CVE-2020-15707

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.

• CWE-362
• CWE-190
• CWE-362

• http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.htmlMailing List, Third Party Advisory
• http://ubuntu.com/security/notices/USN-4432-1Third Party Advisory
• http://www.openwall.com/lists/oss-security/2020/07/29/3Mailing List, Third Party Advisory
• https://access.redhat.com/security/vulnerabilities/grub2bootloaderThird Party Advisory
• https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.htmlIssue Tracking, Vendor Advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011Patch, Third Party Advisory, Vendor Advisory
• https://security.gentoo.org/glsa/202104-05Third Party Advisory
• https://security.netapp.com/advisory/ntap-20200731-0008/Third Party Advisory
• https://usn.ubuntu.com/4432-1/Third Party Advisory
• https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypassThird Party Advisory
• https://www.debian.org/security/2020-GRUB-UEFI-SecureBootThird Party Advisory
• https://www.debian.org/security/2020/dsa-4735Third Party Advisory
• https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/Exploit, Third Party Advisory
• https://www.openwall.com/lists/oss-security/2020/07/29/3Mailing List, Third Party Advisory
• https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/Third Party Advisory
• https://www.suse.com/support/kb/doc/?id=000019673Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.htmlMailing List, Third Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.htmlMailing List, Third Party Advisory
• http://ubuntu.com/security/notices/USN-4432-1Third Party Advisory
• http://www.openwall.com/lists/oss-security/2020/07/29/3Mailing List, Third Party Advisory
• https://access.redhat.com/security/vulnerabilities/grub2bootloaderThird Party Advisory
• https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.htmlIssue Tracking, Vendor Advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011Patch, Third Party Advisory, Vendor Advisory
• https://security.gentoo.org/glsa/202104-05Third Party Advisory
• https://security.netapp.com/advisory/ntap-20200731-0008/Third Party Advisory
• https://usn.ubuntu.com/4432-1/Third Party Advisory
• https://wiki.ubuntu.com/SecurityTeam/KnowledgeBase/GRUB2SecureBootBypassThird Party Advisory
• https://www.debian.org/security/2020-GRUB-UEFI-SecureBootThird Party Advisory
• https://www.debian.org/security/2020/dsa-4735Third Party Advisory
• https://www.eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/Exploit, Third Party Advisory
• https://www.openwall.com/lists/oss-security/2020/07/29/3Mailing List, Third Party Advisory
• https://www.suse.com/c/suse-addresses-grub2-secure-boot-issue/Third Party Advisory
• https://www.suse.com/support/kb/doc/?id=000019673Third Party Advisory

Published

Jul 29, 2020

Last Modified

Jun 17, 2026

Status

Modified