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Red Hat: CVE-2020-14309: CVE-2020-14309 grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow (Multiple Advisories)

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Red Hat: CVE-2020-14309: CVE-2020-14309 grub2: Integer overflow in grub_squash_read_symlink may lead to heap-based buffer overflow (Multiple Advisories)

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
07/29/2020
Created
07/31/2020
Added
07/30/2020
Modified
12/15/2023

Description

There's an issue with grub2 in all versions before 2.06 when handling squashfs filesystems containing a symbolic link with name length of UINT32 bytes in size. The name size leads to an arithmetic overflow leading to a zero-size allocation further causing a heap-based buffer overflow with attacker controlled data.

Solution(s)

  • redhat-upgrade-fwupd
  • redhat-upgrade-fwupd-debuginfo
  • redhat-upgrade-fwupd-debugsource
  • redhat-upgrade-fwupdate
  • redhat-upgrade-fwupdate-debuginfo
  • redhat-upgrade-fwupdate-devel
  • redhat-upgrade-fwupdate-efi
  • redhat-upgrade-fwupdate-libs
  • redhat-upgrade-grub2
  • redhat-upgrade-grub2-common
  • redhat-upgrade-grub2-debuginfo
  • redhat-upgrade-grub2-debugsource
  • redhat-upgrade-grub2-efi-aa64-modules
  • redhat-upgrade-grub2-efi-ia32
  • redhat-upgrade-grub2-efi-ia32-cdboot
  • redhat-upgrade-grub2-efi-ia32-modules
  • redhat-upgrade-grub2-efi-x64
  • redhat-upgrade-grub2-efi-x64-cdboot
  • redhat-upgrade-grub2-efi-x64-modules
  • redhat-upgrade-grub2-pc
  • redhat-upgrade-grub2-pc-modules
  • redhat-upgrade-grub2-ppc-modules
  • redhat-upgrade-grub2-ppc64-modules
  • redhat-upgrade-grub2-ppc64le-modules
  • redhat-upgrade-grub2-tools
  • redhat-upgrade-grub2-tools-debuginfo
  • redhat-upgrade-grub2-tools-efi
  • redhat-upgrade-grub2-tools-efi-debuginfo
  • redhat-upgrade-grub2-tools-extra
  • redhat-upgrade-grub2-tools-extra-debuginfo
  • redhat-upgrade-grub2-tools-minimal
  • redhat-upgrade-grub2-tools-minimal-debuginfo
  • redhat-upgrade-mokutil
  • redhat-upgrade-mokutil-debuginfo
  • redhat-upgrade-shim-ia32
  • redhat-upgrade-shim-unsigned-aa64-debuginfo
  • redhat-upgrade-shim-unsigned-ia32
  • redhat-upgrade-shim-unsigned-ia32-debuginfo
  • redhat-upgrade-shim-unsigned-x64
  • redhat-upgrade-shim-unsigned-x64-debuginfo
  • redhat-upgrade-shim-x64

References

  • CVE-2020-14309
  • RHSA-2020:3216
  • RHSA-2020:3217
  • RHSA-2020:3223
  • RHSA-2020:3271
  • RHSA-2020:3274

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