A flaw was found in grub2 in versions prior to 2.06. The cutmem command does not honor secure boot locking allowing an privileged attacker to remove address ranges from memory creating an opportunity to circumvent SecureBoot protections after proper triage about grub's memory layout. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.
{"ubuntucve": [{"lastseen": "2023-12-02T14:08:29", "description": "A flaw was found in grub2 in versions prior to 2.06. The cutmem command\ndoes not honor secure boot locking allowing an privileged attacker to\nremove address ranges from memory creating an opportunity to circumvent\nSecureBoot protections after proper triage about grub's memory layout. The\nhighest threat from this vulnerability is to data confidentiality and\nintegrity as well as system availability.\n\n#### Notes\n\nAuthor| Note \n---|--- \n[sbeattie](<https://launchpad.net/~sbeattie>) | grub2-unsigned will contain fixes and supersede grub2, which will contain only BIOS grub bits.\n", "cvss3": {"exploitabilityScore": 0.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "HIGH", "scope": "CHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 6.0}, "published": "2021-03-02T00:00:00", "type": "ubuntucve", "title": "CVE-2020-27779", "bulletinFamily": "info", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 3.4, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 6.9, "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-27779"], "modified": "2021-03-02T00:00:00", "id": "UB:CVE-2020-27779", "href": "https://ubuntu.com/security/CVE-2020-27779", "cvss": {"score": 6.9, "vector": "AV:L/AC:M/Au:N/C:C/I:C/A:C"}}], "veracode": [{"lastseen": "2023-04-18T06:57:24", "description": "grub is vulnerable to arbitrary code execution. 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The highest threat from this vulnerability is to data confidentiality and integrity, as well as system availability.\n", "cvss3": {"exploitabilityScore": 1.5, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "LOW", "scope": "CHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "baseScore": 8.2, "vectorString": "CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 6.0}, "published": "2021-03-02T18:03:04", "type": "redhatcve", "title": "CVE-2020-14372", "bulletinFamily": "info", "cvss2": {"severity": "HIGH", "exploitabilityScore": 3.9, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "LOW", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 7.2, "vectorString": "AV:L/AC:L/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-10713", "CVE-2020-14372", "CVE-2020-25632", "CVE-2020-25647", "CVE-2020-27749", "CVE-2020-27779", "CVE-2021-20225", "CVE-2021-20233"], "modified": "2023-11-16T17:15:27", "id": "RH:CVE-2020-14372", "href": "https://access.redhat.com/security/cve/cve-2020-14372", "cvss": {"score": 7.2, "vector": "AV:L/AC:L/Au:N/C:C/I:C/A:C"}}], "alpinelinux": [{"lastseen": "2023-12-02T17:25:17", "description": "A flaw was found in grub2 in versions prior to 2.06. 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A patched version of the package is available.", "cvss3": {"exploitabilityScore": 0.8, "cvssV3": {"baseSeverity": "HIGH", "confidentialityImpact": "HIGH", "attackComplexity": "HIGH", "scope": "CHANGED", "attackVector": "LOCAL", "availabilityImpact": "HIGH", "integrityImpact": "HIGH", "privilegesRequired": "HIGH", "baseScore": 7.5, "vectorString": "CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H", "version": "3.1", "userInteraction": "NONE"}, "impactScore": 6.0}, "published": "2022-04-26T20:17:11", "type": "cbl_mariner", "title": "CVE-2020-27779 affecting package grub2 2.06~rc1-7", "bulletinFamily": "unix", "cvss2": {"severity": "MEDIUM", "exploitabilityScore": 3.4, "obtainAllPrivilege": false, "userInteractionRequired": false, "obtainOtherPrivilege": false, "cvssV2": {"accessComplexity": "MEDIUM", "confidentialityImpact": "COMPLETE", "availabilityImpact": "COMPLETE", "integrityImpact": "COMPLETE", "baseScore": 6.9, "vectorString": "AV:L/AC:M/Au:N/C:C/I:C/A:C", "version": "2.0", "accessVector": "LOCAL", "authentication": "NONE"}, "impactScore": 10.0, "acInsufInfo": false, "obtainUserPrivilege": false}, "cvelist": ["CVE-2020-27779"], "modified": "2022-04-26T20:17:11", "id": "CBLMARINER:6464", "href": "", "cvss": {"score": 6.9, "vector": "AV:L/AC:M/Au:N/C:C/I:C/A:C"}}, {"lastseen": "2023-12-02T20:18:18", "description": "CVE-2020-27779 affecting package grub2 2.06~rc1-10. 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'content/dist/rhel8/8/x86_64/sap/os',\n 'content/dist/rhel8/8/x86_64/sap/source/SRPMS',\n 'content/dist/rhel8/8/x86_64/supplementary/debug',\n 'content/dist/rhel8/8/x86_64/supplementary/os',\n 'content/dist/rhel8/8/x86_64/supplementary/source/SRPMS'\n ],\n 'pkgs': [\n {'reference':'fwupd-1.5.9-1.el8_4', 'release':'8', 'rpm_spec_vers_cmp':TRUE}\n ]\n }\n];\n\nvar applicable_repo_urls = rhel_determine_applicable_repository_urls(constraints:constraints);\nif(applicable_repo_urls == RHEL_REPOS_NO_OVERLAP_MESSAGE) exit(0, RHEL_REPO_NOT_ENABLED);\n\nvar flag = 0;\nforeach var constraint_array ( constraints ) {\n var repo_relative_urls = NULL;\n if (!empty_or_null(constraint_array['repo_relative_urls'])) repo_relative_urls = constraint_array['repo_relative_urls'];\n var enterprise_linux_flag = rhel_repo_urls_has_content_dist_rhel(repo_urls:repo_relative_urls);\n foreach var pkg ( constraint_array['pkgs'] ) {\n var reference = NULL;\n var _release = NULL;\n var sp = NULL;\n var _cpu = NULL;\n 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rpm_check(release:_release, sp:sp, cpu:_cpu, reference:reference, epoch:epoch, el_string:el_string, rpm_spec_vers_cmp:rpm_spec_vers_cmp, allowmaj:allowmaj)) flag++;\n }\n}\n\nif (flag)\n{\n var extra = NULL;\n if (empty_or_null(applicable_repo_urls)) extra = rpm_report_get() + redhat_report_repo_caveat();\n else extra = rpm_report_get() + redhat_report_package_caveat();\n security_report_v4(\n port : 0,\n severity : SECURITY_HOLE,\n extra : extra\n );\n exit(0);\n}\nelse\n{\n var tested = pkg_tests_get();\n if (tested) audit(AUDIT_PACKAGE_NOT_AFFECTED, tested);\n else audit(AUDIT_PACKAGE_NOT_INSTALLED, 'fwupd');\n}\n", "cvss": {"score": 0.0, "vector": "NONE"}}, {"lastseen": "2023-05-18T15:26:11", "description": "The remote Scientific Linux 7 host has packages installed that are affected by multiple vulnerabilities as referenced in the SLSA-2021:0699-1 advisory.\n\n - grub2: acpi command allows privileged user to load crafted ACPI tables when Secure Boot is enabled (CVE-2020-14372)\n\n 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CVE-2020-27779
