var-202104-1039
Vulnerability from variot
This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Nighthawk R7800. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of the rc_service parameter provided to apply_bind.cgi. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12303
Show details on source website{ "affected_products": { "_id": null, "data": [ { "_id": null, "model": "rbk53", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.7.2.104" }, { "_id": null, "model": "r9000", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.5.28" }, { "_id": null, "model": "ex6250", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.0.134" }, { "_id": null, "model": "r7800", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.2.80" }, { "_id": null, "model": "rbr20", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.6.2.104" }, { "_id": null, "model": "r8900", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.5.28" }, { "_id": null, "model": "rbk20", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.6.2.104" }, { "_id": null, "model": "rbk40", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.6.2.104" }, { "_id": null, "model": "ex6400", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.2.158" }, { "_id": null, "model": "rbs50", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.7.2.104" }, { "_id": null, "model": "rbs10", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.6.2.104" }, { "_id": null, "model": "rbk12", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.7.2.104" }, { "_id": null, "model": "rbs40", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.6.2.104" }, { "_id": null, "model": "d7800", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.1.60" }, { "_id": null, "model": "ex6420", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.0.134" }, { "_id": null, "model": "ex7300", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.2.158" }, { "_id": null, "model": "ex6400v2", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.0.134" }, { "_id": null, "model": "ex7320", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.0.134" }, { "_id": null, "model": "rbr50", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.7.2.104" }, { "_id": null, "model": "rbk13", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.7.2.104" }, { "_id": null, "model": "rbk23", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.7.2.104" }, { "_id": null, "model": "br200", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "5.10.0.5" }, { "_id": null, "model": "rbk44", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.6.2.104" }, { "_id": null, "model": "xr500", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.3.2.114" }, { "_id": null, "model": "lbr20", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.6.3.50" }, { "_id": null, "model": "rbs20", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.6.2.104" }, { "_id": null, "model": "ex6410", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.0.134" }, { "_id": null, "model": "rbs50y", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.6.2.104" }, { "_id": null, "model": "rbk50", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.7.2.104" }, { "_id": null, "model": "xr450", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.3.2.114" }, { "_id": null, "model": "br500", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "5.10.0.5" }, { "_id": null, "model": "rbk14", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.7.2.104" }, { "_id": null, "model": "ex6150", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.1.98" }, { "_id": null, "model": "ex7300v2", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.0.134" }, { "_id": null, "model": "xr700", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.1.38" }, { "_id": null, "model": "rbr40", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.6.2.104" }, { "_id": null, "model": "ex6100v2", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.1.98" }, { "_id": null, "model": "rbk43", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.6.2.104" }, { "_id": null, "model": "ex7700", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.0.216" }, { "_id": null, "model": "rbr10", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.6.2.104" }, { "_id": null, "model": "rbk43s", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.6.2.104" }, { "_id": null, "model": "ex8000", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "1.0.1.232" }, { "_id": null, "model": "rbk15", "scope": "lt", "trust": 1.0, "vendor": "netgear", "version": "2.7.2.104" }, { "_id": null, "model": "r7800", "scope": null, "trust": 0.7, "vendor": "netgear", "version": null } ], "sources": [ { "db": "ZDI", "id": "ZDI-21-249" }, { "db": "NVD", "id": "CVE-2021-27253" } ] }, "credits": { "_id": null, "data": "Ho\\xc3\\xa0ng Th\\xe1\\xba\\xa1ch Nguy\\xe1\\xbb\\x85n, Lucas Tay", "sources": [ { "db": "ZDI", "id": "ZDI-21-249" } ], "trust": 0.7 }, "cve": "CVE-2021-27253", "cvss": { "_id": null, "data": [ { "cvssV2": [ { "accessComplexity": "LOW", "accessVector": "ADJACENT_NETWORK", "authentication": "NONE", "author": "nvd@nist.gov", "availabilityImpact": "COMPLETE", "baseScore": 8.3, "confidentialityImpact": "COMPLETE", "exploitabilityScore": 6.5, "id": "CVE-2021-27253", "impactScore": 10.0, "integrityImpact": "COMPLETE", "severity": "HIGH", "trust": 1.1, "vectorString": "AV:A/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0" } ], "cvssV3": [ { "attackComplexity": "LOW", "attackVector": "ADJACENT", "author": "nvd@nist.gov", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "exploitabilityScore": 2.8, "id": "CVE-2021-27253", "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-disclosures@trendmicro.com", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "exploitabilityScore": 2.8, "id": "CVE-2021-27253", "impactScore": 5.9, "integrityImpact": "HIGH", "privilegesRequired": "NONE", "scope": "UNCHANGED", "trust": 1.0, "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": "ZDI", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "exploitabilityScore": 2.8, "id": "CVE-2021-27253", "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-2021-27253", "trust": 1.0, "value": "HIGH" }, { "author": "zdi-disclosures@trendmicro.com", "id": "CVE-2021-27253", "trust": 1.0, "value": "HIGH" }, { "author": "ZDI", "id": "CVE-2021-27253", "trust": 0.7, "value": "HIGH" }, { "author": "CNNVD", "id": "CNNVD-202104-1071", "trust": 0.6, "value": "HIGH" }, { "author": "VULMON", "id": "CVE-2021-27253", "trust": 0.1, "value": "HIGH" } ] } ], "sources": [ { "db": "ZDI", "id": "ZDI-21-249" }, { "db": "VULMON", "id": "CVE-2021-27253" }, { "db": "CNNVD", "id": "CNNVD-202104-1071" }, { "db": "NVD", "id": "CVE-2021-27253" }, { "db": "NVD", "id": "CVE-2021-27253" } ] }, "description": { "_id": null, "data": "This vulnerability allows network-adjacent attackers to execute arbitrary code on affected installations of NETGEAR Nighthawk R7800. Although authentication is required to exploit this vulnerability, the existing authentication mechanism can be bypassed. The specific flaw exists within the handling of the rc_service parameter provided to apply_bind.cgi. The issue results from the lack of proper validation of a user-supplied string before using it to execute a system call. An attacker can leverage this vulnerability to execute code in the context of root. Was ZDI-CAN-12303", "sources": [ { "db": "NVD", "id": "CVE-2021-27253" }, { "db": "ZDI", "id": "ZDI-21-249" }, { "db": "VULMON", "id": "CVE-2021-27253" } ], "trust": 1.62 }, "external_ids": { "_id": null, "data": [ { "db": "NVD", "id": "CVE-2021-27253", "trust": 2.4 }, { "db": "ZDI", "id": "ZDI-21-249", "trust": 2.4 }, { "db": "ZDI_CAN", "id": "ZDI-CAN-12303", "trust": 0.7 }, { "db": "CNNVD", "id": "CNNVD-202104-1071", "trust": 0.6 }, { "db": "VULMON", "id": "CVE-2021-27253", "trust": 0.1 } ], "sources": [ { "db": "ZDI", "id": "ZDI-21-249" }, { "db": "VULMON", "id": "CVE-2021-27253" }, { "db": "CNNVD", "id": "CNNVD-202104-1071" }, { "db": "NVD", "id": "CVE-2021-27253" } ] }, "id": "VAR-202104-1039", "iot": { "_id": null, "data": true, "sources": [ { "db": "VARIoT devices database", "id": null } ], "trust": 0.25201656722222227 }, "last_update_date": "2024-11-23T22:33:05.324000Z", "patch": { "_id": null, "data": [ { "title": "NETGEAR has issued an update to correct this vulnerability.", "trust": 0.7, "url": "https://kb.netgear.com/000062883/Security-Advisory-for-Multiple-Vulnerabilities-on-Some-Routers-Satellites-and-Extenders" }, { "title": "Netgear NETGEAR Buffer error vulnerability fix", "trust": 0.6, "url": "http://www.cnnvd.org.cn/web/xxk/bdxqById.tag?id=148415" } ], "sources": [ { "db": "ZDI", "id": "ZDI-21-249" }, { "db": "CNNVD", "id": "CNNVD-202104-1071" } ] }, "problemtype_data": { "_id": null, "data": [ { "problemtype": "CWE-122", "trust": 1.0 }, { "problemtype": "CWE-787", "trust": 1.0 } ], "sources": [ { "db": "NVD", "id": "CVE-2021-27253" } ] }, "references": { "_id": null, "data": [ { "trust": 2.4, "url": "https://kb.netgear.com/000062883/security-advisory-for-multiple-vulnerabilities-on-some-routers-satellites-and-extenders" }, { "trust": 1.8, "url": "https://www.zerodayinitiative.com/advisories/zdi-21-249/" }, { "trust": 0.6, "url": "https://nvd.nist.gov/vuln/detail/cve-2021-27253" }, { "trust": 0.1, "url": "https://cwe.mitre.org/data/definitions/787.html" }, { "trust": 0.1, "url": "https://nvd.nist.gov" } ], "sources": [ { "db": "ZDI", "id": "ZDI-21-249" }, { "db": "VULMON", "id": "CVE-2021-27253" }, { "db": "CNNVD", "id": "CNNVD-202104-1071" }, { "db": "NVD", "id": "CVE-2021-27253" } ] }, "sources": { "_id": null, "data": [ { "db": "ZDI", "id": "ZDI-21-249", "ident": null }, { "db": "VULMON", "id": "CVE-2021-27253", "ident": null }, { "db": "CNNVD", "id": "CNNVD-202104-1071", "ident": null }, { "db": "NVD", "id": "CVE-2021-27253", "ident": null } ] }, "sources_release_date": { "_id": null, "data": [ { "date": "2021-02-24T00:00:00", "db": "ZDI", "id": "ZDI-21-249", "ident": null }, { "date": "2021-04-14T00:00:00", "db": "VULMON", "id": "CVE-2021-27253", "ident": null }, { "date": "2021-04-14T00:00:00", "db": "CNNVD", "id": "CNNVD-202104-1071", "ident": null }, { "date": "2021-04-14T16:15:13.797000", "db": "NVD", "id": "CVE-2021-27253", "ident": null } ] }, "sources_update_date": { "_id": null, "data": [ { "date": "2021-02-24T00:00:00", "db": "ZDI", "id": "ZDI-21-249", "ident": null }, { "date": "2021-04-23T00:00:00", "db": "VULMON", "id": "CVE-2021-27253", "ident": null }, { "date": "2021-04-25T00:00:00", "db": "CNNVD", "id": "CNNVD-202104-1071", "ident": null }, { "date": "2024-11-21T05:57:41.613000", "db": "NVD", "id": "CVE-2021-27253", "ident": null } ] }, "threat_type": { "_id": null, "data": "remote or local", "sources": [ { "db": "CNNVD", "id": "CNNVD-202104-1071" } ], "trust": 0.6 }, "title": { "_id": null, "data": "(Pwn2Own) NETGEAR Nighthawk R7800 Heap-based Buffer Overflow Remote Code Execution Vulnerability", "sources": [ { "db": "ZDI", "id": "ZDI-21-249" } ], "trust": 0.7 }, "type": { "_id": null, "data": "buffer error", "sources": [ { "db": "CNNVD", "id": "CNNVD-202104-1071" } ], "trust": 0.6 } }
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Sightings
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Nomenclature
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- Not patched: This vulnerability was not successfully patched by the user reporting the sighting.