CVE-2018-1095

{"containers": {"cna": {"affected": [{"product": "Linux kernel through version 4.15", "vendor": "n/a", "versions": [{"status": "affected", "version": "Linux kernel through version 4.15"}]}], "datePublic": "2018-04-01T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "The ext4_xattr_check_entries function in fs/ext4/xattr.c in the Linux kernel through 4.15.15 does not properly validate xattr sizes, which causes misinterpretation of a size as an error code, and consequently allows attackers to cause a denial of service (get_acl NULL pointer dereference and system crash) via a crafted ext4 image."}], "problemTypes": [{"descriptions": [{"description": "NULL pointer dereference", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2018-10-31T09:57:01.000Z", "orgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "shortName": "redhat"}, "references": [{"tags": ["x_refsource_MISC"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=ce3fd194fcc6fbdc00ce095a852f22df97baa401"}, {"tags": ["x_refsource_MISC"], "url": "http://openwall.com/lists/oss-security/2018/03/29/1"}, {"name": "USN-3695-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU"], "url": "https://usn.ubuntu.com/3695-1/"}, {"name": "USN-3695-2", "tags": ["vendor-advisory", "x_refsource_UBUNTU"], "url": "https://usn.ubuntu.com/3695-2/"}, {"name": "RHSA-2018:2948", "tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "https://access.redhat.com/errata/RHSA-2018:2948"}, {"tags": ["x_refsource_MISC"], "url": "https://bugzilla.kernel.org/show_bug.cgi?id=199185"}, {"tags": ["x_refsource_MISC"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1560793"}]}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-05T03:51:48.616Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=ce3fd194fcc6fbdc00ce095a852f22df97baa401"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "http://openwall.com/lists/oss-security/2018/03/29/1"}, {"name": "USN-3695-1", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "https://usn.ubuntu.com/3695-1/"}, {"name": "USN-3695-2", "tags": ["vendor-advisory", "x_refsource_UBUNTU", "x_transferred"], "url": "https://usn.ubuntu.com/3695-2/"}, {"name": "RHSA-2018:2948", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"], "url": "https://access.redhat.com/errata/RHSA-2018:2948"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://bugzilla.kernel.org/show_bug.cgi?id=199185"}, {"tags": ["x_refsource_MISC", "x_transferred"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1560793"}]}]}, "cveMetadata": {"assignerOrgId": "53f830b8-0a3f-465b-8143-3b8a9948e749", "assignerShortName": "redhat", "cveId": "CVE-2018-1095", "datePublished": "2018-04-02T03:00:00.000Z", "dateReserved": "2017-12-04T00:00:00.000Z", "dateUpdated": "2024-08-05T03:51:48.616Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

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{"affected": [{"affectedData": [{"product": "Linux kernel through version 4.15", "vendor": "n/a", "versions": [{"status": "affected", "version": "Linux kernel through version 4.15"}]}], "source": "secalert@redhat.com"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "matchCriteriaId": "EA4F2AD9-993F-4246-B6F9-7723FF82AF6C", "versionEndIncluding": "4.15.15", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The ext4_xattr_check_entries function in fs/ext4/xattr.c in the Linux kernel through 4.15.15 does not properly validate xattr sizes, which causes misinterpretation of a size as an error code, and consequently allows attackers to cause a denial of service (get_acl NULL pointer dereference and system crash) via a crafted ext4 image."}, {"lang": "es", "value": "La funci\u00f3n ext4_xattr_check_entries en fs/ext4/xattr.c en el kernel de Linux hasta la versi\u00f3n 4.15.15 no valida correctamente los tama\u00f1os de xattr, lo que provoca una malinterpretaci\u00f3n de un tama\u00f1o como un c\u00f3digo de error y, en consecuencia, permite que los atacantes provoquen una denegaci\u00f3n de servicio (desreferencia de puntero NULL en get_acl y cierre inesperado del sistema) mediante una imagen ext4 manipulada."}], "id": "CVE-2018-1095", "lastModified": "2026-06-17T01:50:28.177", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "HIGH", "cvssData": {"accessComplexity": "MEDIUM", "accessVector": "NETWORK", "authentication": "NONE", "availabilityImpact": "COMPLETE", "baseScore": 7.1, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:M/Au:N/C:N/I:N/A:C", "version": "2.0"}, "exploitabilityScore": 8.6, "impactScore": 6.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "nvd@nist.gov", "type": "Primary", "userInteractionRequired": true}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "NONE", "scope": "UNCHANGED", "userInteraction": "REQUIRED", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H", "version": "3.0"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2018-04-02T03:29:00.433", "references": [{"source": "secalert@redhat.com", "tags": ["Mailing List"], "url": "http://openwall.com/lists/oss-security/2018/03/29/1"}, {"source": "secalert@redhat.com", "url": "https://access.redhat.com/errata/RHSA-2018:2948"}, {"source": "secalert@redhat.com", "tags": ["Exploit", "Issue Tracking"], "url": "https://bugzilla.kernel.org/show_bug.cgi?id=199185"}, {"source": "secalert@redhat.com", "tags": ["Issue Tracking"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1560793"}, {"source": "secalert@redhat.com", "tags": ["Patch"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=ce3fd194fcc6fbdc00ce095a852f22df97baa401"}, {"source": "secalert@redhat.com", "url": "https://usn.ubuntu.com/3695-1/"}, {"source": "secalert@redhat.com", "url": "https://usn.ubuntu.com/3695-2/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List"], "url": "http://openwall.com/lists/oss-security/2018/03/29/1"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://access.redhat.com/errata/RHSA-2018:2948"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Exploit", "Issue Tracking"], "url": "https://bugzilla.kernel.org/show_bug.cgi?id=199185"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1560793"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Patch"], "url": "https://git.kernel.org/pub/scm/linux/kernel/git/tytso/ext4.git/commit/?id=ce3fd194fcc6fbdc00ce095a852f22df97baa401"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://usn.ubuntu.com/3695-1/"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "url": "https://usn.ubuntu.com/3695-2/"}], "sourceIdentifier": "secalert@redhat.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-476"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank Wen Xu for reporting this issue.", "affected_release": [{"advisory": "RHSA-2018:2948", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-alt-0:4.14.0-115.el7a", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2018-10-30T00:00:00Z"}], "bugzilla": {"description": "kernel: out-of-bound access in fs/posix_acl.c:get_acl() causes crash with crafted ext4 image", "id": "1560793", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1560793"}, "csaw": false, "cvss3": {"cvss3_base_score": "5.2", "cvss3_scoring_vector": "CVSS:3.0/AV:P/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:H", "status": "verified"}, "cwe": "CWE-476", "details": ["The ext4_xattr_check_entries function in fs/ext4/xattr.c in the Linux kernel through 4.15.15 does not properly validate xattr sizes, which causes misinterpretation of a size as an error code, and consequently allows attackers to cause a denial of service (get_acl NULL pointer dereference and system crash) via a crafted ext4 image.", "The Linux kernel is vulnerable to an out-of-bound access bug in the fs/posix_acl.c:get_acl() function. An attacker could trick a legitimate user or a privileged attacker could exploit this to cause a system crash or other unspecified impact with a crafted ext4 image. Due to the nature of the flaw, privilege escalation cannot be fully ruled out, although we believe it is unlikely."], "name": "CVE-2018-1095", "package_state": [{"cpe": "cpe:/o:redhat:enterprise_linux:5", "fix_state": "Not affected", "package_name": "kernel", "product_name": "Red Hat Enterprise Linux 5"}, {"cpe": "cpe:/o:redhat:enterprise_linux:6", "fix_state": "Not affected", "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-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:/a:redhat:enterprise_mrg:2", "fix_state": "Not affected", "package_name": "realtime-kernel", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2018-03-22T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2018-1095\nhttps://nvd.nist.gov/vuln/detail/CVE-2018-1095"], "threat_severity": "Low"}

{}