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Debian: CVE-2020-14309: grub2 -- security update

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Debian: CVE-2020-14309: grub2 -- security update

Severity
4
CVSS
(AV:L/AC:M/Au:N/C:P/I:P/A:P)
Published
07/31/2020
Created
08/01/2020
Added
07/31/2020
Modified
08/04/2020

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)

  • debian-upgrade-grub2

References

  • debian-upgrade-grub2

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