high
7.7
CWE
77
Advisory Published
Updated
Advisory Published

CVE-2020-27867: NETGEAR Multiple Routers mini_httpd Command Injection Remote Code Execution Vulnerability

First published: Fri Feb 12 2021(Updated: )

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.

Credit: zdi-disclosures@trendmicro.com

Affected SoftwareAffected VersionHow to fix
Netgear Ac2100 Firmware<1.2.0.76
Netgear Ac2100
Netgear Ac2400 Firmware<1.2.0.76
Netgear Ac2400
Netgear Ac2600 Firmware<1.2.0.76
Netgear Ac2600
Netgear R6700 Firmware<1.2.0.76
NETGEAR R6700=v2
Netgear R6800 Firmware<1.2.0.76
Netgear R6800
Netgear R6900 Firmware<1.2.0.76
Netgear R6900=v2
Netgear R7200 Firmware<1.2.0.76
Netgear R7200
Netgear R7350 Firmware<1.2.0.76
Netgear R7350
Netgear R7400 Firmware<1.2.0.76
Netgear R7400
Netgear R7450 Firmware<1.2.0.76
NETGEAR R7450
Netgear R6220 Firmware<1.1.0.104
NETGEAR R6220
Netgear R6230 Firmware<1.1.0.104
Netgear R6230
Netgear R6260 Firmware<1.1.0.78
NETGEAR R6260
Netgear R6330 Firmware<1.1.0.78
Netgear R6330
Netgear R6350 Firmware<1.1.0.78
Netgear R6350
Netgear R6850 Firmware<1.1.0.78
Netgear R6850
Netgear R6120 Firmware<1.0.0.76
NETGEAR R6120
Netgear R6020 Firmware<1.0.0.48
NETGEAR R6020
Netgear R6080 Firmware<1.0.0.48
Netgear R6080
NETGEAR Multiple Routers

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Reference Links

Frequently Asked Questions

  • What is CVE-2020-27867?

    CVE-2020-27867 is a command injection vulnerability in NETGEAR Multiple Routers that allows network-adjacent attackers to execute arbitrary code on affected installations.

  • Which routers are affected by CVE-2020-27867?

    The routers affected by CVE-2020-27867 include NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400.

  • Is authentication required to exploit CVE-2020-27867?

    Yes, authentication is required to exploit CVE-2020-27867.

  • What is the severity of CVE-2020-27867?

    CVE-2020-27867 has a severity score of 6.8, which is considered high.

  • How can I fix CVE-2020-27867?

    To fix CVE-2020-27867, it is recommended to update the firmware of the affected routers to a version that includes the security patch from NETGEAR.

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