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ID

VAR-202105-0688


CVE

CVE-2021-27342


TITLE

D-Link  Router  model DIR-842  Observable mismatch vulnerabilities in firmware

Trust: 0.8

sources: JVNDB: JVNDB-2021-006988

DESCRIPTION

An authentication brute-force protection mechanism bypass in telnetd in D-Link Router model DIR-842 firmware version 3.0.2 allows a remote attacker to circumvent the anti-brute-force cool-down delay period via a timing-based side-channel attack. D-Link Router model DIR-842 There is an observable mismatch vulnerability in the firmware.Information may be tampered with. D-Link DIR-842 is a home router produced by Taiwan D-Link Technology Co., Ltd

Trust: 2.25

sources: NVD: CVE-2021-27342 // JVNDB: JVNDB-2021-006988 // CNVD: CNVD-2022-38537 // VULMON: CVE-2021-27342

IOT TAXONOMY

category:['Network device']sub_category: -

Trust: 0.6

sources: CNVD: CNVD-2022-38537

AFFECTED PRODUCTS

vendor:dlinkmodel:dir-842escope:lteversion:3.0.2

Trust: 1.0

vendor:d linkmodel:dir-842escope:eqversion:dir-842e firmware 3.0.2

Trust: 0.8

vendor:d linkmodel:dir-842escope:eqversion: -

Trust: 0.8

vendor:d linkmodel:d-link dir-842scope:eqversion:3.0.2

Trust: 0.6

sources: CNVD: CNVD-2022-38537 // JVNDB: JVNDB-2021-006988 // NVD: CVE-2021-27342

CVSS

SEVERITY

CVSSV2

CVSSV3

nvd@nist.gov: CVE-2021-27342
value: MEDIUM

Trust: 1.0

NVD: CVE-2021-27342
value: MEDIUM

Trust: 0.8

CNVD: CNVD-2022-38537
value: MEDIUM

Trust: 0.6

CNNVD: CNNVD-202105-1167
value: MEDIUM

Trust: 0.6

VULMON: CVE-2021-27342
value: MEDIUM

Trust: 0.1

nvd@nist.gov: CVE-2021-27342
severity: MEDIUM
baseScore: 4.3
vectorString: AV:N/AC:M/AU:N/C:N/I:P/A:N
accessVector: NETWORK
accessComplexity: MEDIUM
authentication: NONE
confidentialityImpact: NONE
integrityImpact: PARTIAL
availabilityImpact: NONE
exploitabilityScore: 8.6
impactScore: 2.9
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 1.9

CNVD: CNVD-2022-38537
severity: MEDIUM
baseScore: 4.3
vectorString: AV:N/AC:M/AU:N/C:N/I:P/A:N
accessVector: NETWORK
accessComplexity: MEDIUM
authentication: NONE
confidentialityImpact: NONE
integrityImpact: PARTIAL
availabilityImpact: NONE
exploitabilityScore: 8.6
impactScore: 2.9
acInsufInfo: NONE
obtainAllPrivilege: NONE
obtainUserPrivilege: NONE
obtainOtherPrivilege: NONE
userInteractionRequired: NONE
version: 2.0

Trust: 0.6

nvd@nist.gov: CVE-2021-27342
baseSeverity: MEDIUM
baseScore: 5.9
vectorString: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
attackVector: NETWORK
attackComplexity: HIGH
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: HIGH
availabilityImpact: NONE
exploitabilityScore: 2.2
impactScore: 3.6
version: 3.1

Trust: 1.0

NVD: CVE-2021-27342
baseSeverity: MEDIUM
baseScore: 5.9
vectorString: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
attackVector: NETWORK
attackComplexity: HIGH
privilegesRequired: NONE
userInteraction: NONE
scope: UNCHANGED
confidentialityImpact: NONE
integrityImpact: HIGH
availabilityImpact: NONE
exploitabilityScore: NONE
impactScore: NONE
version: 3.0

Trust: 0.8

sources: CNVD: CNVD-2022-38537 // VULMON: CVE-2021-27342 // JVNDB: JVNDB-2021-006988 // CNNVD: CNNVD-202105-1167 // NVD: CVE-2021-27342

PROBLEMTYPE DATA

problemtype:CWE-203

Trust: 1.0

problemtype:Observable discrepancy (CWE-203) [NVD Evaluation ]

Trust: 0.8

sources: JVNDB: JVNDB-2021-006988 // NVD: CVE-2021-27342

THREAT TYPE

remote

Trust: 0.6

sources: CNNVD: CNNVD-202105-1167

TYPE

other

Trust: 0.6

sources: CNNVD: CNNVD-202105-1167

PATCH

title:Telnetd brute-force protection bypassurl:https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10225

Trust: 0.8

title:Patch for D-Link DIR-842 telnetd authentication explosion protection mechanism bypass vulnerabilityurl:https://www.cnvd.org.cn/patchInfo/show/333386

Trust: 0.6

title:D-Link Router Security vulnerabilitiesurl:http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=151838

Trust: 0.6

title:D-Link-CVE-2021-27342-exploiturl:https://github.com/guywhataguy/D-Link-CVE-2021-27342-exploit

Trust: 0.1

sources: CNVD: CNVD-2022-38537 // VULMON: CVE-2021-27342 // JVNDB: JVNDB-2021-006988 // CNNVD: CNNVD-202105-1167

EXTERNAL IDS

db:NVDid:CVE-2021-27342

Trust: 3.9

db:DLINKid:SAP10225

Trust: 1.7

db:JVNDBid:JVNDB-2021-006988

Trust: 0.8

db:CNVDid:CNVD-2022-38537

Trust: 0.6

db:CNNVDid:CNNVD-202105-1167

Trust: 0.6

db:VULMONid:CVE-2021-27342

Trust: 0.1

sources: CNVD: CNVD-2022-38537 // VULMON: CVE-2021-27342 // JVNDB: JVNDB-2021-006988 // CNNVD: CNNVD-202105-1167 // NVD: CVE-2021-27342

REFERENCES

url:https://nvd.nist.gov/vuln/detail/cve-2021-27342

Trust: 2.0

url:https://github.com/guywhataguy/d-link-cve-2021-27342-exploit/blob/main/dlink-telnet-exploit-cve-2021-27342.py

Trust: 1.7

url:https://blog.whtaguy.com/2021/05/d-link-router-cve-2021-27342.html

Trust: 1.7

url:https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=sap10225

Trust: 1.7

url:https://cwe.mitre.org/data/definitions/203.html

Trust: 0.1

url:https://github.com/guywhataguy/d-link-cve-2021-27342-exploit

Trust: 0.1

url:https://nvd.nist.gov

Trust: 0.1

sources: CNVD: CNVD-2022-38537 // VULMON: CVE-2021-27342 // JVNDB: JVNDB-2021-006988 // CNNVD: CNNVD-202105-1167 // NVD: CVE-2021-27342

SOURCES

db:CNVDid:CNVD-2022-38537
db:VULMONid:CVE-2021-27342
db:JVNDBid:JVNDB-2021-006988
db:CNNVDid:CNNVD-202105-1167
db:NVDid:CVE-2021-27342

LAST UPDATE DATE

2024-08-14T14:11:23.439000+00:00


SOURCES UPDATE DATE

db:CNVDid:CNVD-2022-38537date:2022-05-20T00:00:00
db:VULMONid:CVE-2021-27342date:2021-05-24T00:00:00
db:JVNDBid:JVNDB-2021-006988date:2022-01-27T08:58:00
db:CNNVDid:CNNVD-202105-1167date:2021-05-25T00:00:00
db:NVDid:CVE-2021-27342date:2021-05-24T20:14:05.517

SOURCES RELEASE DATE

db:CNVDid:CNVD-2022-38537date:2022-05-20T00:00:00
db:VULMONid:CVE-2021-27342date:2021-05-17T00:00:00
db:JVNDBid:JVNDB-2021-006988date:2022-01-27T00:00:00
db:CNNVDid:CNNVD-202105-1167date:2021-05-17T00:00:00
db:NVDid:CVE-2021-27342date:2021-05-17T13:15:07.733