ls9

CVE-2020-35757

An issue was discovered on Libre Wireless LS9 LS1.5/p7040 devices. There is Unauthenticated Root ADB Access Over TCP. The LS9 web interface provides functionality to access ADB over TCP. This is not enabled by default, but can be enabled by sending a crafted request to a web management interface endpoint. Requests made to this endpoint do not require authentication. As such, any unauthenticated user who is able to access the web interface will be able to gain root privileges on the LS9 module.

Vulnerability class: Broken Authentication

EPSS: 0.018 (76.3th percentile) — read the EPSS interpretation.

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.

Affected products

Librewireless Ls9
Librewireless Ls9_firmware — versions 7040
N/a — versions n/a

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

cve@mitre.org (Exploit, Third Party Advisory, x_refsource_MISC)

Frequently asked questions

What is CVE-2020-35757?: CVE-2020-35757 is a critical-severity vulnerability in Librewireless Ls9, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2021-05-03.
How severe is CVE-2020-35757?: Critical severity. CVSS v3 base score is 9.8 out of 10.