CVE-2020-27866

Published: Feb 12, 2021Modified: Nov 21, 2024

8.8

Vector

CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Exploitability: 2.8 / Impact: 5.9

Source: NVD

Description

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.

Affected (19)

Products: Netgear: Ac2100 Firmware, Ac2400 Firmware, Ac2600 Firmware, R6700 Firmware, R6800 Firmware, R6900 Firmware, R7200 Firmware, R7350 Firmware, R7400 Firmware, R7450 Firmware, R6220 Firmware, R6230 Firmware, R6260 Firmware, R6330 Firmware, R6350 Firmware, R6850 Firmware, R6120 Firmware, R6020 Firmware, R6080 Firmware

Configuration A

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Ac2100 Firmware	Before 1.2.0.76

Running on/with	Platform Versions
Netgear Ac2100	All versions

Configuration B

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Ac2400 Firmware	Before 1.2.0.76

Running on/with	Platform Versions
Netgear Ac2400	All versions

Configuration C

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear Ac2600 Firmware	Before 1.2.0.76

Running on/with	Platform Versions
Netgear Ac2600	All versions

Configuration D

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6700 Firmware	Before 1.2.0.76

Running on/with	Platform Versions
Netgear R6700	Version v2

Configuration E

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6800 Firmware	Before 1.2.0.76

Running on/with	Platform Versions
Netgear R6800	All versions

Configuration F

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6900 Firmware	Before 1.2.0.76

Running on/with	Platform Versions
Netgear R6900	Version v2

Configuration G

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R7200 Firmware	Before 1.2.0.76

Running on/with	Platform Versions
Netgear R7200	All versions

Configuration H

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R7350 Firmware	Before 1.2.0.76

Running on/with	Platform Versions
Netgear R7350	All versions

Configuration I

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R7400 Firmware	Before 1.2.0.76

Running on/with	Platform Versions
Netgear R7400	All versions

Configuration J

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R7450 Firmware	Before 1.2.0.76

Running on/with	Platform Versions
Netgear R7450	All versions

Configuration K

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6220 Firmware	Before 1.1.0.104

Running on/with	Platform Versions
Netgear R6220	All versions

Configuration L

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6230 Firmware	Before 1.1.0.104

Running on/with	Platform Versions
Netgear R6230	All versions

Configuration M

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6260 Firmware	Before 1.1.0.78

Running on/with	Platform Versions
Netgear R6260	All versions

Configuration N

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6330 Firmware	Before 1.1.0.78

Running on/with	Platform Versions
Netgear R6330	All versions

Configuration O

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6350 Firmware	Before 1.1.0.78

Running on/with	Platform Versions
Netgear R6350	All versions

Configuration P

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6850 Firmware	Before 1.1.0.78

Running on/with	Platform Versions
Netgear R6850	All versions

Configuration Q

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6120 Firmware	Before 1.0.0.76

Running on/with	Platform Versions
Netgear R6120	All versions

Configuration R

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6020 Firmware	Before 1.0.0.48

Running on/with	Platform Versions
Netgear R6020	All versions

Configuration S

1 vulnerable · 1 platform

Vulnerable Software	Affected Versions
Netgear R6080 Firmware	Before 1.0.0.48

Running on/with	Platform Versions
Netgear R6080	All versions

Related CWEs

CWE-287

Improper Authentication

When an actor claims to have a given identity, the product does not prove or insufficiently proves that the claim is correct.

CWE-288

Authentication Bypass Using an Alternate Path or Channel

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

References (4)

https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers

Source: zdi-disclosures@trendmicro.com

Vendor Advisory

https://www.zerodayinitiative.com/advisories/ZDI-20-1451/

Source: zdi-disclosures@trendmicro.com

Third Party AdvisoryVDB Entry

https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers

Source: af854a3a-2127-422b-91ae-364da2661108

Vendor Advisory

https://www.zerodayinitiative.com/advisories/ZDI-20-1451/

Source: af854a3a-2127-422b-91ae-364da2661108

Third Party AdvisoryVDB Entry

Timeline

No history available yet.