CVE-2019-20908

{"cve": {"data_type": "CVE", "references": {"reference_data": [{"url": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e", "name": "https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=1957a85b0032a81e6482ca4aab883643b8dae06e", "tags": ["Patch", "Vendor Advisory"], "refsource": "MISC"}, {"url": "https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh", "name": "https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh", "tags": ["Patch", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html", "name": "https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MISC"}, {"url": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4", "name": "https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4", "tags": ["Release Notes", "Vendor Advisory"], "refsource": "MISC"}, {"url": "http://www.openwall.com/lists/oss-security/2020/07/20/6", "name": "[oss-security] 20200720 Re: Re: lockdown bypass on ubuntu 18.04's 4.15 kernel for loading unsigned modules", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "https://usn.ubuntu.com/4427-1/", "name": "USN-4427-1", "tags": ["Third Party Advisory"], "refsource": "UBUNTU"}, {"url": "http://www.openwall.com/lists/oss-security/2020/07/29/3", "name": "[oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "http://www.openwall.com/lists/oss-security/2020/07/30/2", "name": "[oss-security] 20200730 UEFI SecureBoot bypass fixes rolled out to kernels below radar", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "http://www.openwall.com/lists/oss-security/2020/07/30/3", "name": "[oss-security] 20200730 Re: UEFI SecureBoot bypass fixes rolled out to kernels below radar", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "MLIST"}, {"url": "https://usn.ubuntu.com/4439-1/", "name": "USN-4439-1", "tags": ["Third Party Advisory"], "refsource": "UBUNTU"}, {"url": "https://usn.ubuntu.com/4426-1/", "name": "USN-4426-1", "tags": ["Third Party Advisory"], "refsource": "UBUNTU"}, {"url": "https://usn.ubuntu.com/4440-1/", "name": "USN-4440-1", "tags": ["Third Party Advisory"], "refsource": "UBUNTU"}, {"url": "http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html", "name": "openSUSE-SU-2020:1153", "tags": ["Mailing List", "Third Party Advisory"], "refsource": "SUSE"}]}, "data_format": "MITRE", "description": {"description_data": [{"lang": "en", "value": "An issue was discovered in drivers/firmware/efi/efi.c in the Linux kernel before 5.4. Incorrect access permissions for the efivar_ssdt ACPI variable could be used by attackers to bypass lockdown or secure boot restrictions, aka CID-1957a85b0032."}]}, "problemtype": {"problemtype_data": [{"description": [{"lang": "en", "value": "NVD-CWE-noinfo"}]}]}, "data_version": "4.0", "CVE_data_meta": {"ID": "CVE-2019-20908", "ASSIGNER": "cve@mitre.org"}}, "impact": {"baseMetricV2": {"cvssV2": {"version": "2.0", "baseScore": 6.9, "accessVector": "LOCAL", "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "authentication": "NONE", "integrityImpact": "COMPLETE", "accessComplexity": "MEDIUM", "availabilityImpact": "COMPLETE", "confidentialityImpact": "COMPLETE"}, "severity": "MEDIUM", "acInsufInfo": false, "impactScore": 10.0, "obtainAllPrivilege": false, "exploitabilityScore": 3.4, "obtainUserPrivilege": false, "obtainOtherPrivilege": false, "userInteractionRequired": false}, "baseMetricV3": {"cvssV3": {"scope": "UNCHANGED", "version": "3.1", "baseScore": 6.7, "attackVector": "LOCAL", "baseSeverity": "MEDIUM", "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H", "integrityImpact": "HIGH", "userInteraction": "NONE", "attackComplexity": "LOW", "availabilityImpact": "HIGH", "privilegesRequired": "HIGH", "confidentialityImpact": "HIGH"}, "impactScore": 5.9, "exploitabilityScore": 0.8}}, "publishedDate": "2020-07-15T22:15Z", "configurations": {"nodes": [{"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:linux:linux_kernel:*:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true, "versionEndExcluding": "5.4"}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:opensuse:leap:15.1:*:*:*:*:*:*:*", "cpe_name": [], "vulnerable": true}]}, {"children": [], "operator": "OR", "cpe_match": [{"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:16.04:*:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true}, {"cpe23Uri": "cpe:2.3:o:canonical:ubuntu_linux:18.04:*:*:*:lts:*:*:*", "cpe_name": [], "vulnerable": true}]}], "CVE_data_version": "4.0"}, "lastModifiedDate": "2021-07-21T11:39Z"}