{ "document": { "aggregate_severity": { "namespace": "https://access.redhat.com/security/updates/classification/", "text": "Moderate" }, "category": "csaf_security_advisory", "csaf_version": "2.0", "distribution": { "text": "Copyright © Red Hat, Inc. All rights reserved.", "tlp": { "label": "WHITE", "url": "https://www.first.org/tlp/" } }, "lang": "en", "notes": [ { "category": "summary", "text": "An update for grub2 is now available for Red Hat Enterprise Linux 8.\n\nRed Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which gives a detailed severity rating, is available for each vulnerability from the CVE link(s) in the References section.", "title": "Topic" }, { "category": "general", "text": "The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices.\n\nSecurity Fix(es):\n\n* grub2: grub2-set-bootflag utility causes grubenv corruption rendering the system non-bootable (CVE-2019-14865)\n\nFor more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.", "title": "Details" }, { "category": "legal_disclaimer", "text": "This content is licensed under the Creative Commons Attribution 4.0 International License (https://creativecommons.org/licenses/by/4.0/). If you distribute this content, or a modified version of it, you must provide attribution to Red Hat Inc. and provide a link to the original.", "title": "Terms of Use" } ], "publisher": { "category": "vendor", "contact_details": "https://access.redhat.com/security/team/contact/", "issuing_authority": "Red Hat Product Security is responsible for vulnerability handling across all Red Hat products and services.", "name": "Red Hat Product Security", "namespace": "https://www.redhat.com" }, "references": [ { "category": "self", "summary": "https://access.redhat.com/errata/RHSA-2020:0335", "url": "https://access.redhat.com/errata/RHSA-2020:0335" }, { "category": "external", "summary": "https://access.redhat.com/security/updates/classification/#moderate", "url": "https://access.redhat.com/security/updates/classification/#moderate" }, { "category": "external", "summary": "1764925", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=1764925" }, { "category": "self", "summary": "Canonical URL", "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2020/rhsa-2020_0335.json" } ], "title": "Red Hat Security Advisory: grub2 security update", "tracking": { "current_release_date": "2025-11-21T18:12:06+00:00", "generator": { "date": "2025-11-21T18:12:06+00:00", "engine": { "name": "Red Hat SDEngine", "version": "4.6.12" } }, "id": "RHSA-2020:0335", "initial_release_date": "2020-02-04T13:14:27+00:00", "revision_history": [ { "date": "2020-02-04T13:14:27+00:00", "number": "1", "summary": "Initial version" }, { "date": "2020-02-04T13:14:27+00:00", "number": "2", "summary": "Last updated version" }, { "date": "2025-11-21T18:12:06+00:00", "number": "3", "summary": "Last generated version" } ], "status": "final", "version": "3" } }, "product_tree": { "branches": [ { "branches": [ { "branches": [ { "category": "product_name", "name": "Red Hat Enterprise Linux BaseOS (v. 8)", "product": { "name": "Red Hat Enterprise Linux BaseOS (v. 8)", "product_id": "BaseOS-8.1.0.Z.MAIN.EUS", 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A local attacker could run this utility under resource pressure (for example by setting RLIMIT), causing grub2 configuration files to be truncated and leaving the system unbootable on subsequent reboots.", "title": "Vulnerability description" }, { "category": "summary", "text": "grub2: grub2-set-bootflag utility causes grubenv corruption rendering the system non-bootable", "title": "Vulnerability summary" }, { "category": "other", "text": "grub-set-bootflag is a command line to set bootflags in GRUB's stored environment. This is a downstream utility which is shipped with Red Hat Enterprise Linux 8 and Fedora. A flaw was found in this application which would could allow a local attacker (someone having a local account on the system) to cause grub configuration files to be truncated. Whenever the machine was rebooted, grub would fail to read the configuration files and the system would be rendered unbootable.", "title": "Statement" }, { "category": "general", "text": "The CVSS score(s) listed for this vulnerability do not reflect the associated product's status, and are included for informational purposes to better understand the severity of this vulnerability.", "title": "CVSS score applicability" } ], "product_status": { "fixed": [ "BaseOS-8.1.0.Z.MAIN.EUS:grub2-1:2.02-78.el8_1.1.src", "BaseOS-8.1.0.Z.MAIN.EUS:grub2-common-1:2.02-78.el8_1.1.noarch", "BaseOS-8.1.0.Z.MAIN.EUS:grub2-debuginfo-1:2.02-78.el8_1.1.aarch64", "BaseOS-8.1.0.Z.MAIN.EUS:grub2-debuginfo-1:2.02-78.el8_1.1.ppc64le", "BaseOS-8.1.0.Z.MAIN.EUS:grub2-debuginfo-1:2.02-78.el8_1.1.x86_64", "BaseOS-8.1.0.Z.MAIN.EUS:grub2-debugsource-1:2.02-78.el8_1.1.aarch64", "BaseOS-8.1.0.Z.MAIN.EUS:grub2-debugsource-1:2.02-78.el8_1.1.ppc64le", "BaseOS-8.1.0.Z.MAIN.EUS:grub2-debugsource-1:2.02-78.el8_1.1.x86_64", 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