CVE-2015-7837

{"containers": {"cna": {"affected": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "datePublic": "2015-10-06T00:00:00.000Z", "descriptions": [{"lang": "en", "value": "The Linux kernel, as used in Red Hat Enterprise Linux 7, kernel-rt, and Enterprise MRG 2 and when booted with UEFI Secure Boot enabled, allows local users to bypass intended securelevel/secureboot restrictions by leveraging improper handling of secure_boot flag across kexec reboot."}], "problemTypes": [{"descriptions": [{"description": "n/a", "lang": "en", "type": "text"}]}], "providerMetadata": {"dateUpdated": "2017-09-20T09:57:01.000Z", "orgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "shortName": "mitre"}, "references": [{"tags": ["x_refsource_CONFIRM"], "url": "https://github.com/mjg59/linux/commit/4b2b64d5a6ebc84214755ebccd599baef7c1b798"}, {"tags": ["x_refsource_CONFIRM"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1272472"}, {"name": "RHSA-2015:2152", "tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "http://rhn.redhat.com/errata/RHSA-2015-2152.html"}, {"name": "77097", "tags": ["vdb-entry", "x_refsource_BID"], "url": "http://www.securityfocus.com/bid/77097"}, {"name": "[oss-security] 20151015 Re: CVE Request - Linux kernel - securelevel/secureboot bypass.", "tags": ["mailing-list", "x_refsource_MLIST"], "url": "http://www.openwall.com/lists/oss-security/2015/10/15/6"}, {"name": "RHSA-2015:2411", "tags": ["vendor-advisory", "x_refsource_REDHAT"], "url": "http://rhn.redhat.com/errata/RHSA-2015-2411.html"}], "x_legacyV4Record": {"CVE_data_meta": {"ASSIGNER": "cve@mitre.org", "ID": "CVE-2015-7837", "STATE": "PUBLIC"}, "affects": {"vendor": {"vendor_data": [{"product": {"product_data": [{"product_name": "n/a", "version": {"version_data": [{"version_value": "n/a"}]}}]}, "vendor_name": "n/a"}]}}, "data_format": "MITRE", "data_type": "CVE", "data_version": "4.0", "description": {"description_data": [{"lang": "eng", "value": "The Linux kernel, as used in Red Hat Enterprise Linux 7, kernel-rt, and Enterprise MRG 2 and when booted with UEFI Secure Boot enabled, allows local users to bypass intended securelevel/secureboot restrictions by leveraging improper handling of secure_boot flag across kexec reboot."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "eng", "value": "n/a"}]}]}, "references": {"reference_data": [{"name": "https://github.com/mjg59/linux/commit/4b2b64d5a6ebc84214755ebccd599baef7c1b798", "refsource": "CONFIRM", "url": "https://github.com/mjg59/linux/commit/4b2b64d5a6ebc84214755ebccd599baef7c1b798"}, {"name": "https://bugzilla.redhat.com/show_bug.cgi?id=1272472", "refsource": "CONFIRM", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1272472"}, {"name": "RHSA-2015:2152", "refsource": "REDHAT", "url": "http://rhn.redhat.com/errata/RHSA-2015-2152.html"}, {"name": "77097", "refsource": "BID", "url": "http://www.securityfocus.com/bid/77097"}, {"name": "[oss-security] 20151015 Re: CVE Request - Linux kernel - securelevel/secureboot bypass.", "refsource": "MLIST", "url": "http://www.openwall.com/lists/oss-security/2015/10/15/6"}, {"name": "RHSA-2015:2411", "refsource": "REDHAT", "url": "http://rhn.redhat.com/errata/RHSA-2015-2411.html"}]}}}, "adp": [{"providerMetadata": {"orgId": "af854a3a-2127-422b-91ae-364da2661108", "shortName": "CVE", "dateUpdated": "2024-08-06T07:58:59.990Z"}, "title": "CVE Program Container", "references": [{"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://github.com/mjg59/linux/commit/4b2b64d5a6ebc84214755ebccd599baef7c1b798"}, {"tags": ["x_refsource_CONFIRM", "x_transferred"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1272472"}, {"name": "RHSA-2015:2152", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"], "url": "http://rhn.redhat.com/errata/RHSA-2015-2152.html"}, {"name": "77097", "tags": ["vdb-entry", "x_refsource_BID", "x_transferred"], "url": "http://www.securityfocus.com/bid/77097"}, {"name": "[oss-security] 20151015 Re: CVE Request - Linux kernel - securelevel/secureboot bypass.", "tags": ["mailing-list", "x_refsource_MLIST", "x_transferred"], "url": "http://www.openwall.com/lists/oss-security/2015/10/15/6"}, {"name": "RHSA-2015:2411", "tags": ["vendor-advisory", "x_refsource_REDHAT", "x_transferred"], "url": "http://rhn.redhat.com/errata/RHSA-2015-2411.html"}]}]}, "cveMetadata": {"assignerOrgId": "8254265b-2729-46b6-b9e3-3dfca2d5bfca", "assignerShortName": "mitre", "cveId": "CVE-2015-7837", "datePublished": "2017-09-19T16:00:00.000Z", "dateReserved": "2015-10-15T00:00:00.000Z", "dateUpdated": "2024-08-06T07:58:59.990Z", "state": "PUBLISHED"}, "dataType": "CVE_RECORD", "dataVersion": "5.1"}

{}

{"affected": [{"affectedData": [{"product": "n/a", "vendor": "n/a", "versions": [{"status": "affected", "version": "n/a"}]}], "source": "cve@mitre.org"}], "configurations": [{"nodes": [{"cpeMatch": [{"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "142AD0DD-4CF3-4D74-9442-459CE3347E3A", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.2:*:*:*:*:*:*:*", "matchCriteriaId": "2E4DC974-235F-4655-966F-2490A4C4E490", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux:7.3:*:*:*:*:*:*:*", "matchCriteriaId": "B99A2411-7F6A-457F-A7BF-EB13C630F902", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_desktop:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "33C068A4-3780-4EAB-A937-6082DF847564", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_aus:7.3:*:*:*:*:*:*:*", "matchCriteriaId": "98381E61-F082-4302-B51F-5648884F998B", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_server_aus:7.4:*:*:*:*:*:*:*", "matchCriteriaId": "D99A687E-EAE6-417E-A88E-D0082BC194CD", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_linux_workstation:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "825ECE2D-E232-46E0-A047-074B34DB1E97", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:enterprise_mrg:2.0:*:*:*:*:*:*:*", "matchCriteriaId": "C60FA8B1-1802-4522-A088-22171DCF7A93", "vulnerable": true}, {"criteria": "cpe:2.3:o:redhat:kernel-rt:7.0:*:*:*:*:*:*:*", "matchCriteriaId": "91CBEE52-268D-4EA2-8DEB-090F88BA50CF", "vulnerable": true}], "negate": false, "operator": "OR"}]}], "cveTags": [], "descriptions": [{"lang": "en", "value": "The Linux kernel, as used in Red Hat Enterprise Linux 7, kernel-rt, and Enterprise MRG 2 and when booted with UEFI Secure Boot enabled, allows local users to bypass intended securelevel/secureboot restrictions by leveraging improper handling of secure_boot flag across kexec reboot."}, {"lang": "es", "value": "El kernel de Linux, tal y como se emplea en Red Hat Enterprise Linux 7, kernel-rt y Enterprise MRG 2 y cuando se emplea con UEFI Secure Boot habilitado, permite que usuarios locales omitan las restricciones securelevel/secureboot previstas aprovechando la gesti\u00f3n incorrecta de la marca secure_boot cuando se reinicia kexec."}], "id": "CVE-2015-7837", "lastModified": "2026-06-17T00:33:13.907", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "LOW", "cvssData": {"accessComplexity": "LOW", "accessVector": "LOCAL", "authentication": "NONE", "availabilityImpact": "NONE", "baseScore": 2.1, "confidentialityImpact": "NONE", "integrityImpact": "PARTIAL", "vectorString": "AV:L/AC:L/Au:N/C:N/I:P/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}], "cvssMetricV30": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "LOCAL", "availabilityImpact": "NONE", "baseScore": 5.5, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "HIGH", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.0/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:N", "version": "3.0"}, "exploitabilityScore": 1.8, "impactScore": 3.6, "source": "nvd@nist.gov", "type": "Primary"}]}, "published": "2017-09-19T16:29:00.230", "references": [{"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "http://rhn.redhat.com/errata/RHSA-2015-2152.html"}, {"source": "cve@mitre.org", "tags": ["Vendor Advisory"], "url": "http://rhn.redhat.com/errata/RHSA-2015-2411.html"}, {"source": "cve@mitre.org", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2015/10/15/6"}, {"source": "cve@mitre.org", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/77097"}, {"source": "cve@mitre.org", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1272472"}, {"source": "cve@mitre.org", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://github.com/mjg59/linux/commit/4b2b64d5a6ebc84214755ebccd599baef7c1b798"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "http://rhn.redhat.com/errata/RHSA-2015-2152.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Vendor Advisory"], "url": "http://rhn.redhat.com/errata/RHSA-2015-2411.html"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Mailing List", "Third Party Advisory"], "url": "http://www.openwall.com/lists/oss-security/2015/10/15/6"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Third Party Advisory", "VDB Entry"], "url": "http://www.securityfocus.com/bid/77097"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Vendor Advisory"], "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1272472"}, {"source": "af854a3a-2127-422b-91ae-364da2661108", "tags": ["Issue Tracking", "Third Party Advisory"], "url": "https://github.com/mjg59/linux/commit/4b2b64d5a6ebc84214755ebccd599baef7c1b798"}], "sourceIdentifier": "cve@mitre.org", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-254"}], "source": "nvd@nist.gov", "type": "Primary"}]}

{"acknowledgement": "Red Hat would like to thank Linn Crosetto (HP) for reporting this issue.", "affected_release": [{"advisory": "RHSA-2015:2411", "cpe": "cpe:/a:redhat:rhel_extras_rt:7", "package": "kernel-rt-0:3.10.0-327.rt56.204.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2015-11-19T00:00:00Z"}, {"advisory": "RHSA-2015:2152", "cpe": "cpe:/o:redhat:enterprise_linux:7", "package": "kernel-0:3.10.0-327.el7", "product_name": "Red Hat Enterprise Linux 7", "release_date": "2015-11-19T00:00:00Z"}], "bugzilla": {"description": "kernel: securelevel disabled after kexec", "id": "1272472", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1272472"}, "csaw": false, "cvss": {"cvss_base_score": "1.9", "cvss_scoring_vector": "AV:L/AC:M/Au:N/C:N/I:P/A:N", "status": "verified"}, "cwe": "CWE-456", "details": ["The Linux kernel, as used in Red Hat Enterprise Linux 7, kernel-rt, and Enterprise MRG 2 and when booted with UEFI Secure Boot enabled, allows local users to bypass intended securelevel/secureboot restrictions by leveraging improper handling of secure_boot flag across kexec reboot.", "A flaw was found in the way the Linux kernel handled the securelevel functionality after performing a kexec operation. A local attacker could use this flaw to bypass the security mechanism of the securelevel/secureboot combination."], "name": "CVE-2015-7837", "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:/a:redhat:enterprise_mrg:2", "fix_state": "Affected", "package_name": "kernel-rt", "product_name": "Red Hat Enterprise MRG 2"}], "public_date": "2015-10-14T00:00:00Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2015-7837\nhttps://nvd.nist.gov/vuln/detail/CVE-2015-7837"], "statement": "This issue does not affect the Linux kernels as shipped with Red Hat Enterprise Linux 5 and 6.\nThis issue affects the Linux kernels as shipped with Red Hat Enterprise Linux 7, kernel-rt and MRG-2.", "threat_severity": "Low"}

{}