CVE-2020-14311

NameCVE-2020-14311
DescriptionThere 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.
SourceCVE (at NVD; CERT, LWN, oss-sec, fulldisc, Red Hat, Ubuntu, Gentoo, SUSE bugzilla/CVE, GitHub advisories/code/issues, web search, more)
ReferencesDSA-4735-1

Vulnerable and fixed packages

The table below lists information on source packages.

Source PackageReleaseVersionStatus
grub2 (PTS)bullseye (security), bullseye2.06-3~deb11u6fixed
bookworm, bookworm (security)2.06-13+deb12u1fixed
sid, trixie2.12-5fixed

The information below is based on the following data on fixed versions.

PackageTypeReleaseFixed VersionUrgencyOriginDebian Bugs
grub2sourcebuster2.02+dfsg1-20+deb10u1DSA-4735-1
grub2source(unstable)2.04-9

Notes

[stretch] - grub2 <ignored> (No SecureBoot support in stretch)
https://www.openwall.com/lists/oss-security/2020/07/29/3
https://git.savannah.gnu.org/gitweb/?p=grub.git;a=commit;h=3f05d693d1274965ffbe4ba99080dc2c570944c6

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