{"containers": {"cna": {"affected": [{"product": "kernel", "vendor": "n/a", "versions": [{"status": "affected", "version": "kernel 5.4.92"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality."}], "problemTypes": [{"descriptions": [{"cweId": "CWE-822", "description": "CWE-822->CWE-200", "lang": "en", "type": "CWE"}]}], "providerMetadata": {"dateUpdated": "2021-05-28T10:42:29", "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1923636"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "secalert@redhat.com", "ID": "CVE-2021-20239", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "kernel", "version": {"version_data": [{"version_value": "kernel 5.4.92"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "CWE-822->CWE-200"}]}]}, "references": {"reference_data": [{"name": "https://bugzilla.redhat.com/show_bug.cgi?id=1923636", "refsource": "MISC", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1923636"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-03T17:37:22.636Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1923636"}]}]}, "cveMetadata": {"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "assignerShortName": "redhat", "cveId": "CVE-2021-20239", "datePublished": "2021-05-28T10:42:29", "dateReserved": "2020-12-17T00:00:00", "dateUpdated": "2024-08-03T17:37:22.636Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "6B130008-5C96-49EE-9BC8-E954F395A514", "versionEndExcluding": "5.4.92", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:redhat:enterprise_linux:5.0:*:*:*:*:*:*:*", "matchCriteriaId": "1D8B549B-E57B-4DFE-8A13-CAB06B5356B3", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:6.0:*:*:*:*:*:*:*", "matchCriteriaId": "2F6AB192-9D7D-4A9A-8995-E53A9DE9EAFC", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:8.0:*:*:*:*:*:*:*", "matchCriteriaId": "F4CFF558-3C47-480D-A2F0-BABF26042943", "vulnerable": true}], "negate": false, "operator": "OR"}]}, {"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:fedoraproject:fedora:33:*:*:*:*:*:*:*", "matchCriteriaId": "E460AA51-FCDA-46B9-AE97-E6676AA5E194", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "descriptions": [{"lang": "en", "value": "A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality."}, {"lang": "es", "value": "Se encontr\u00f3 un fallo en el kernel de Linux en versiones anteriores a 5.4.92 en el protocolo BPF. Este fallo permite a un atacante con una cuenta local filtrar informaci\u00f3n sobre las direcciones internas del kernel. La mayor amenaza de esta vulnerabilidad es la confidencialidad"}], "id": "CVE-2021-20239", "lastModified": "2024-11-21T05:46:11.713", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 2.1, "confidentialityImpact": "PARTIAL", "integrityImpact": "NONE", "vectorString": "AV:L/AC:L/Au:N/C:P/I:N/A:N", "version": "2.0"}, "exploitabilityScore": 3.9, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 3.3, "baseSeverity": "LOW", "confidentialityImpact": "LOW", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 1.8, "impactScore": 1.4, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-05-28T11:15:08.003", "references": [{"source": "secalert@redhat.com", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1923636"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1923636"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-822"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-119"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"affected_release": [{"advisory": "RHSA-2021:4140", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-348.rt7.130.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-11-09T00:00:00Z"}, {"advisory": "RHSA-2021:4356", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-348.el8", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2021-11-09T00:00:00Z"}], "bugzilla": {"description": "kernel: setsockopt System Call Untrusted Pointer Dereference Information Disclosure", "id": "1923636", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1923636"}, "csaw": false, "cvss3": {"cvss3_base_score": "3.8", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:C/C:L/I:N/A:N", "status": "verified"}, "cwe": "CWE-822->CWE-200", "details": ["A flaw was found in the Linux kernel in versions before 5.4.92 in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality.", "A flaw was found in the BPF protocol. This flaw allows an attacker with a local account to leak information about kernel internal addresses. The highest threat from this vulnerability is to confidentiality."], "mitigation": {"lang": "en:us", "value": "Loading a filter is a privileged (CAP_SYS_ADMIN or root) operation. Once any filter is used, this attack is capable of being used by an unprivileged user. There is no known mitigation that product security finds suitable for this flaw."}, "name": "CVE-2021-20239", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-alt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2021-02-01T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-20239\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-20239"], "threat_severity": "Low"}

{}