var-202110-1148
Vulnerability from variot
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2020 1.01rc001 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the var:menu parameter provided to the webproc endpoint. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-13270. D-Link DAP-2020 A stack-based buffer overflow vulnerability exists in the router. Zero Day Initiative To this vulnerability ZDI-CAN-13270 Was numbering.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be in a state. D-Link DAP-2020 is a wireless N access point
Show details on source website{ "affected_products": { "_id": null, "data": [ { "_id": null, "model": "dap-2020", "scope": null, "trust": 1.5, "vendor": "d link", "version": null }, { "_id": null, "model": "dap-2020", "scope": "lte", "trust": 1.0, "vendor": "dlink", "version": "1.01" }, { "_id": null, "model": "dap-2020", "scope": "eq", "trust": 0.8, "vendor": "d link", "version": null }, { "_id": null, "model": "dap-2020", "scope": "eq", "trust": 0.8, "vendor": "d link", "version": "dap-2020 firmware" }, { "_id": null, "model": "dap-2020", "scope": "lte", "trust": 0.6, "vendor": "d link", "version": "\u003c=1.01" } ], "sources": [ { "db": "ZDI", "id": "ZDI-21-978" }, { "db": "CNVD", "id": "CNVD-2021-67523" }, { "db": "JVNDB", "id": "JVNDB-2021-014127" }, { "db": "NVD", "id": "CVE-2021-34862" } ] }, "credits": { "_id": null, "data": "chung96vn \u0026 Quang Nguyen (aka sovietw0rm) of Vietnam National Cyber Security Center (NCSC Vietnam)", "sources": [ { "db": "ZDI", "id": "ZDI-21-978" } ], "trust": 0.7 }, "cve": "CVE-2021-34862", "cvss": { "_id": null, "data": [ { "cvssV2": [ { "accessComplexity": "LOW", "accessVector": "ADJACENT_NETWORK", "authentication": "NONE", "author": "nvd@nist.gov", "availabilityImpact": "PARTIAL", "baseScore": 5.8, "confidentialityImpact": "PARTIAL", "exploitabilityScore": 6.5, "id": "CVE-2021-34862", "impactScore": 6.4, "integrityImpact": "PARTIAL", "severity": "MEDIUM", "trust": 1.8, "vectorString": "AV:A/AC:L/Au:N/C:P/I:P/A:P", "version": "2.0" }, { "accessComplexity": "LOW", "accessVector": "ADJACENT_NETWORK", "authentication": "NONE", "author": "CNVD", "availabilityImpact": "COMPLETE", "baseScore": 8.3, "confidentialityImpact": "COMPLETE", "exploitabilityScore": 6.5, "id": "CNVD-2021-67523", "impactScore": 10.0, "integrityImpact": "COMPLETE", "severity": "HIGH", "trust": 0.6, "vectorString": "AV:A/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0" } ], "cvssV3": [ { "attackComplexity": "LOW", "attackVector": "ADJACENT", "author": "zdi-disclosures@trendmicro.com", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "exploitabilityScore": 2.8, "id": "CVE-2021-34862", "impactScore": 5.9, "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "trust": 1.8, "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0" }, { "attackComplexity": "LOW", "attackVector": "ADJACENT", "author": "nvd@nist.gov", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "exploitabilityScore": 2.8, "id": "CVE-2021-34862", "impactScore": 5.9, "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "trust": 1.0, "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.1" }, { "attackComplexity": "LOW", "attackVector": "ADJACENT", "author": "ZDI", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "exploitabilityScore": 2.8, "id": "CVE-2021-34862", "impactScore": 5.9, "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "trust": 0.7, "userInteraction": "NONE", "vectorString": "AV:A/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H", "version": "3.0" } ], "severity": [ { "author": "nvd@nist.gov", "id": "CVE-2021-34862", "trust": 1.0, "value": "HIGH" }, { "author": "zdi-disclosures@trendmicro.com", "id": "CVE-2021-34862", "trust": 1.0, "value": "HIGH" }, { "author": "NVD", "id": "CVE-2021-34862", "trust": 0.8, "value": "High" }, { "author": "ZDI", "id": "CVE-2021-34862", "trust": 0.7, "value": "HIGH" }, { "author": "CNVD", "id": "CNVD-2021-67523", "trust": 0.6, "value": "HIGH" }, { "author": "CNNVD", "id": "CNNVD-202108-1618", "trust": 0.6, "value": "HIGH" } ] } ], "sources": [ { "db": "ZDI", "id": "ZDI-21-978" }, { "db": "CNVD", "id": "CNVD-2021-67523" }, { "db": "JVNDB", "id": "JVNDB-2021-014127" }, { "db": "CNNVD", "id": "CNNVD-202108-1618" }, { "db": "NVD", "id": "CVE-2021-34862" }, { "db": "NVD", "id": "CVE-2021-34862" } ] }, "description": { "_id": null, "data": "This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of D-Link DAP-2020 1.01rc001 routers. Authentication is not required to exploit this vulnerability. The specific flaw exists within the handling of the var:menu parameter provided to the webproc endpoint. The issue results from the lack of proper validation of the length of user-supplied data prior to copying it to a fixed-length stack-based buffer. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-13270. D-Link DAP-2020 A stack-based buffer overflow vulnerability exists in the router. Zero Day Initiative To this vulnerability ZDI-CAN-13270 Was numbering.Information is obtained, information is tampered with, and service operation is interrupted. (DoS) It may be in a state. D-Link DAP-2020 is a wireless N access point", "sources": [ { "db": "NVD", "id": "CVE-2021-34862" }, { "db": "JVNDB", "id": "JVNDB-2021-014127" }, { "db": "ZDI", "id": "ZDI-21-978" }, { "db": "CNVD", "id": "CNVD-2021-67523" }, { "db": "VULMON", "id": "CVE-2021-34862" } ], "trust": 2.88 }, "external_ids": { "_id": null, "data": [ { "db": "NVD", "id": "CVE-2021-34862", "trust": 4.6 }, { "db": "ZDI", "id": "ZDI-21-978", "trust": 3.8 }, { "db": "DLINK", "id": "SAP10201", "trust": 1.6 }, { "db": "JVNDB", "id": "JVNDB-2021-014127", "trust": 0.8 }, { "db": "ZDI_CAN", "id": "ZDI-CAN-13270", "trust": 0.7 }, { "db": "CNVD", "id": "CNVD-2021-67523", "trust": 0.6 }, { "db": "CS-HELP", "id": "SB2021100105", "trust": 0.6 }, { "db": "CNNVD", "id": "CNNVD-202108-1618", "trust": 0.6 }, { "db": "VULMON", "id": "CVE-2021-34862", "trust": 0.1 } ], "sources": [ { "db": "ZDI", "id": "ZDI-21-978" }, { "db": "CNVD", "id": "CNVD-2021-67523" }, { "db": "VULMON", "id": "CVE-2021-34862" }, { "db": "JVNDB", "id": "JVNDB-2021-014127" }, { "db": "CNNVD", "id": "CNNVD-202108-1618" }, { "db": "NVD", "id": "CVE-2021-34862" } ] }, "id": "VAR-202110-1148", "iot": { "_id": null, "data": true, "sources": [ { "db": "CNVD", "id": "CNVD-2021-67523" } ], "trust": 1.24 }, "iot_taxonomy": { "_id": null, "data": [ { "category": [ "Network device" ], "sub_category": null, "trust": 0.6 } ], "sources": [ { "db": "CNVD", "id": "CNVD-2021-67523" } ] }, "last_update_date": "2024-08-14T14:18:20.185000Z", "patch": { "_id": null, "data": [ { "title": "Multiple\u00a0Vulnerability", "trust": 1.5, "url": "https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=SAP10201" }, { "title": "Patch for D-Link DAP-2020 stack buffer overflow vulnerability (CNVD-2021-67523)", "trust": 0.6, "url": "https://www.cnvd.org.cn/patchInfo/show/288991" }, { "title": "D-Link DAP-2020 Security vulnerabilities", "trust": 0.6, "url": "http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=160427" } ], "sources": [ { "db": "ZDI", "id": "ZDI-21-978" }, { "db": "CNVD", "id": "CNVD-2021-67523" }, { "db": "JVNDB", "id": "JVNDB-2021-014127" }, { "db": "CNNVD", "id": "CNNVD-202108-1618" } ] }, "problemtype_data": { "_id": null, "data": [ { "problemtype": "CWE-121", "trust": 1.0 }, { "problemtype": "Stack-based buffer overflow (CWE-121) [ others ]", "trust": 0.8 } ], "sources": [ { "db": "JVNDB", "id": "JVNDB-2021-014127" }, { "db": "NVD", "id": "CVE-2021-34862" } ] }, "references": { "_id": null, "data": [ { "trust": 3.7, "url": "https://www.zerodayinitiative.com/advisories/zdi-21-978/" }, { "trust": 2.3, "url": "https://supportannouncement.us.dlink.com/announcement/publication.aspx?name=sap10201" }, { "trust": 0.8, "url": "https://nvd.nist.gov/vuln/detail/cve-2021-34862" }, { "trust": 0.6, "url": "https://www.cybersecurity-help.cz/vdb/sb2021100105" } ], "sources": [ { "db": "ZDI", "id": "ZDI-21-978" }, { "db": "CNVD", "id": "CNVD-2021-67523" }, { "db": "VULMON", "id": "CVE-2021-34862" }, { "db": "JVNDB", "id": "JVNDB-2021-014127" }, { "db": "CNNVD", "id": "CNNVD-202108-1618" }, { "db": "NVD", "id": "CVE-2021-34862" } ] }, "sources": { "_id": null, "data": [ { "db": "ZDI", "id": "ZDI-21-978", "ident": null }, { "db": "CNVD", "id": "CNVD-2021-67523", "ident": null }, { "db": "VULMON", "id": "CVE-2021-34862", "ident": null }, { "db": "JVNDB", "id": "JVNDB-2021-014127", "ident": null }, { "db": "CNNVD", "id": "CNNVD-202108-1618", "ident": null }, { "db": "NVD", "id": "CVE-2021-34862", "ident": null } ] }, "sources_release_date": { "_id": null, "data": [ { "date": "2021-12-22T00:00:00", "db": "ZDI", "id": "ZDI-21-978", "ident": null }, { "date": "2021-09-02T00:00:00", "db": "CNVD", "id": "CNVD-2021-67523", "ident": null }, { "date": "2022-10-05T00:00:00", "db": "JVNDB", "id": "JVNDB-2021-014127", "ident": null }, { "date": "2021-08-18T00:00:00", "db": "CNNVD", "id": "CNNVD-202108-1618", "ident": null }, { "date": "2021-10-25T17:15:08.537000", "db": "NVD", "id": "CVE-2021-34862", "ident": null } ] }, "sources_update_date": { "_id": null, "data": [ { "date": "2021-12-22T00:00:00", "db": "ZDI", "id": "ZDI-21-978", "ident": null }, { "date": "2021-09-02T00:00:00", "db": "CNVD", "id": "CNVD-2021-67523", "ident": null }, { "date": "2022-10-05T05:50:00", "db": "JVNDB", "id": "JVNDB-2021-014127", "ident": null }, { "date": "2021-10-28T00:00:00", "db": "CNNVD", "id": "CNNVD-202108-1618", "ident": null }, { "date": "2023-04-26T19:27:52.350000", "db": "NVD", "id": "CVE-2021-34862", "ident": null } ] }, "threat_type": { "_id": null, "data": "remote or local", "sources": [ { "db": "CNNVD", "id": "CNNVD-202108-1618" } ], "trust": 0.6 }, "title": { "_id": null, "data": "D-Link\u00a0DAP-2020\u00a0 Stack-based buffer overflow vulnerability in routers", "sources": [ { "db": "JVNDB", "id": "JVNDB-2021-014127" } ], "trust": 0.8 }, "type": { "_id": null, "data": "other", "sources": [ { "db": "CNNVD", "id": "CNNVD-202108-1618" } ], "trust": 0.6 } }
Sightings
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Nomenclature
- Seen: The vulnerability was mentioned, discussed, or seen somewhere by the user.
- Confirmed: The vulnerability is confirmed from an analyst perspective.
- Exploited: This vulnerability was exploited and seen by the user reporting the sighting.
- Patched: This vulnerability was successfully patched by the user reporting the sighting.
- Not exploited: This vulnerability was not exploited or seen by the user reporting the sighting.
- Not confirmed: The user expresses doubt about the veracity of the vulnerability.
- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.