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Vulnerability Details :

CVE-2020-27866

Summary
Assigner-zdi
Assigner Org ID-99f1926a-a320-47d8-bbb5-42feb611262e
Published At-11 Feb, 2021 | 23:35
Updated At-04 Aug, 2024 | 16:25
Rejected At-
Credits

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.

Vendors
-
Not available
Products
-
Metrics (CVSS)
VersionBase scoreBase severityVector
Weaknesses
Attack Patterns
Solution/Workaround
References
HyperlinkResource Type
EPSS History
Score
Latest Score
-
N/A
No data available for selected date range
Percentile
Latest Percentile
-
N/A
No data available for selected date range
Stakeholder-Specific Vulnerability Categorization (SSVC)
▼Common Vulnerabilities and Exposures (CVE)
cve.org
Assigner:zdi
Assigner Org ID:99f1926a-a320-47d8-bbb5-42feb611262e
Published At:11 Feb, 2021 | 23:35
Updated At:04 Aug, 2024 | 16:25
Rejected At:
▼CVE Numbering Authority (CNA)

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.

Affected Products
Vendor
NETGEAR, Inc.NETGEAR
Product
Multiple Routers
Versions
Affected
  • firmware version 1.2.0.62_1.0.1
Problem Types
TypeCWE IDDescription
CWECWE-288CWE-288: Authentication Bypass Using an Alternate Path or Channel
Type: CWE
CWE ID: CWE-288
Description: CWE-288: Authentication Bypass Using an Alternate Path or Channel
Metrics
VersionBase scoreBase severityVector
3.08.8HIGH
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Version: 3.0
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

1sd3d of Viettel Cyber Security
Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers
x_refsource_MISC
https://www.zerodayinitiative.com/advisories/ZDI-20-1451/
x_refsource_MISC
Hyperlink: https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers
Resource:
x_refsource_MISC
Hyperlink: https://www.zerodayinitiative.com/advisories/ZDI-20-1451/
Resource:
x_refsource_MISC
▼Authorized Data Publishers (ADP)
CVE Program Container
Affected Products
Metrics
VersionBase scoreBase severityVector
Metrics Other Info
Impacts
CAPEC IDDescription
Solutions

Configurations

Workarounds

Exploits

Credits

Timeline
EventDate
Replaced By

Rejected Reason

References
HyperlinkResource
https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers
x_refsource_MISC
x_transferred
https://www.zerodayinitiative.com/advisories/ZDI-20-1451/
x_refsource_MISC
x_transferred
Hyperlink: https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers
Resource:
x_refsource_MISC
x_transferred
Hyperlink: https://www.zerodayinitiative.com/advisories/ZDI-20-1451/
Resource:
x_refsource_MISC
x_transferred
Information is not available yet
▼National Vulnerability Database (NVD)
nvd.nist.gov
Source:zdi-disclosures@trendmicro.com
Published At:12 Feb, 2021 | 00:15
Updated At:26 Mar, 2021 | 19:34

This vulnerability allows network-adjacent attackers to bypass authentication on affected installations of NETGEAR R6020, R6080, R6120, R6220, R6260, R6700v2, R6800, R6900v2, R7450, JNR3210, WNR2020, Nighthawk AC2100, and Nighthawk AC2400 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the mini_httpd service, which listens on TCP port 80 by default. The issue results from incorrect string matching logic when accessing protected pages. An attacker can leverage this in conjunction with other vulnerabilities to execute code in the context of root. Was ZDI-CAN-11355.

CISA Catalog
Date AddedDue DateVulnerability NameRequired Action
N/A
Date Added: N/A
Due Date: N/A
Vulnerability Name: N/A
Required Action: N/A
Metrics
TypeVersionBase scoreBase severityVector
Primary3.18.8HIGH
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Secondary3.08.8HIGH
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Primary2.08.3HIGH
AV:A/AC:L/Au:N/C:C/I:C/A:C
Type: Primary
Version: 3.1
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: Secondary
Version: 3.0
Base score: 8.8
Base severity: HIGH
Vector:
CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Type: Primary
Version: 2.0
Base score: 8.3
Base severity: HIGH
Vector:
AV:A/AC:L/Au:N/C:C/I:C/A:C
CPE Matches

NETGEAR, Inc.
netgear
>>ac2100_firmware>>Versions before 1.2.0.76(exclusive)
cpe:2.3:o:netgear:ac2100_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>ac2100>>-
cpe:2.3:h:netgear:ac2100:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>ac2400_firmware>>Versions before 1.2.0.76(exclusive)
cpe:2.3:o:netgear:ac2400_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>ac2400>>-
cpe:2.3:h:netgear:ac2400:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>ac2600_firmware>>Versions before 1.2.0.76(exclusive)
cpe:2.3:o:netgear:ac2600_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>ac2600>>-
cpe:2.3:h:netgear:ac2600:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6700_firmware>>Versions before 1.2.0.76(exclusive)
cpe:2.3:o:netgear:r6700_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6700>>v2
cpe:2.3:h:netgear:r6700:v2:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6800_firmware>>Versions before 1.2.0.76(exclusive)
cpe:2.3:o:netgear:r6800_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6800>>-
cpe:2.3:h:netgear:r6800:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6900_firmware>>Versions before 1.2.0.76(exclusive)
cpe:2.3:o:netgear:r6900_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6900>>v2
cpe:2.3:h:netgear:r6900:v2:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r7200_firmware>>Versions before 1.2.0.76(exclusive)
cpe:2.3:o:netgear:r7200_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r7200>>-
cpe:2.3:h:netgear:r7200:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r7350_firmware>>Versions before 1.2.0.76(exclusive)
cpe:2.3:o:netgear:r7350_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r7350>>-
cpe:2.3:h:netgear:r7350:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r7400_firmware>>Versions before 1.2.0.76(exclusive)
cpe:2.3:o:netgear:r7400_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r7400>>-
cpe:2.3:h:netgear:r7400:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r7450_firmware>>Versions before 1.2.0.76(exclusive)
cpe:2.3:o:netgear:r7450_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r7450>>-
cpe:2.3:h:netgear:r7450:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6220_firmware>>Versions before 1.1.0.104(exclusive)
cpe:2.3:o:netgear:r6220_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6220>>-
cpe:2.3:h:netgear:r6220:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6230_firmware>>Versions before 1.1.0.104(exclusive)
cpe:2.3:o:netgear:r6230_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6230>>-
cpe:2.3:h:netgear:r6230:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6260_firmware>>Versions before 1.1.0.78(exclusive)
cpe:2.3:o:netgear:r6260_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6260>>-
cpe:2.3:h:netgear:r6260:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6330_firmware>>Versions before 1.1.0.78(exclusive)
cpe:2.3:o:netgear:r6330_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6330>>-
cpe:2.3:h:netgear:r6330:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6350_firmware>>Versions before 1.1.0.78(exclusive)
cpe:2.3:o:netgear:r6350_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6350>>-
cpe:2.3:h:netgear:r6350:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6850_firmware>>Versions before 1.1.0.78(exclusive)
cpe:2.3:o:netgear:r6850_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6850>>-
cpe:2.3:h:netgear:r6850:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6120_firmware>>Versions before 1.0.0.76(exclusive)
cpe:2.3:o:netgear:r6120_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6120>>-
cpe:2.3:h:netgear:r6120:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6020_firmware>>Versions before 1.0.0.48(exclusive)
cpe:2.3:o:netgear:r6020_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6020>>-
cpe:2.3:h:netgear:r6020:-:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6080_firmware>>Versions before 1.0.0.48(exclusive)
cpe:2.3:o:netgear:r6080_firmware:*:*:*:*:*:*:*:*
NETGEAR, Inc.
netgear
>>r6080>>-
cpe:2.3:h:netgear:r6080:-:*:*:*:*:*:*:*
Weaknesses
CWE IDTypeSource
CWE-288Primaryzdi-disclosures@trendmicro.com
CWE-287Secondarynvd@nist.gov
CWE ID: CWE-288
Type: Primary
Source: zdi-disclosures@trendmicro.com
CWE ID: CWE-287
Type: Secondary
Source: nvd@nist.gov
Evaluator Description

Evaluator Impact

Evaluator Solution

Vendor Statements

References
HyperlinkSourceResource
https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routerszdi-disclosures@trendmicro.com
Vendor Advisory
https://www.zerodayinitiative.com/advisories/ZDI-20-1451/zdi-disclosures@trendmicro.com
Third Party Advisory
VDB Entry
Hyperlink: https://kb.netgear.com/000062641/Security-Advisory-for-Password-Recovery-Vulnerabilities-on-Some-Routers
Source: zdi-disclosures@trendmicro.com
Resource:
Vendor Advisory
Hyperlink: https://www.zerodayinitiative.com/advisories/ZDI-20-1451/
Source: zdi-disclosures@trendmicro.com
Resource:
Third Party Advisory
VDB Entry

Change History

0
Information is not available yet

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