VulnerabilityModified

CVE-2020-15707

MEDIUM 6.4EPSS 1.59%

Does this matter?

Lower severity and a low EPSS score (1.59%). Track it; it rarely justifies an emergency change on its own.

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 3.1: 6.4 MEDIUMCVSS:3.1/AV:L/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
EPSS: 1.59% probability · 74th percentile
CISA KEV: Not listed
Weakness: CWE-362, CWE-190
Affected: gnu/grub2 · redhat/enterprise linux atomic host · redhat/openshift container platform · redhat/enterprise linux · microsoft/windows 10 · microsoft/windows 8.1 · microsoft/windows rt 8.1 · microsoft/windows server 2012 · microsoft/windows server 2016 · microsoft/windows server 2019 · canonical/ubuntu linux · debian/debian linux · opensuse/leap · suse/suse linux enterprise server · netapp/active iq unified manager
Source: security@ubuntu.com

References

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.