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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...

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/...




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