CVE-2020-10711

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This flaw occurs while importing the Commercial IP Security Option (CIPSO) protocol's category bitmap into the SELinux extensible bitmap via the' ebitmap_netlbl_import' routine. While processing the CIPSO restricted bitmap tag in the 'cipso_v4_parsetag_rbm' routine, it sets the security attribute to indicate that the category bitmap is present, even if it has not been allocated. This issue leads to a NULL pointer dereference issue while importing the same category bitmap into SELinux. This flaw allows a remote network user to crash the system kernel, resulting in a denial of service."}, {"lang": "es", "value": "Se encontr\u00f3 un fallo de desreferencia de puntero NULL en el subsistema SELinux del kernel de Linux en versiones anteriores a 5.7. Este fallo se produce al importar la categor\u00eda de protocolo Commercial IP Security Option (CIPSO) en el mapa de bits extensible de SELinux por medio de la rutina \"ebitmap_netlbl_import\". Mientras procesa la etiqueta de mapa de bits restringido CIPSO en la rutina \"cipso_v4_parsetag_rbm\", establece el atributo de seguridad para indicar que la categor\u00eda de mapa de bits est\u00e1 presente, incluso si no ha sido asignada. Esto conlleva a un problema de desreferencia de puntero NULL al importar el mismo mapa de bits de categor\u00eda hacia SELinux. Este fallo permite a un usuario remoto de la red bloquear el kernel del sistema, resultando en una denegaci\u00f3n de servicio."}], "id": "CVE-2020-10711", "lastModified": "2026-06-17T02:48:17.860", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "PARTIAL", "baseScore": 4.3, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "HIGH", "attackVector": "NETWORK", "availabilityImpact": "HIGH", "baseScore": 5.9, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", 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["Third Party Advisory"], "url": "https://usn.ubuntu.com/4419-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2020/dsa-4698"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory"], "url": "https://www.debian.org/security/2020/dsa-4699"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Patch", "Third Party Advisory"], "url": "https://www.openwall.com/lists/oss-security/2020/05/12/2"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "secalert@redhat.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank Matthew Sheets (gd-ms.com) for reporting this issue.", "affected_release": [{"advisory": "RHSA-2020:2103", "cpe": "cpe:/o:redhat:enterprise_linux:6", "package": "kernel-0:2.6.32-754.29.2.el6", "product_name": "Red Hat Enterprise Linux 6", "release_date": "2020-05-12T00:00:00Z"}, {"advisory": "RHSA-2020:2085", "cpe": "cpe:/a:redhat:rhel_extras_rt:7", "package": "kernel-rt-0:3.10.0-1127.8.2.rt56.1103.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-05-12T00:00:00Z"}, {"advisory": "RHSA-2020:2082", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-1127.8.2.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-05-12T00:00:00Z"}, {"advisory": "RHSA-2020:2104", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-alt-0:4.14.0-115.21.2.el7a", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2020-05-12T00:00:00Z"}, {"advisory": "RHSA-2020:2285", "cpe": "cpe:/o:redhat:rhel_aus:7.2", "package": "kernel-0:3.10.0-327.88.1.el7", "product_name": "Red Hat Enterprise Linux 7.2 Advanced Update Support", "release_date": "2020-05-26T00:00:00Z"}, {"advisory": "RHSA-2020:2277", "cpe": "cpe:/o:redhat:rhel_aus:7.3", "package": "kernel-0:3.10.0-514.76.1.el7", "product_name": "Red Hat Enterprise Linux 7.3 Advanced Update Support", "release_date": "2020-05-26T00:00:00Z"}, {"advisory": "RHSA-2020:2277", "cpe": "cpe:/o:redhat:rhel_tus:7.3", "package": "kernel-0:3.10.0-514.76.1.el7", "product_name": "Red Hat Enterprise Linux 7.3 Telco Extended Update Support", "release_date": "2020-05-26T00:00:00Z"}, {"advisory": "RHSA-2020:2277", "cpe": "cpe:/o:redhat:rhel_e4s:7.3", "package": "kernel-0:3.10.0-514.76.1.el7", "product_name": "Red Hat Enterprise Linux 7.3 Update Services for SAP Solutions", "release_date": "2020-05-26T00:00:00Z"}, {"advisory": "RHSA-2020:2214", "cpe": "cpe:/o:redhat:rhel_aus:7.4", "package": "kernel-0:3.10.0-693.67.1.el7", "product_name": "Red Hat Enterprise Linux 7.4 Advanced Update Support", "release_date": "2020-05-19T00:00:00Z"}, {"advisory": "RHSA-2020:2214", "cpe": "cpe:/o:redhat:rhel_tus:7.4", "package": "kernel-0:3.10.0-693.67.1.el7", "product_name": "Red Hat Enterprise Linux 7.4 Telco Extended Update Support", "release_date": "2020-05-19T00:00:00Z"}, {"advisory": "RHSA-2020:2214", "cpe": "cpe:/o:redhat:rhel_e4s:7.4", "package": "kernel-0:3.10.0-693.67.1.el7", "product_name": "Red Hat Enterprise Linux 7.4 Update Services for SAP Solutions", "release_date": "2020-05-19T00:00:00Z"}, {"advisory": "RHSA-2020:2289", "cpe": "cpe:/o:redhat:rhel_eus:7.6", "package": "kernel-0:3.10.0-957.54.1.el7", "product_name": "Red Hat Enterprise Linux 7.6 Extended Update Support", "release_date": "2020-05-26T00:00:00Z"}, {"advisory": "RHSA-2020:2291", "cpe": "cpe:/o:redhat:rhel_eus:7.6", "package": "kpatch-patch", "product_name": "Red Hat Enterprise Linux 7.6 Extended Update Support", "release_date": "2020-05-26T00:00:00Z"}, {"advisory": "RHSA-2020:2519", "cpe": "cpe:/o:redhat:rhel_eus:7.7", "package": "kpatch-patch", "product_name": "Red Hat Enterprise Linux 7.7 Extended Update Support", "release_date": "2020-06-12T00:00:00Z"}, {"advisory": "RHSA-2020:2522", "cpe": "cpe:/o:redhat:rhel_eus:7.7", "package": "kernel-0:3.10.0-1062.26.1.el7", "product_name": "Red Hat Enterprise Linux 7.7 Extended Update Support", "release_date": "2020-06-11T00:00:00Z"}, {"advisory": "RHSA-2020:2171", "cpe": "cpe:/a:redhat:enterprise_linux:8::nfv", "package": "kernel-rt-0:4.18.0-193.1.2.rt13.53.el8_2", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-05-14T00:00:00Z"}, {"advisory": "RHSA-2020:2102", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kernel-0:4.18.0-193.1.2.el8_2", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-05-12T00:00:00Z"}, {"advisory": "RHSA-2020:2125", "cpe": "cpe:/o:redhat:enterprise_linux:8", "package": "kpatch-patch", "product_name": "Red Hat Enterprise Linux 8", "release_date": "2020-05-13T00:00:00Z"}, {"advisory": "RHSA-2020:2429", "cpe": "cpe:/o:redhat:rhel_e4s:8.0", "package": "kernel-0:4.18.0-80.23.2.el8_0", "product_name": "Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions", "release_date": "2020-06-09T00:00:00Z"}, {"advisory": "RHSA-2020:2199", "cpe": "cpe:/o:redhat:rhel_eus:8.1", "package": "kernel-0:4.18.0-147.13.2.el8_1", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2020-05-19T00:00:00Z"}, {"advisory": "RHSA-2020:2203", "cpe": "cpe:/o:redhat:rhel_eus:8.1", "package": "kpatch-patch", "product_name": "Red Hat Enterprise Linux 8.1 Extended Update Support", "release_date": "2020-05-20T00:00:00Z"}, {"advisory": "RHSA-2020:2242", "cpe": "cpe:/a:redhat:enterprise_mrg:2:server:el6", "package": "kernel-rt-1:3.10.0-693.67.1.rt56.665.el6rt", "product_name": "Red Hat Enterprise MRG 2", "release_date": "2020-05-20T00:00:00Z"}, {"advisory": "RHSA-2020:2289", "cpe": "cpe:/o:redhat:enterprise_linux:7::hypervisor", "package": "kernel-0:3.10.0-957.54.1.el7", "product_name": "Red Hat Virtualization 4.2 for Red Hat Enterprise Linux 7.6 EUS", "release_date": "2020-05-26T00:00:00Z"}], "bugzilla": {"description": "Kernel: NetLabel: null pointer dereference while receiving CIPSO packet with null category may cause kernel panic", "id": "1825116", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1825116"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.9", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H", "status": "verified"}, "cwe": "CWE-476", "details": ["A NULL pointer dereference flaw was found in the Linux kernel's SELinux subsystem in versions before 5.7. This flaw occurs while importing the Commercial IP Security Option (CIPSO) protocol's category bitmap into the SELinux extensible bitmap via the' ebitmap_netlbl_import' routine. While processing the CIPSO restricted bitmap tag in the 'cipso_v4_parsetag_rbm' routine, it sets the security attribute to indicate that the category bitmap is present, even if it has not been allocated. This issue leads to a NULL pointer dereference issue while importing the same category bitmap into SELinux. This flaw allows a remote network user to crash the system kernel, resulting in a denial of service.", "A NULL pointer dereference flaw was found in the Linux kernel's SELinux subsystem. This flaw occurs while importing the Commercial IP Security Option (CIPSO) protocol's category bitmap into the SELinux extensible bitmap via the' ebitmap_netlbl_import' routine. While processing the CIPSO restricted bitmap tag in the 'cipso_v4_parsetag_rbm' routine, it sets the security attribute to indicate that the category bitmap is present, even if it has not been allocated. This issue leads to a NULL pointer dereference issue while importing the same category bitmap into SELinux. This flaw allows a remote network user to crash the system kernel, resulting in a denial of service."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options don't meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.\nThis issue can only be resolved by applying updates."}, "name": "CVE-2020-10711", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}], "public_date": "2020-05-12T12:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2020-10711\nhttps://nvd.nist.gov/vuln/detail/CVE-2020-10711"], "statement": "This issue affects the versions of the kernel packages as shipped with the Red Hat Enterprise Linux 6 starting with the Red Hat Enterprise Linux 6.7 GA version kernel-2.6.32-573 . Prior Red Hat Enterprise Linux 6 kernel versions are not affected.", "threat_severity": "Important"}

{}