Fiche vulnérabilité
CVE-2021-3697 : faille élevée grub2 (CVSS 7.0)
Description
A crafted JPEG image may lead the JPEG reader to underflow its data pointer, allowing user-controlled data to be written in heap. To a successful to be performed the attacker needs to perform some triage over the heap layout and craft an image with a malicious format and payload. This vulnerability can lead to data corruption and eventual code execution or secure boot circumvention. This flaw affects grub2 versions prior grub-2.12.
En bref
- Sévérité
- Élevée (CVSS 7.0)
- Vecteur CVSS
- CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
- Exploitation active
- Non signalée par la CISA
- Publication
- 6 juil. 2022
- Dernière mise à jour
- 3 août 2024
Produits concernés
- grub2