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      "text": "Moderate"
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      "text": "Copyright © Red Hat, Inc. All rights reserved.",
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        "category": "summary",
        "text": "Updated grub2 packages that fix one security issue and one bug are now\navailable for Red Hat Enterprise Linux 7.\n\nRed Hat Product Security has rated this update as having Moderate security\nimpact. A Common Vulnerability Scoring System (CVSS) base score, which\ngives a detailed severity rating, is available from the CVE link in the\nReferences section.\n\n[Updated 27 January 2016]\nThis advisory has been updated to document additional steps that need to be\nperformed on BIOS-based systems after installing this update. No changes\nwere made to the packages included in the advisory.",
        "title": "Topic"
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        "text": "The grub2 packages provide version 2 of the Grand Unified Bootloader\n(GRUB), a highly configurable and customizable bootloader with modular\narchitecture. The packages support a variety of kernel formats, file\nsystems, computer architectures, and hardware devices.\n\nA flaw was found in the way the grub2 handled backspace characters entered\nin username and password prompts. An attacker with access to the system\nconsole could use this flaw to bypass grub2 password protection and gain\nadministrative access to the system. (CVE-2015-8370)\n\nThis update also fixes the following bug:\n\n* When upgrading from Red Hat Enterprise Linux 7.1 and earlier, a\nconfigured boot password was not correctly migrated to the newly introduced\nuser.cfg configuration files. This could possibly prevent system\nadministrators from changing grub2 configuration during system boot even if\nthey provided the correct password. This update corrects the password\nmigration script and the incorrectly generated user.cfg file. (BZ#1290089)\n\nAll grub2 users are advised to upgrade to these updated packages, which\ncontain backported patches to correct these issues. For this update to take\neffect on BIOS-based machines, grub2 needs to be reinstalled as documented\nin the \"Reinstalling GRUB 2 on BIOS-Based Machines\" section of the Red Hat\nEnterprise Linux 7 System Administrator's Guide linked to in the References\nsection. No manual action is needed on UEFI-based machines.",
        "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"
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        "summary": "https://access.redhat.com/documentation/en-US/Red_Hat_Enterprise_Linux/7/html/System_Administrators_Guide/sec-Reinstalling_GRUB_2.html#sec-grub2-reinstall_on_BIOS-Based_Machines",
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        "url": "https://security.access.redhat.com/data/csaf/v2/advisories/2015/rhsa-2015_2623.json"
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    "title": "Red Hat Security Advisory: grub2 security and bug fix update",
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            "7Workstation-7.2.Z:grub2-1:2.02-0.33.el7_2.src",
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            "7Workstation-optional-7.2.Z:grub2-efi-modules-1:2.02-0.33.el7_2.x86_64"
          ]
        }
      ],
      "threats": [
        {
          "category": "impact",
          "details": "Moderate"
        }
      ],
      "title": "grub2: buffer overflow when checking password entered during bootup"
    }
  ]
}