Vigil@nce - GRUB2: integer overflow via grub_ext2_read_link
August 2020 by Vigil@nce
This bulletin was written by Vigil@nce : https://vigilance.fr/offer/Computer-vulnerabilities-watch-and-alert
SYNTHESIS OF THE VULNERABILITY
Impacted products: Debian, Windows 10, Windows 2012, Windows 2016,
Windows 2019, Windows 8, Windows RT, openSUSE Leap, RHEL, SUSE
Linux Enterprise Desktop, SLES, Ubuntu, Unix (platform) not
comprehensive.
Severity: 1/4.
Consequences: administrator access/rights, denial of service on
server.
Provenance: physical access.
Confidence: confirmed by the editor (5/5).
Creation date: 30/07/2020.
DESCRIPTION OF THE VULNERABILITY
An attacker can trigger an integer overflow via
grub_ext2_read_link() of GRUB2, in order to trigger a denial of
service, and possibly to run code.
ACCESS TO THE FULL VIGIL@NCE BULLETIN
https://vigilance.fr/vulnerability/GRUB2-integer-overflow-via-grub-ext2-read-link-32955