CVE-2020-14311

grub2: Integer overflow in grub_ext2_read_link leads to heap-based buffer overflow

Published Jul 31, 2020 CVSS 3.1 · 5.7 Medium EPSS < 1% KEV · Not listed
Description
There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

Source ID Title
Debian DSA Debian DSA DSA-4735-1 grub2 security update
EUVD EUVD EUVD-2020-6463 There is an issue with grub2 before version 2.06 while handling symlink on ext filesystems. A filesystem containing a symbolic link with an inode size of UINT32_MAX causes an arithmetic overflow leading to a zero-sized memory allocation with subsequent heap-based buffer overflow.
Ubuntu USN Ubuntu USN USN-4432-1 GRUB 2 vulnerabilities
History

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