CVE-2020-27867 Information

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 Vector

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

Reference

https://www.zerodayinitiative.com/advisories/ZDI-20-1423/ https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

UNCHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

6.8