The update process of the Circle Parental Control Service on various NETGEAR routers allows remote attackers to achieve remote code execution as root via a MitM attack. While the parental controls themselves are not enabled by default on the routers, the Circle update daemon, circled, is enabled by default. This daemon connects to Circle and NETGEAR to obtain version information and updates to the circled daemon and its filtering database. However, database updates from NETGEAR are unsigned and downloaded via cleartext HTTP. As such, an attacker with the ability to perform a MitM attack on the device can respond to circled update requests with a crafted, compressed database file, the extraction of which gives the attacker the ability to overwrite executable files with attacker-controlled code. This affects R6400v2 1.0.4.106, R6700 1.0.2.16, R6700v3 1.0.4.106, R6900 1.0.2.16, R6900P 1.3.2.134, R7000 1.0.11.123, R7000P 1.3.2.134, R7850 1.0.5.68, R7900 1.0.4.38, R8000 1.0.4.68, and RS400 1.5.0.68.
Project Subscriptions
| Vendors | Products |
|---|---|
|
Netgear
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|
R6400v2
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R6400v2 Firmware
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R6700
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R6700 Firmware
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R6700v3
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R6700v3 Firmware
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R6900
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R6900 Firmware
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R6900p
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R6900p Firmware
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R7000
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R7000 Firmware
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R7000p
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R7000p Firmware
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R7850
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R7850 Firmware
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R7900
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R7900 Firmware
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R8000
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R8000 Firmware
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Rs400
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Rs400 Firmware
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|
Advisories
| Source | ID | Title |
|---|---|---|
EUVD |
EUVD-2021-28003 | The update process of the Circle Parental Control Service on various NETGEAR routers allows remote attackers to achieve remote code execution as root via a MitM attack. While the parental controls themselves are not enabled by default on the routers, the Circle update daemon, circled, is enabled by default. This daemon connects to Circle and NETGEAR to obtain version information and updates to the circled daemon and its filtering database. However, database updates from NETGEAR are unsigned and downloaded via cleartext HTTP. As such, an attacker with the ability to perform a MitM attack on the device can respond to circled update requests with a crafted, compressed database file, the extraction of which gives the attacker the ability to overwrite executable files with attacker-controlled code. This affects R6400v2 1.0.4.106, R6700 1.0.2.16, R6700v3 1.0.4.106, R6900 1.0.2.16, R6900P 1.3.2.134, R7000 1.0.11.123, R7000P 1.3.2.134, R7850 1.0.5.68, R7900 1.0.4.38, R8000 1.0.4.68, and RS400 1.5.0.68. |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
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Projects
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Status: PUBLISHED
Assigner: mitre
Published:
Updated: 2024-08-04T02:51:07.774Z
Reserved: 2021-09-10T00:00:00
Link: CVE-2021-40847
No data.
Status : Modified
Published: 2021-09-21T18:15:07.377
Modified: 2024-11-21T06:24:55.017
Link: CVE-2021-40847
No data.
OpenCVE Enrichment
No data.
Weaknesses
EUVD