PT-2021-6476 · NetGear · Netgear R7000+6

0Xmitsurugi

+3

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Published

2021-12-01

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Updated

2023-04-06

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CVE-2022-27646

CVSS v3.1

8.8

High

VectorAV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Name of the Vulnerable Software and Affected Versions NETGEAR R6400v2 (affected versions not specified) NETGEAR R6700v3 version 1.0.4.120 10.0.91 NETGEAR R6900P (affected versions not specified) NETGEAR R7000 (affected versions not specified) NETGEAR R7000P (affected versions not specified) NETGEAR RS400 (affected versions not specified) NETGEAR CBR40 (affected versions not specified)
Description This issue allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR routers. Although authentication is required to exploit this issue, the existing authentication mechanism can be bypassed. The specific flaw exists within the circled daemon. A crafted circleinfo.txt file can trigger an overflow of a fixed-length stack-based buffer. An attacker can leverage this issue to execute code in the context of root.
Recommendations For NETGEAR R6400v2, restrict access to the circled daemon until a patch is available. For NETGEAR R6700v3 version 1.0.4.120 10.0.91, consider disabling the circled daemon as a temporary workaround. For NETGEAR R6900P, NETGEAR R7000, NETGEAR R7000P, NETGEAR RS400, and NETGEAR CBR40, at the moment, there is no information about a newer version that contains a fix for this issue.

Exploit

Fix

Stack Overflow

Weakness Enumeration

CWE-121

Related Identifiers

BDU:2022-01718
CVE-2022-27646
ZDI-22-523

Affected Products

Netgear Cbr40
Netgear R6400V2
Netgear R6700V3
Netgear R6900P
Netgear R7000
Netgear R7000P
Netgear Rs400