CVE-2018-21156 : Certain NETGEAR devices are affected by a buffer overflow by an authenticated us

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.

Published 2020-04-27 18:15:12

Updated 2020-05-05 19:55:29

Source MITRE

View at NVD, CVE.org

Vulnerability category: Overflow

Products affected by CVE-2018-21156

Netgear » R6400 Firmware
Versions before (<) 1.0.1.32
cpe:2.3:o:netgear:r6400_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R6400 » Version: N/A
Netgear » R6400 Firmware
Versions before (<) 1.0.2.52
cpe:2.3:o:netgear:r6400_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R6400 » Version: V2
Netgear » R6700 Firmware
Versions before (<) 1.0.1.44
cpe:2.3:o:netgear:r6700_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R6700 » Version: N/A
Netgear » R6900 Firmware
Versions before (<) 1.0.1.44
cpe:2.3:o:netgear:r6900_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R6900 » Version: N/A
Netgear » R7000 Firmware
Versions before (<) 1.0.9.28
cpe:2.3:o:netgear:r7000_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R7000 » Version: N/A
Netgear » R7300dst Firmware
Versions before (<) 1.0.0.62
cpe:2.3:o:netgear:r7300dst_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R7300dst » Version: N/A
Netgear » R7900 Firmware
Versions before (<) 1.0.2.10
cpe:2.3:o:netgear:r7900_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R7900 » Version: N/A
Netgear » R8000 Firmware
Versions before (<) 1.0.4.12
cpe:2.3:o:netgear:r8000_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R8000 » Version: N/A
Netgear » D6220 Firmware
Versions before (<) 1.0.0.38
cpe:2.3:o:netgear:d6220_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » D6220 » Version: N/A
Netgear » D6400 Firmware
Versions before (<) 1.0.0.74
cpe:2.3:o:netgear:d6400_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » D6400 » Version: N/A
Netgear » R6250 Firmware
Versions before (<) 1.0.4.20
cpe:2.3:o:netgear:r6250_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R6250 » Version: N/A
Netgear » R6300 Firmware
Versions before (<) 1.0.4.22
cpe:2.3:o:netgear:r6300_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R6300 » Version: V2
Netgear » Dgn2200 Firmware
Versions before (<) 1.0.0.102
cpe:2.3:o:netgear:dgn2200_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » Dgn2200 » Version: V4
Netgear » Ex7000 Firmware
Versions before (<) 1.0.0.64
cpe:2.3:o:netgear:ex7000_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » Ex7000 » Version: N/A
Netgear » Wnr3500l Firmware
Versions before (<) 1.2.0.46
cpe:2.3:o:netgear:wnr3500l_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » Wnr3500l » Version: V2
Netgear » Dgn2200b Firmware
Versions before (<) 1.0.0.102
cpe:2.3:o:netgear:dgn2200b_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » Dgn2200b » Version: V4
Netgear » Wndr3400 Firmware
Versions before (<) 1.0.1.18
cpe:2.3:o:netgear:wndr3400_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » Wndr3400 » Version: V3
Netgear » D7000 Firmware
Versions before (<) 1.0.0.74
cpe:2.3:o:netgear:d7000_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » D7000 » Version: V2
Netgear » R8300 Firmware
Versions before (<) 1.0.2.116
cpe:2.3:o:netgear:r8300_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R8300 » Version: N/A
Netgear » R8500 Firmware
Versions before (<) 1.0.2.116
cpe:2.3:o:netgear:r8500_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R8500 » Version: N/A
Netgear » Ex6150 Firmware
Versions before (<) 1.0.0.38
cpe:2.3:o:netgear:ex6150_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » Ex6150 » Version: N/A
Netgear » R7000p Firmware
Versions before (<) 1.3.0.18
cpe:2.3:o:netgear:r7000p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R7000p » Version: N/A
Netgear » R6900p Firmware
Versions before (<) 1.3.0.18
cpe:2.3:o:netgear:r6900p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R6900p » Version: N/A
Netgear » Ex3700 Firmware
Versions before (<) 1.0.0.70
cpe:2.3:o:netgear:ex3700_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » Ex3700 » Version: N/A
Netgear » Ex3800 Firmware
Versions before (<) 1.0.0.70
cpe:2.3:o:netgear:ex3800_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » Ex3800 » Version: N/A
Netgear » Ex6100 Firmware
Versions before (<) 1.0.2.22
cpe:2.3:o:netgear:ex6100_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » Ex6100 » Version: N/A
Netgear » Ex6120 Firmware
Versions before (<) 1.0.0.40
cpe:2.3:o:netgear:ex6120_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » Ex6120 » Version: N/A
Netgear » Ex6200 Firmware
Versions before (<) 1.0.3.86
cpe:2.3:o:netgear:ex6200_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » Ex6200 » Version: N/A
Netgear » D8500 Firmware
Versions before (<) 1.0.3.39
cpe:2.3:o:netgear:d8500_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » D8500 » Version: N/A
Netgear » Ex6130 Firmware
Versions before (<) 1.0.0.22
cpe:2.3:o:netgear:ex6130_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » Ex6130 » Version: N/A
Netgear » Ex6000 Firmware
Versions before (<) 1.0.0.30
cpe:2.3:o:netgear:ex6000_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » Ex6000 » Version: N/A
Netgear » Wn2500rp Firmware
Versions before (<) 1.0.1.52
cpe:2.3:o:netgear:wn2500rp_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » Wn2500rp » Version: V2
Netgear » R7900p Firmware
Versions before (<) 1.3.0.10
cpe:2.3:o:netgear:r7900p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R7900p » Version: N/A
Netgear » R8000p Firmware
Versions before (<) 1.3.0.10
cpe:2.3:o:netgear:r8000p_firmware:*:*:*:*:*:*:*:*
Matching versions
When used together with: Netgear » R8000p » Version: N/A

Exploit prediction scoring system (EPSS) score for CVE-2018-21156

EPSS FAQ

0.10%

Probability of exploitation activity in the next 30 days EPSS Score History

~ 39 %

Percentile, the proportion of vulnerabilities that are scored at or less

CVSS scores for CVE-2018-21156

Base Score	Base Severity	CVSS Vector	Exploitability Score	Impact Score	Score Source
6.5	MEDIUM	AV:N/AC:L/Au:S/C:P/I:P/A:P	8.0	6.4	NIST
Access Vector: Network Access Complexity: Low Authentication: Single Confidentiality Impact: Partial Integrity Impact: Partial Availability Impact: Partial
6.8	MEDIUM	CVSS:3.0/AV:A/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	0.9	5.9	MITRE
Attack Vector: Adjacent Network Attack Complexity: Low Privileges Required: High User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High
7.2	HIGH	CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H	1.2	5.9	NIST
Attack Vector: Network Attack Complexity: Low Privileges Required: High User Interaction: None Scope: Unchanged Confidentiality: High Integrity: High Availability: High

CWE ids for CVE-2018-21156

CWE-120 Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

The product copies an input buffer to an output buffer without verifying that the size of the input buffer is less than the size of the output buffer, leading to a buffer overflow.

Assigned by: nvd@nist.gov (Primary)

References for CVE-2018-21156

https://kb.netgear.com/000059474/Security-Advisory-for-Post-Authentication-Buffer-Overflow-on-Some-Gateways-Routers-and-Extenders-PSV-2017-2460

Security Advisory for Post-Authentication Buffer Overflow on Some Gateways, Routers, and Extenders, PSV-2017-2460 | Answer | NETGEAR Support
Vendor Advisory

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Vulnerability Details : CVE-2018-21156

Products affected by CVE-2018-21156

Exploit prediction scoring system (EPSS) score for CVE-2018-21156

CVSS scores for CVE-2018-21156

CWE ids for CVE-2018-21156

References for CVE-2018-21156