CVE Vulnerabilities

CVE-2020-27866

Authentication Bypass Using an Alternate Path or Channel

Published: Feb 12, 2021 | Modified: Mar 26, 2021
CVSS 3.x
8.8
HIGH
Source:
NVD
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CVSS 2.x
8.3 HIGH
AV:A/AC:L/Au:N/C:C/I:C/A:C
RedHat/V2
RedHat/V3
Ubuntu

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.

Weakness

A product requires authentication, but the product has an alternate path or channel that does not require authentication.

Affected Software

Name Vendor Start Version End Version
Ac2100_firmware Netgear * 1.2.0.76 (excluding)

Potential Mitigations

References