Linux Security
    Linux Security
    Linux Security

    RedHat: RHSA-2020-3227:01 Moderate: grub2 security update

    Date
    144
    Posted By
    An update for grub2, shim, and fwupd is now available for Red Hat Enterprise Linux 8.0 Update Services for SAP Solutions. Red Hat Product Security has rated this update as having a security impact of Moderate. A Common Vulnerability Scoring System (CVSS) base score, which
    -----BEGIN PGP SIGNED MESSAGE-----
    Hash: SHA256
    
    =====================================================================
                       Red Hat Security Advisory
    
    Synopsis:          Moderate: grub2 security update
    Advisory ID:       RHSA-2020:3227-01
    Product:           Red Hat Enterprise Linux
    Advisory URL:      https://access.redhat.com/errata/RHSA-2020:3227
    Issue date:        2020-07-29
    CVE Names:         CVE-2020-10713 CVE-2020-14308 CVE-2020-14309 
                       CVE-2020-14310 CVE-2020-14311 CVE-2020-15705 
                       CVE-2020-15706 CVE-2020-15707 
    =====================================================================
    
    1. Summary:
    
    An update for grub2, shim, and fwupd is now available for Red Hat
    Enterprise Linux 8.0 Update Services for SAP Solutions.
    
    Red 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.
    
    2. Relevant releases/architectures:
    
    Red Hat Enterprise Linux BaseOS E4S (v. 8.0) - noarch, ppc64le, x86_64
    
    3. Description:
    
    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.
    
    The shim package contains a first-stage UEFI boot loader that handles
    chaining to a trusted full boot loader under secure boot environments.
    
    The fwupd packages provide a service that allows session software to update
    device firmware.
    
    Security Fix(es):
    
    * grub2: Crafted grub.cfg file can lead to arbitrary code execution during
    boot process (CVE-2020-10713)
    
    * grub2: grub_malloc does not validate allocation size allowing for
    arithmetic overflow and subsequent heap-based buffer overflow
    (CVE-2020-14308)
    
    * grub2: Integer overflow in grub_squash_read_symlink may lead to
    heap-based buffer overflow (CVE-2020-14309)
    
    * grub2: Integer overflow read_section_as_string may lead to heap-based
    buffer overflow (CVE-2020-14310)
    
    * grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer
    overflow (CVE-2020-14311)
    
    * grub2: Fail kernel validation without shim protocol (CVE-2020-15705)
    
    * grub2: Use-after-free redefining a function whilst the same function is
    already executing (CVE-2020-15706)
    
    * grub2: Integer overflow in initrd size handling (CVE-2020-15707)
    
    For 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.
    
    4. Solution:
    
    For details on how to apply this update, which includes the changes
    described in this advisory, refer to:
    
    https://access.redhat.com/articles/11258
    
    5. Bugs fixed (https://bugzilla.redhat.com/):
    
    1825243 - CVE-2020-10713 grub2: Crafted grub.cfg file can lead to arbitrary code execution during boot process
    1852009 - CVE-2020-14308 grub2: grub_malloc does not validate allocation size allowing for arithmetic overflow and subsequent heap-based buffer overflow
    1852014 - CVE-2020-14311 grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow
    1852022 - CVE-2020-14309 grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow
    1852030 - CVE-2020-14310 grub2: Integer overflow read_section_as_string may lead to heap-based buffer overflow
    1860978 - CVE-2020-15705 grub2: Fail kernel validation without shim protocol
    1861118 - CVE-2020-15706 grub2: Use-after-free redefining a function whilst the same function is already executing
    1861581 - CVE-2020-15707 grub2: Integer overflow in initrd size handling
    
    6. Package List:
    
    Red Hat Enterprise Linux BaseOS E4S (v. 8.0):
    
    Source:
    fwupd-1.1.4-2.el8_0.src.rpm
    grub2-2.02-87.el8_0.src.rpm
    shim-15-14.el8_0.src.rpm
    
    noarch:
    grub2-common-2.02-87.el8_0.noarch.rpm
    grub2-efi-aa64-modules-2.02-87.el8_0.noarch.rpm
    grub2-efi-ia32-modules-2.02-87.el8_0.noarch.rpm
    grub2-efi-x64-modules-2.02-87.el8_0.noarch.rpm
    grub2-pc-modules-2.02-87.el8_0.noarch.rpm
    grub2-ppc64le-modules-2.02-87.el8_0.noarch.rpm
    
    ppc64le:
    fwupd-1.1.4-2.el8_0.ppc64le.rpm
    fwupd-debuginfo-1.1.4-2.el8_0.ppc64le.rpm
    fwupd-debugsource-1.1.4-2.el8_0.ppc64le.rpm
    grub2-debuginfo-2.02-87.el8_0.ppc64le.rpm
    grub2-debugsource-2.02-87.el8_0.ppc64le.rpm
    grub2-ppc64le-2.02-87.el8_0.ppc64le.rpm
    grub2-tools-2.02-87.el8_0.ppc64le.rpm
    grub2-tools-debuginfo-2.02-87.el8_0.ppc64le.rpm
    grub2-tools-extra-2.02-87.el8_0.ppc64le.rpm
    grub2-tools-extra-debuginfo-2.02-87.el8_0.ppc64le.rpm
    grub2-tools-minimal-2.02-87.el8_0.ppc64le.rpm
    grub2-tools-minimal-debuginfo-2.02-87.el8_0.ppc64le.rpm
    
    x86_64:
    fwupd-1.1.4-2.el8_0.x86_64.rpm
    fwupd-debuginfo-1.1.4-2.el8_0.x86_64.rpm
    fwupd-debugsource-1.1.4-2.el8_0.x86_64.rpm
    grub2-debuginfo-2.02-87.el8_0.x86_64.rpm
    grub2-debugsource-2.02-87.el8_0.x86_64.rpm
    grub2-efi-ia32-2.02-87.el8_0.x86_64.rpm
    grub2-efi-ia32-cdboot-2.02-87.el8_0.x86_64.rpm
    grub2-efi-x64-2.02-87.el8_0.x86_64.rpm
    grub2-efi-x64-cdboot-2.02-87.el8_0.x86_64.rpm
    grub2-pc-2.02-87.el8_0.x86_64.rpm
    grub2-tools-2.02-87.el8_0.x86_64.rpm
    grub2-tools-debuginfo-2.02-87.el8_0.x86_64.rpm
    grub2-tools-efi-2.02-87.el8_0.x86_64.rpm
    grub2-tools-efi-debuginfo-2.02-87.el8_0.x86_64.rpm
    grub2-tools-extra-2.02-87.el8_0.x86_64.rpm
    grub2-tools-extra-debuginfo-2.02-87.el8_0.x86_64.rpm
    grub2-tools-minimal-2.02-87.el8_0.x86_64.rpm
    grub2-tools-minimal-debuginfo-2.02-87.el8_0.x86_64.rpm
    shim-ia32-15-14.el8_0.x86_64.rpm
    shim-x64-15-14.el8_0.x86_64.rpm
    
    These packages are GPG signed by Red Hat for security.  Our key and
    details on how to verify the signature are available from
    https://access.redhat.com/security/team/key/
    
    7. References:
    
    https://access.redhat.com/security/cve/CVE-2020-10713
    https://access.redhat.com/security/cve/CVE-2020-14308
    https://access.redhat.com/security/cve/CVE-2020-14309
    https://access.redhat.com/security/cve/CVE-2020-14310
    https://access.redhat.com/security/cve/CVE-2020-14311
    https://access.redhat.com/security/cve/CVE-2020-15705
    https://access.redhat.com/security/cve/CVE-2020-15706
    https://access.redhat.com/security/cve/CVE-2020-15707
    https://access.redhat.com/security/updates/classification/#moderate
    https://access.redhat.com/security/vulnerabilities/grub2bootloader
    
    8. Contact:
    
    The Red Hat security contact is . More contact
    details at https://access.redhat.com/security/team/contact/
    
    Copyright 2020 Red Hat, Inc.
    -----BEGIN PGP SIGNATURE-----
    Version: GnuPG v1
    
    iQIVAwUBXyHZEtzjgjWX9erEAQi/iQ/6AnVamiVIedrN+1zdQiHGyuPUcNBgS3f+
    1QQ2pwLAwB4tFdZqQeH/ozP/7jiwpzjBH6gEaa6iwjSJVdFS1jtsbx84XzjnIJ6F
    jg7lJssJyE/zXIW0UZ1tcLiwt6AqMB6bl2djk1PzQj+VazumZ9JOacYrTQFwyrAB
    Z25a0Q0KbFhaKhfo/QB3OpG1Ek6V2yWYD0ScKohvI918iBvvz/zG4zoyClmzTxYO
    9nr8ZvRJQfzBop1qiDbedJSeLIfsJJyQcEmD25IBVeVKKNLF25gzBqAnq8OLMGDR
    2FxRvPzf9vzMxeOyo3Dr4ZHsG5ZnmTF/gS8QYO7SquMVmJJ1C+pNHyvxfT8VpFM7
    9O7KMQMIoCfUiVdeUS5Rt1bZlx5w2/Wk6LN6/TGBYLDIIz7zpllL+hAGVlI/GPK6
    uXVhJunpRqJ1sLg+KUaSHENFywqnwlslcR7bXWUG/oH/0C+I+4Edx9p0sKVLnf9F
    GVWwAmw1ZZG/Ab7SEGidLLBEllrBh/4VYTIktXJovmJ3cz+SYP19sM98+5ftJb/S
    8/DnJpGAxxDAe6QHxInCT25uIHKkZND0d06dzWvn/n5lSPBHJ+KPTR2sC1DlcuI7
    XIhcj+WBO/rSJBnl2IyuusKThyVD9D1oCvsGm0Y0ZCxP2JsErAmjgWO1AEvODSok
    Hjos6WFqcW8=
    =yC3d
    -----END PGP SIGNATURE-----
    
    --
    RHSA-announce mailing list
    This email address is being protected from spambots. You need JavaScript enabled to view it.
    https://www.redhat.com/mailman/listinfo/rhsa-announce
    

    LinuxSecurity Poll

    Which aspect of server security are you most interested in learning more about?

    No answer selected. Please try again.
    Please select either existing option or enter your own, however not both.
    Please select minimum 0 answer(s) and maximum 3 answer(s).
    /main-polls/38-which-aspect-of-server-security-are-you-most-interested-in-learning-more-about?task=poll.vote&format=json
    38
    radio
    [{"id":"131","title":"Preventing information leakage","votes":"1","type":"x","order":"1","pct":100,"resources":[]},{"id":"132","title":"Firewall considerations","votes":"0","type":"x","order":"2","pct":0,"resources":[]},{"id":"133","title":"Permissions ","votes":"0","type":"x","order":"3","pct":0,"resources":[]}] ["#ff5b00","#4ac0f2","#b80028","#eef66c","#60bb22","#b96a9a","#62c2cc"] ["rgba(255,91,0,0.7)","rgba(74,192,242,0.7)","rgba(184,0,40,0.7)","rgba(238,246,108,0.7)","rgba(96,187,34,0.7)","rgba(185,106,154,0.7)","rgba(98,194,204,0.7)"] 350


    VIEW MORE POLLS

    bottom 200

    Please enable / Bitte aktiviere JavaScript!
    Veuillez activer / Por favor activa el Javascript![ ? ]

    We use cookies to provide and improve our services. By using our site, you consent to our Cookie Policy.