CVE-2021-44142

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uses extended file attributes (EA, xattr) to provide \"...enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver.\" Samba versions prior to 4.13.17, 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via specially crafted extended file attributes. A remote attacker with write access to extended file attributes can execute arbitrary code with the privileges of smbd, typically root."}, {"lang": "es", "value": "El m\u00f3dulo vfs_fruit de Samba usa atributos de archivo extendidos (EA, xattr) para proporcionar \"...compatibilidad mejorada con los clientes SMB de Apple e interoperabilidad con un servidor de archivos AFP de Netatalk 3\". Samba versiones anteriores a 4.13.17, 4.14.12 y 4.15.5 con vfs_fruit configurado permiten una lectura y escritura fuera de l\u00edmites de la pila por medio de atributos de archivo extendidos especialmente dise\u00f1ados. Un atacante remoto con acceso de escritura a los atributos de archivo extendidos puede ejecutar c\u00f3digo arbitrario con los privilegios de smbd, t\u00edpicamente root"}], "id": "CVE-2021-44142", "lastModified": "2026-06-17T04:11:56.700", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "COMPLETE", "baseScore": 9.0, "confidentialityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "vectorString": "AV:N/AC:L/Au:S/C:C/I:C/A:C", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 10.0, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "nvd@nist.gov", "type": "Primary"}, {"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 8.8, "baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 5.9, "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "type": "Secondary"}], "ssvcV203": [{"source": "134c704f-9b21-4f2e-91b3-4a467353bcc0", "ssvcData": {"id": "CVE-2021-44142", "options": [{"exploitation": "none"}, {"automatable": "no"}, {"technicalImpact": "total"}], "role": "CISA Coordinator", "timestamp": "2025-04-23T13:30:59.386639Z", "version": "2.0.3"}}]}, "published": "2022-02-21T15:15:07.380", "references": [{"source": "secalert@redhat.com", "url": "https://bugzilla.samba.org/show_bug.cgi?id=14914"}, {"source": "secalert@redhat.com", "url": "https://kb.cert.org/vuls/id/119678"}, {"source": "secalert@redhat.com", "url": "https://security.gentoo.org/glsa/202309-06"}, {"source": "secalert@redhat.com", "url": "https://www.samba.org/samba/security/CVE-2021-44142.html"}, {"source": "secalert@redhat.com", "url": "https://www.zerodayinitiative.com/blog/2022/2/1/cve-2021-44142-details-on-a-samba-code-execution-bug-demonstrated-at-pwn2own-austin"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://bugzilla.samba.org/show_bug.cgi?id=14914"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://kb.cert.org/vuls/id/119678"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://security.gentoo.org/glsa/202309-06"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.kb.cert.org/vuls/id/119678"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.samba.org/samba/security/CVE-2021-44142.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://www.zerodayinitiative.com/blog/2022/2/1/cve-2021-44142-details-on-a-samba-code-execution-bug-demonstrated-at-pwn2own-austin"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-787"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-125"}, {"lang": "en", "value": "CWE-787"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank Orange Tsai (DEVCORE) for reporting this issue. Upstream acknowledges the Samba project as the original reporter.", "affected_release": [{"advisory": "RHSA-2022:0328", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "samba-0:4.10.16-18.el7_9", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2022-01-31T00:00:00Z"}, {"advisory": "RHSA-2022:0663", "cpe": "cpe:/o:redhat:rhel_aus:7.6", "package": "samba-0:4.8.3-7.el7_6", "product_name": "Red Hat Enterprise Linux 7.6 Advanced Update Support(Disable again in 2026 - SPRHEL-7118)", "release_date": "2022-02-23T00:00:00Z"}, {"advisory": "RHSA-2022:0663", "cpe": "cpe:/o:redhat:rhel_tus:7.6", "package": "samba-0:4.8.3-7.el7_6", "product_name": "Red Hat Enterprise Linux 7.6 Telco Extended Update Support", "release_date": "2022-02-23T00:00:00Z"}, {"advisory": "RHSA-2022:0663", "cpe": "cpe:/o:redhat:rhel_e4s:7.6", "package": "samba-0:4.8.3-7.el7_6", "product_name": "Red Hat Enterprise Linux 7.6 Update Services for SAP Solutions", "release_date": "2022-02-23T00:00:00Z"}, {"advisory": "RHSA-2022:0664", "cpe": "cpe:/o:redhat:rhel_aus:7.7", "package": "samba-0:4.9.1-12.el7_7", "product_name": "Red Hat Enterprise Linux 7.7 Advanced Update Support", "release_date": "2022-02-23T00:00:00Z"}, {"advisory": "RHSA-2022:0664", "cpe": "cpe:/o:redhat:rhel_tus:7.7", "package": "samba-0:4.9.1-12.el7_7", "product_name": "Red Hat Enterprise Linux 7.7 Telco Extended Update Support", "release_date": "2022-02-23T00:00:00Z"}, {"advisory": "RHSA-2022:0664", "cpe": "cpe:/o:redhat:rhel_e4s:7.7", "package": "samba-0:4.9.1-12.el7_7", "product_name": "Red Hat Enterprise Linux 7.7 Update Services for SAP Solutions", "release_date": "2022-02-23T00:00:00Z"}, {"advisory": "RHSA-2022:0332", "cpe": "cpe:/a:redhat:enterprise_linux:8", "package": "samba-0:4.14.5-9.el8_5", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-01-31T00:00:00Z"}, {"advisory": "RHSA-2022:0332", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "samba-0:4.14.5-9.el8_5", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2022-01-31T00:00:00Z"}, {"advisory": "RHSA-2022:0329", "cpe": "cpe:/a:redhat:rhel_e4s:8.1", "package": "samba-0:4.10.4-103.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Update Services for SAP Solutions", "release_date": "2022-01-31T00:00:00Z"}, {"advisory": "RHSA-2022:0330", "cpe": "cpe:/o:redhat:rhel_eus:8.2", "package": "samba-0:4.11.2-19.el8_2", "product_name": "Red Hat Enterprise Linux 8.2 Extended Update Support", "release_date": "2022-01-31T00:00:00Z"}, {"advisory": "RHSA-2022:0331", "cpe": "cpe:/o:redhat:rhel_eus:8.4", "package": "samba-0:4.13.3-9.el8_4", "product_name": "Red Hat Enterprise Linux 8.4 Extended Update Support", "release_date": "2022-01-31T00:00:00Z"}, {"advisory": "RHSA-2022:0457", "cpe": "cpe:/a:redhat:storage:3.5:samba:el7", "package": "samba-0:4.11.6-116.el7rhgs", "product_name": "Red Hat Gluster Storage 3.5 for RHEL 7", "release_date": "2022-02-07T00:00:00Z"}, {"advisory": "RHSA-2022:0458", "cpe": "cpe:/a:redhat:storage:3.5:samba:el8", "package": "samba-0:4.14.5-206.el8rhgs", "product_name": "Red Hat Gluster Storage 3.5 for RHEL 8", "release_date": "2022-02-07T00:00:00Z"}], "bugzilla": {"description": "samba: Out-of-bounds heap read/write vulnerability in VFS module vfs_fruit allows code execution", "id": "2046146", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2046146"}, "csaw": false, "cvss3": {"cvss3_base_score": "9.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H", "status": "verified"}, "cwe": "CWE-787", "details": ["The Samba vfs_fruit module uses extended file attributes (EA, xattr) to provide \"...enhanced compatibility with Apple SMB clients and interoperability with a Netatalk 3 AFP fileserver.\" Samba versions prior to 4.13.17, 4.14.12 and 4.15.5 with vfs_fruit configured allow out-of-bounds heap read and write via specially crafted extended file attributes. A remote attacker with write access to extended file attributes can execute arbitrary code with the privileges of smbd, typically root.", "An out-of-bounds heap read write vulnerability was found in Samba. Due to a boundary error when processing EA metadata while opening files in smbd within the VFS Samba module (vfs_fruit), a remote attacker with ability to write to file's extended attributes can trigger an out-of-bounds write and execute arbitrary code with root privileges."], "mitigation": {"lang": "en:us", "value": "As a workaround remove the \"fruit\" VFS module from the list of configured VFS objects in any \"vfs objects\" line in the Samba configuration smb.conf.\nNote that changing the VFS module settings fruit:metadata or fruit:resource to use the unaffected setting causes all stored information to be inaccessible and will make it appear to macOS clients as if the information is lost."}, "name": "CVE-2021-44142", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "samba", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "package_name": "samba4", "product_name": "Red Hat Enterprise Linux 6"}, {"cpe": "cpe:/o:redhat:enterprise_linux:9", "fix_state": "Not affected", "package_name": "samba", "product_name": "Red Hat Enterprise Linux 9"}, {"cpe": "cpe:/o:redhat:rhev_hypervisor:4", "fix_state": "Not affected", "package_name": "redhat-virtualization-host", "product_name": "Red Hat Virtualization 4"}], "public_date": "2022-01-31T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2021-44142\nhttps://nvd.nist.gov/vuln/detail/CVE-2021-44142\nhttps://www.samba.org/samba/security/CVE-2021-44142.html"], "threat_severity": "Critical"}

{}