CVE-2020-15707

Vulnerability 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.

CVSS Score

Affected Products

Related Weaknesses (CWE)

References

• http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.htmlMailing ListThird Party Advisory
• http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.htmlMailing ListThird Party Advisory
• http://ubuntu.com/security/notices/USN-4432-1Third Party Advisory
• http://www.openwall.com/lists/oss-security/2020/07/29/3Mailing ListThird Party Advisory
• https://access.redhat.com/security/vulnerabilities/grub2bootloaderThird Party Advisory
• https://lists.gnu.org/archive/html/grub-devel/2020-07/msg00034.htmlIssue TrackingVendor Advisory
• https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011PatchThird Party AdvisoryVendor 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/ExploitThird Party Advisory
• https://www.openwall.com/lists/oss-security/2020/07/29/3Mailing ListThird Party Advisory