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Ubuntu: (Multiple Advisories) (CVE-2020-14309): GRUB 2 vulnerabilities

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Ubuntu: (Multiple Advisories) (CVE-2020-14309): GRUB 2 vulnerabilities

Severity
5
CVSS
(AV:L/AC:L/Au:N/C:P/I:P/A:P)
Published
07/29/2020
Created
08/07/2020
Added
08/05/2020
Modified
03/22/2023

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)

  • ubuntu-upgrade-grub-efi-amd64-bin
  • ubuntu-upgrade-grub-efi-amd64-signed
  • ubuntu-upgrade-grub-efi-arm-bin
  • ubuntu-upgrade-grub-efi-arm64-bin
  • ubuntu-upgrade-grub-efi-arm64-signed
  • ubuntu-upgrade-grub-efi-ia32-bin

References

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