CVE-2020-15707

 

Published at: - 29-07-2020 08:15

Last modified: - 22-11-2022 05:52

Total changes: - 5

Description

Integer overflows were discovered in the functions grub_cmd_initrd and grub_initrd_init in the efilinux component of GRUB2, as shipped in Debian, Red Hat, and Ubuntu (the functionality is not included in GRUB2 upstream), leading to a heap-based buffer overflow. These could be triggered by an extremely large number of arguments to the initrd command on 32-bit architectures, or a crafted filesystem with very large files on any architecture. An attacker could use this to execute arbitrary code and bypass UEFI Secure Boot restrictions. This issue affects GRUB2 version 2.04 and prior versions.

Common Vulnerability Scoring System (CVSS)

CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H

 

Verification logic

 

Reference

• https://www.suse.com/support/kb/doc/?id=000019673
• http://ubuntu.com/security/notices/USN-4432-1
• https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html
• https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass
• https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011
• https://access.redhat.com/security/vulnerabilities/grub2bootloader
• https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/
• https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/
• https://www.openwall.com/lists/oss-security/2020/07/29/3
• DSA-4735-Third Party Advisory
• [oss-security] 20200729 multiple secure boot grub2 and linux kernel vulnerabilities-Mailing List, Third Party Advisory
• https://security.netapp.com/advisory/ntap-20200731-0008/
• USN-4432-1-Third Party Advisory
• openSUSE-SU-2020:1169-Mailing List, Third Party Advisory
• openSUSE-SU-2020:1168-Mailing List, Third Party Advisory
• GLSA-202104-05-Third Party Advisory

 

Keywords

NVD

 

CVE-2020-15707

 

CVE

 

Common vulnerabilities & exposures

 

CVSS

 

Common vulnerability scoring system

 

Security

 

Vulnerabilities

 

Exposures