CVE-2021-39636

{"containers": {"cna": {"affected": [{"product": "Android", "vendor": "n/a", "versions": [{"status": "affected", "version": "Android kernel"}]}], "descriptions": [{"lang": "en", "value": "In do_ipt_get_ctl and do_ipt_set_ctl of ip_tables.c, there is a possible way to leak kernel information due to uninitialized data. This could lead to local information disclosure with system execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-120612905References: Upstream kernel"}], "problemTypes": [{"descriptions": [{"description": "Information disclosure", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2021-12-15T18:05:53.000Z", "orgId": "baff130e-b8d5-4e15-b3d3-c3cf5d5545c6", "shortName": "google_android"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://source.android.com/security/bulletin/pixel/2021-12-01"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "security@android.com", "ID": "CVE-2021-39636", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "Android", "version": {"version_data": [{"version_value": "Android kernel"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "In do_ipt_get_ctl and do_ipt_set_ctl of ip_tables.c, there is a possible way to leak kernel information due to uninitialized data. This could lead to local information disclosure with system execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-120612905References: Upstream kernel"}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "Information disclosure"}]}]}, "references": {"reference_data": [{"name": "https://source.android.com/security/bulletin/pixel/2021-12-01", "refsource": "MISC", "url": "https://source.android.com/security/bulletin/pixel/2021-12-01"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-04T02:13:37.313Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://source.android.com/security/bulletin/pixel/2021-12-01"}]}]}, "cveMetadata": {"assignerOrgId": "baff130e-b8d5-4e15-b3d3-c3cf5d5545c6", "assignerShortName": "google_android", "cveId": "CVE-2021-39636", "datePublished": "2021-12-15T18:05:53.000Z", "dateReserved": "2021-08-23T00:00:00.000Z", "dateUpdated": "2024-08-04T02:13:37.313Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"affected": [{"affectedData": [{"product": "Android", "vendor": "n/a", "versions": [{"status": "affected", "version": "Android kernel"}]}], "source": "security@android.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:google:android:-:*:*:*:*:*:*:*", "matchCriteriaId": "F8B9FEC8-73B6-43B8-B24E-1F7C20D91D26", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "In do_ipt_get_ctl and do_ipt_set_ctl of ip_tables.c, there is a possible way to leak kernel information due to uninitialized data. This could lead to local information disclosure with system execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-120612905References: Upstream kernel"}, {"lang": "es", "value": "En las funciones do_ipt_get_ctl y do_ipt_set_ctl del archivo ip_tables.c, se presenta una posible forma de filtrar informaci\u00f3n del kernel debido a datos no inicializados. Esto podr\u00eda conllevar a una divulgaci\u00f3n de informaci\u00f3n local con los privilegios de ejecuci\u00f3n System requeridos. No es requerida una interacci\u00f3n del usuario para su explotaci\u00f3n. Producto: Android. Versiones: Android kernel. ID de Android: A-120612905. Referencias: Kernel ascendente"}], "id": "CVE-2021-39636", "lastModified": "2026-06-17T04:03:55.257", "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": 4.4, "baseSeverity": "MEDIUM", "confidentialityImpact": "HIGH", "integrityImpact": "NONE", "privilegesRequired": "HIGH", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N", "version": "3.1"}, "exploitabilityScore": 0.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2021-12-15T19:15:15.017", "references": [{"source": "security@android.com", "tags": ["Patch", "Vendor Advisory"], "url": "https://source.android.com/security/bulletin/pixel/2021-12-01"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch", "Vendor Advisory"], "url": "https://source.android.com/security/bulletin/pixel/2021-12-01"}], "sourceIdentifier": "security@android.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-665"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"bugzilla": {"description": "kernel: information disclosure due to uninitialized data in do_ipt_get_ctl() and do_ipt_set_ctl() in ip_tables.c", "id": "2068577", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2068577"}, "csaw": false, "cvss3": {"cvss3_base_score": "4.4", "cvss3_scoring_vector": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:N/A:N", "status": "draft"}, "cwe": "CWE-200", "details": ["In do_ipt_get_ctl and do_ipt_set_ctl of ip_tables.c, there is a possible way to leak kernel information due to uninitialized data. This could lead to local information disclosure with system execution privileges needed. User interaction is not needed for exploitation.Product: AndroidVersions: Android kernelAndroid ID: A-120612905References: Upstream kernel", "A vulnerability was found in the Linux kernel\u2019s net/ipv6/netfilter/ip6_tables.c:copy_entries_to_user function. This flaw allows a local attacker to leak internal kernel information."], "mitigation": {"lang": "en:us", "value": "To mitigate this issue, prevent the module ip6_tables from being loaded. \nPlease see https://access.redhat.com/solutions/41278 \nfor information on how to blacklist a kernel module to prevent it from loading automatically."}, "name": "CVE-2021-39636", "package_state": [{"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": "Out of support scope", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:7", "fix_state": "Out of support scope", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 7"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:8", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 8"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise Linux 9"}], "public_date": "2021-12-06T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-39636\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-39636\nhttps://android.googlesource.com/kernel/common/+/823f05d71506017aa4d47ae8b9546081686098fe\nhttps://android.googlesource.com/kernel/common/+/8a1b3c7bd71ef1e7a4537216858dbe7d13eec6ed\nhttps://android.googlesource.com/kernel/common/+/bb5bc03a5056b4b22f00b7333c42c861b83ef19f\nhttps://android.googlesource.com/kernel/common/+/d104670ce30b9f910f39fbaad3ec59f87fa43468\nhttps://android.googlesource.com/kernel/common/+/dcd0c8c3e87cf08344e169fdb94eb7ec96c3c32a\nhttps://source.android.com/security/bulletin/pixel/2021-12-01"], "threat_severity": "Moderate"}

{}