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Debian: CVE-2020-14310: grub2 -- security update

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Debian: CVE-2020-14310: grub2 -- security update

Severity
4
CVSS
(AV:L/AC:L/Au:N/C:N/I:P/A:P)
Published
07/31/2020
Created
08/01/2020
Added
07/31/2020
Modified
08/06/2020

Description

There is an issue on grub2 before version 2.06 at function read_section_as_string(). It expects a font name to be at max UINT32_MAX - 1 length in bytes but it doesn't verify it before proceed with buffer allocation to read the value from the font value. An attacker may leverage that by crafting a malicious font file which has a name with UINT32_MAX, leading to read_section_as_string() to an arithmetic overflow, zero-sized allocation and further heap-based buffer overflow.

Solution(s)

  • debian-upgrade-grub2

References

  • debian-upgrade-grub2

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