CVE-2020-15707 (GCVE-0-2020-15707)
Vulnerability from cvelistv5
Published
2020-07-29 17:45
Modified
2024-09-17 03:07
Severity ?
5.7 (Medium) - CVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:N/I:H/A:H
CWE
  • CWE-362 - Race Condition (Concurrent Execution using Shared Resource with Improper Synchronization)
Summary
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.
References
https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/ x_refsource_CONFIRM
https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypass vendor-advisory, x_refsource_UBUNTU
http://ubuntu.com/security/notices/USN-4432-1 vendor-advisory, x_refsource_UBUNTU
https://www.debian.org/security/2020-GRUB-UEFI-SecureBoot vendor-advisory, x_refsource_DEBIAN
https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011 x_refsource_CONFIRM
https://access.redhat.com/security/vulnerabilities/grub2bootloader vendor-advisory, x_refsource_REDHAT
https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/ vendor-advisory, x_refsource_SUSE
https://www.suse.com/support/kb/doc/?id=000019673 vendor-advisory, x_refsource_SUSE
https://www.openwall.com/lists/oss-security/2020/07/29/3 x_refsource_CONFIRM
https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.html x_refsource_CONFIRM
https://www.debian.org/security/2020/dsa-4735 vendor-advisory, x_refsource_DEBIAN
http://www.openwall.com/lists/oss-security/2020/07/29/3 mailing-list, x_refsource_MLIST
https://security.netapp.com/advisory/ntap-20200731-0008/ x_refsource_CONFIRM
https://usn.ubuntu.com/4432-1/ vendor-advisory, x_refsource_UBUNTU
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html vendor-advisory, x_refsource_SUSE
http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html vendor-advisory, x_refsource_SUSE
https://security.gentoo.org/glsa/202104-05 vendor-advisory, x_refsource_GENTOO
Impacted products
Vendor Product Version
Ubuntu grub2 in Ubuntu Version: 20.04 LTS   < 2.04-1ubuntu26.1
Version: 18.04 LTS   < 2.02-2ubuntu8.16
Version: 16.04 LTS   < 2.02~beta2-36ubuntu3.26
Version: 14.04 ESM   < 2.02~beta2-9ubuntu1.20
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