{"dataType": "CVE_RECORD", "dataVersion": "5.1", "cveMetadata": {"state": "PUBLISHED", "cveId": "CVE-2009-4128", "assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "dateUpdated": "2024-08-07T06:54:09.498Z", "dateReserved": "2009-11-30T00:00:00.000Z", "datePublished": "2009-12-01T00:00:00.000Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre", "dateUpdated": "2024-01-16T00:06:22.366Z"}, "descriptions": [{"lang": "en", "value": "GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with the actual password, which makes it easier for physically proximate attackers to conduct brute force attacks and bypass authentication by submitting a password whose length is 1."}], "affected": [{"vendor": "n/a", "product": "n/a", "versions": [{"version": "n/a", "status": "affected"}]}], "references": [{"url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=555195"}, {"name": "36968", "tags": ["vdb-entry"], "url": "http://www.securityfocus.com/bid/36968"}, {"name": "gnugrub2-password-auth-bypass(54210)", "tags": ["vdb-entry"], "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/54210"}, {"name": "[oss-security] 20240116 CVE-2023-4001: a password bypass vulnerability in the downstream GRUB boot manager", "tags": ["mailing-list"], "url": "http://www.openwall.com/lists/oss-security/2024/01/15/3"}], "problemTypes": [{"descriptions": [{"type": "text", "lang": "en", "description": "n/a"}]}], "datePublic": "2009-11-09T00:00:00.000Z"}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-07T06:54:09.498Z"}, "title": "CVE Program Container", "references": [{"url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=555195", "tags": ["x_transferred"]}, {"name": "36968", "tags": ["vdb-entry", "x_transferred"], "url": "http://www.securityfocus.com/bid/36968"}, {"name": "gnugrub2-password-auth-bypass(54210)", "tags": ["vdb-entry", "x_transferred"], "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/54210"}, {"name": "[oss-security] 20240116 CVE-2023-4001: a password bypass vulnerability in the downstream GRUB boot manager", "tags": ["mailing-list", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2024/01/15/3"}]}]}}

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{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:a:gnu:grub_2:1.97:*:*:*:*:*:*:*", "matchCriteriaId": "955C28B6-5161-429A-92B3-996A3B799E68", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with the actual password, which makes it easier for physically proximate attackers to conduct brute force attacks and bypass authentication by submitting a password whose length is 1."}, {"lang": "es", "value": "GNU GRand Unified Bootloader (GRUB) 2 v1.97 \u00fanicamente compara el fragmento enviado de una contrase\u00f1a con la contrase\u00f1a actual, lo que facilita que atacantes pr\u00f3ximos realicen ataques de fuerza bruta y eviten la autenticaci\u00f3n mediante el env\u00edo de una contrase\u00f1a de longitud 1."}], "id": "CVE-2009-4128", "lastModified": "2026-04-23T00:35:47.467", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.2, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}]}, "published": "2009-12-01T16:30:01.467", "references": [{"source": "cve@mitre.org", "tags": ["Exploit"], "url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=555195"}, {"source": "cve@mitre.org", "url": "http://www.openwall.com/lists/oss-security/2024/01/15/3"}, {"source": "cve@mitre.org", "tags": ["Patch"], "url": "http://www.securityfocus.com/bid/36968"}, {"source": "cve@mitre.org", "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/54210"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit"], "url": "http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=555195"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "http://www.openwall.com/lists/oss-security/2024/01/15/3"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "http://www.securityfocus.com/bid/36968"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://exchange.xforce.ibmcloud.com/vulnerabilities/54210"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-287"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "grub2: Improper password checking", "id": "543153", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=543153"}, "csaw": false, "cvss": {"cvss_base_score": "6.2", "cvss_scoring_vector": "AV:L/AC:H/Au:N/C:C/I:C/A:C", "status": "draft"}, "details": ["GNU GRand Unified Bootloader (GRUB) 2 1.97 only compares the submitted portion of a password with the actual password, which makes it easier for physically proximate attackers to conduct brute force attacks and bypass authentication by submitting a password whose length is 1."], "name": "CVE-2009-4128", "public_date": "2009-11-08T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2009-4128"], "threat_severity": "Moderate"}

{}