cve-2023-32251
Vulnerability from cvelistv5
Published
2025-07-31 20:44
Modified
2025-08-01 13:29
Severity ?
EPSS score ?
Summary
Kernel: ksmbd brute force delay bypass via asynchronous requests
References
Impacted products
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A security control designed to prevent dictionary attacks, which introduces a 5-second delay during session setup, can be bypassed through the use of asynchronous requests. This bypass negates the intended anti-brute-force protection, potentially allowing attackers to conduct dictionary attacks more efficiently against user credentials or other authentication mechanisms." } ], "metrics": [ { "other": { "content": { "namespace": "https://access.redhat.com/security/updates/classification/", "value": "Low" }, "type": "Red Hat severity rating" } }, { "cvssV3_1": { "attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "NONE", "baseScore": 3.7, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N", "version": "3.1" }, "format": "CVSS" } ], "problemTypes": [ { "descriptions": [ { "cweId": "CWE-307", "description": "Improper Restriction of Excessive Authentication Attempts", "lang": "en", "type": "CWE" } ] } ], "providerMetadata": { "dateUpdated": "2025-08-01T00:50:43.166Z", "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat" }, "references": [ { "url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b096d97f47326b1e2dbdef1c91fab69ffda54d17" }, { "url": "https://www.zerodayinitiative.com/advisories/ZDI-23-699/" } ], "timeline": [ { "lang": "en", "time": "2025-07-31T19:56:30.351000+00:00", "value": "Reported to Red Hat." }, { "lang": "en", "time": "2023-05-17T00:00:00+00:00", "value": "Made public." } ], "title": "Kernel: ksmbd brute force delay bypass via asynchronous requests", "x_redhatCweChain": "CWE-307: Improper Restriction of Excessive Authentication Attempts" } }, "cveMetadata": { "assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "assignerShortName": "redhat", "cveId": "CVE-2023-32251", "datePublished": "2025-07-31T20:44:02.968Z", "dateReserved": "2023-05-05T10:00:07.895Z", "dateUpdated": "2025-08-01T13:29:57.568Z", "state": "PUBLISHED" }, "dataType": "CVE_RECORD", "dataVersion": "5.1", "meta": { "nvd": "{\"cve\":{\"id\":\"CVE-2023-32251\",\"sourceIdentifier\":\"secalert@redhat.com\",\"published\":\"2025-07-31T21:15:26.810\",\"lastModified\":\"2025-08-04T15:06:36.623\",\"vulnStatus\":\"Awaiting Analysis\",\"cveTags\":[],\"descriptions\":[{\"lang\":\"en\",\"value\":\"A vulnerability has been identified in the Linux kernel\u0027s ksmbd component (kernel SMB/CIFS server). A security control designed to prevent dictionary attacks, which introduces a 5-second delay during session setup, can be bypassed through the use of asynchronous requests. This bypass negates the intended anti-brute-force protection, potentially allowing attackers to conduct dictionary attacks more efficiently against user credentials or other authentication mechanisms.\"},{\"lang\":\"es\",\"value\":\"Se ha identificado una vulnerabilidad en el componente ksmbd del kernel de Linux (servidor SMB/CIFS del kernel). Un control de seguridad dise\u00f1ado para prevenir ataques de diccionario, que introduce un retraso de 5 segundos durante la configuraci\u00f3n de la sesi\u00f3n, puede eludirse mediante solicitudes as\u00edncronas. Esta elusi\u00f3n invalida la protecci\u00f3n anti-fuerza bruta prevista, lo que podr\u00eda permitir a los atacantes realizar ataques de diccionario de forma m\u00e1s eficiente contra las credenciales de usuario u otros mecanismos de autenticaci\u00f3n.\"}],\"metrics\":{\"cvssMetricV31\":[{\"source\":\"secalert@redhat.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N\",\"baseScore\":3.7,\"baseSeverity\":\"LOW\",\"attackVector\":\"NETWORK\",\"attackComplexity\":\"HIGH\",\"privilegesRequired\":\"NONE\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"LOW\",\"integrityImpact\":\"NONE\",\"availabilityImpact\":\"NONE\"},\"exploitabilityScore\":2.2,\"impactScore\":1.4}]},\"weaknesses\":[{\"source\":\"secalert@redhat.com\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-307\"}]}],\"references\":[{\"url\":\"https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=b096d97f47326b1e2dbdef1c91fab69ffda54d17\",\"source\":\"secalert@redhat.com\"},{\"url\":\"https://www.zerodayinitiative.com/advisories/ZDI-23-699/\",\"source\":\"secalert@redhat.com\"}]}}" } }
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- 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.