<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE glsa SYSTEM "http://www.gentoo.org/dtd/glsa.dtd">
<glsa id="202209-12">
    <title>GRUB: Multiple Vulnerabilities</title>
    <synopsis>Multiple vulnerabilities have been discovered in GRUB, the worst of which may allow for secureboot bypass.</synopsis>
    <product type="ebuild">grub</product>
    <announced>2022-09-25</announced>
    <revised count="1">2022-09-25</revised>
    <bug>850535</bug>
    <bug>835082</bug>
    <access>local</access>
    <affected>
        <package name="sys-boot/grub" auto="yes" arch="*">
            <unaffected range="ge">2.06</unaffected>
            <vulnerable range="lt">2.06</vulnerable>
        </package>
    </affected>
    <background>
        <p>GNU GRUB is a multiboot boot loader used by most Linux systems.</p>
    </background>
    <description>
        <p>Multiple vulnerabilities have been discovered in GRUB. Please review the CVE identifiers referenced below for details.</p>
    </description>
    <impact type="high">
        <p>Please review the referenced CVE identifiers for details.</p>
    </impact>
    <workaround>
        <p>There is no known workaround at this time.</p>
    </workaround>
    <resolution>
        <p>All GRUB users should upgrade to the latest version:</p>
        
        <code>
          # emerge --sync
          # emerge --ask --oneshot --verbose ">=sys-boot/grub-2.06-r3"
        </code>
        
        <p>After upgrading, make sure to run the grub-install command with options appropriate for your system. See the GRUB2 Gentoo Wiki page for directions. Your system will be vulnerable until this action is performed.</p>
    </resolution>
    <references>
        <uri link="https://nvd.nist.gov/vuln/detail/CVE-2021-3695">CVE-2021-3695</uri>
        <uri link="https://nvd.nist.gov/vuln/detail/CVE-2021-3696">CVE-2021-3696</uri>
        <uri link="https://nvd.nist.gov/vuln/detail/CVE-2021-3697">CVE-2021-3697</uri>
        <uri link="https://nvd.nist.gov/vuln/detail/CVE-2021-3981">CVE-2021-3981</uri>
        <uri link="https://nvd.nist.gov/vuln/detail/CVE-2022-28733">CVE-2022-28733</uri>
        <uri link="https://nvd.nist.gov/vuln/detail/CVE-2022-28734">CVE-2022-28734</uri>
        <uri link="https://nvd.nist.gov/vuln/detail/CVE-2022-28735">CVE-2022-28735</uri>
        <uri link="https://nvd.nist.gov/vuln/detail/CVE-2022-28736">CVE-2022-28736</uri>
        <uri link="https://nvd.nist.gov/vuln/detail/CVE-2022-28737">CVE-2022-28737</uri>
    </references>
    <metadata tag="requester" timestamp="2022-09-25T13:35:30.406656Z">ajak</metadata>
    <metadata tag="submitter" timestamp="2022-09-25T13:35:30.411250Z">ajak</metadata>
</glsa>