CVE-2020-27867

Description

This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. When parsing the funjsq_access_token parameter, the process does not properly validate a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-11653.

CVSS 3.1

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

EPSS

2.23% probability · 82th percentile

CISA KEV

Not listed

Weakness

CWE-77

Affected

netgear/ac2100 firmware · netgear/ac2400 firmware · netgear/ac2600 firmware · netgear/r6700 firmware · netgear/r6800 firmware · netgear/r6900 firmware · netgear/r7200 firmware · netgear/r7350 firmware · netgear/r7400 firmware · netgear/r7450 firmware · netgear/r6220 firmware · netgear/r6230 firmware · netgear/r6260 firmware · netgear/r6330 firmware · netgear/r6350 firmware · netgear/r6850 firmware · netgear/r6120 firmware · netgear/r6020 firmware · netgear/r6080 firmware

Source

zdi-disclosures@trendmicro.com

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.