CVE-2017-18776

Vulnerability

An authentication bypass vulnerability exists in multiple NETGEAR routers and gateways. Affected devices include D6100 before V1.0.0.55, D7000 before V1.0.1.50, D7800 before V1.0.1.24, JNR1010v2 before 1.1.0.40, JWNR2010v5 before 1.1.0.40, R6100 before 1.0.1.12, R6220 before 1.1.0.50, R7500 before 1.0.0.108, R7500v2 before 1.0.3.10, WNDR4300v1 before 1.0.2.88, WNDR4300v2 before 1.0.0.48, WNDR4500v3 before 1.0.0.48, WNR1000v4 before 1.1.0.40, WNR2000v5 before 1.0.0.42, WNR2020 before 1.1.0.40, and WNR2050 before 1.1.0.40 [1]. The specific code path and conditions for exploitation are not disclosed.

Exploitation

An attacker can exploit this vulnerability to bypass authentication mechanisms on the affected devices. The advisory does not specify required network position or user interaction, but given the nature of authentication bypass, it is likely exploitable remotely without credentials [1].

Impact

Successful exploitation allows an attacker to bypass authentication and gain unauthorized access to the device's administrative interface or other protected functions. This could lead to full compromise of the device's settings and network [1].

Mitigation

NETGEAR has released firmware updates to fix this vulnerability. Users should update to the following versions or later: D6100 V1.0.0.55, D7000 V1.0.1.50, D7800 V1.0.1.24, JNR1010v2 1.1.0.40, JWNR2010v5 1.1.0.40, R6100 1.0.1.12, R6220 1.1.0.50, R7500 1.0.0.108, R7500v2 1.0.3.10, WNDR4300v1 1.0.2.88, WNDR4300v2 1.0.0.48, WNDR4500v3 1.0.0.48, WNR1000v4 1.1.0.40, WNR2000v5 1.0.0.42, WNR2020 1.1.0.40, and WNR2050 1.1.0.40 [1]. No workarounds are provided; updating firmware is the recommended action.