high
7.2
CWE
120 119
Advisory Published
Updated

CVE-2018-21156: Buffer Overflow

First published: Mon Apr 27 2020(Updated: )

Certain NETGEAR devices are affected by a buffer overflow by an authenticated user. This affects D6220 before 1.0.0.38, D6400 before 1.0.0.74, D7000v2 before 1.0.0.74, D8500 before 1.0.3.39, DGN2200v4 before 1.0.0.102, DGN2200Bv4 before 1.0.0.102, EX3700 before 1.0.0.70, EX3800 before 1.0.0.70, EX6000 before 1.0.0.30, EX6100 before 1.0.2.22, EX6120 before 1.0.0.40, EX6130 before 1.0.0.22, EX6150 before 1.0.0.38, EX6200 before 1.0.3.86, EX7000 before 1.0.0.64, R6250 before 1.0.4.20, R6300v2 before 1.0.4.22, R6400 before 1.0.1.32, R6400v2 before 1.0.2.52, R6700 before 1.0.1.44, R6900 before 1.0.1.44, R6900P before 1.3.0.18, R7000 before 1.0.9.28, R7000P before 1.3.0.18, R7300DST before 1.0.0.62, R7900 before 1.0.2.10, R7900P before 1.3.0.10, R8000 before 1.0.4.12, R8000P before 1.3.0.10, R8300 before 1.0.2.116, R8500 before 1.0.2.116, WN2500RPv2 before 1.0.1.52, WNDR3400v3 before 1.0.1.18, and WNR3500Lv2 before 1.2.0.46.

Credit: cve@mitre.org

Affected SoftwareAffected VersionHow to fix
Netgear D6220 Firmware<1.0.0.38
NETGEAR D6220 firmware
NETGEAR D6400<1.0.0.74
NETGEAR D6400 firmware
NETGEAR D7000v1 firmware<1.0.0.74
NETGEAR D7000 firmware=v2
Netgear D8500 Firmware<1.0.3.39
Netgear D8500 Firmware
NETGEAR DGN2200B firmware<1.0.0.102
NETGEAR DGN2200M=v4
NETGEAR DGND2200B firmware<1.0.0.102
NETGEAR DGND2200B firmware=v4
Netgear EX3700<1.0.0.70
Netgear EX3700
NETGEAR EX3800 firmware<1.0.0.70
NETGEAR EX3800 firmware
NETGEAR EX6000<1.0.0.30
NETGEAR EX6000
Netgear EX6100<1.0.2.22
Netgear EX6100
NETGEAR EX6120 firmware<1.0.0.40
Netgear EX6120
NETGEAR EX6130<1.0.0.22
NETGEAR EX6130
NETGEAR EX6150<1.0.0.38
NETGEAR EX6150v2
NETGEAR EX6200<1.0.3.86
NETGEAR EX6200v1
NETGEAR EX7000 firmware<1.0.0.64
NETGEAR EX7000 firmware
Netgear R6250 Firmware<1.0.4.20
NETGEAR R6250
NETGEAR R6300 firmware<1.0.4.22
NETGEAR R6300 firmware=v2
NETGEAR R6400 firmware<1.0.1.32
NETGEAR R6400 firmware
NETGEAR R6400 firmware<1.0.2.52
NETGEAR R6400 firmware=v2
NETGEAR R6700 firmware<1.0.1.44
NETGEAR R6700v1 firmware
Netgear R6900 Firmware<1.0.1.44
Netgear R6900 Firmware
NETGEAR R6900P firmware<1.3.0.18
Netgear R6900 Firmware
Netgear Nighthawk R7000 Firmware<1.0.9.28
NETGEAR Nighthawk R7000
NETGEAR R7000P firmware<1.3.0.18
Netgear Routers
NETGEAR R7300DST firmware<1.0.0.62
NETGEAR R7300DST firmware
NETGEAR R7900P firmware<1.0.2.10
NETGEAR R7900P firmware
NETGEAR R7900P firmware<1.3.0.10
NETGEAR R7900P firmware
NETGEAR R8000 firmware<1.0.4.12
NETGEAR R8000 firmware
NETGEAR R8000P<1.3.0.10
NETGEAR R8000P firmware
NETGEAR R8300 firmware<1.0.2.116
NETGEAR R8300 firmware
NETGEAR R8500<1.0.2.116
NETGEAR R8500
NETGEAR WN2500RP<1.0.1.52
NETGEAR WN2500RPv2=v2
NETGEAR WNDR3400<1.0.1.18
NETGEAR WNDR3400 firmware=v3
NETGEAR WNR3500L<1.2.0.46
NETGEAR WNR3500L firmware=v2

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Reference Links

Frequently Asked Questions

  • What is the severity of CVE-2018-21156?

    CVE-2018-21156 is classified as a high severity vulnerability due to its potential for remote code execution via a buffer overflow.

  • How do I fix CVE-2018-21156?

    To fix CVE-2018-21156, update the affected NETGEAR devices to the latest firmware versions that patch this vulnerability.

  • Which NETGEAR devices are affected by CVE-2018-21156?

    CVE-2018-21156 affects several NETGEAR devices including D6220, D6400, D7000V2, D8500, DGN2200V4, EX3700, and EX3800 among others.

  • Can CVE-2018-21156 be exploited remotely?

    Yes, CVE-2018-21156 can be exploited by an authenticated user with access to the device to execute arbitrary code remotely.

  • What type of vulnerability is CVE-2018-21156?

    CVE-2018-21156 is a buffer overflow vulnerability that arises when a device does not properly validate input data leading to memory corruption.

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