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CVE-2020-15707

5.7 · MEDIUM

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 inclu…

Published Jul 29, 2020CWE-362EPSS 1.59%

Overview

CVE-2020-15707 is a medium-severity vulnerability. It was published on July 29, 2020 and has a CVSS 3.1 base score of 5.7 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Reflists.opensuse.org/opensuse-security-announce/2020-08/msg00016.htmlReflists.opensuse.org/opensuse-security-announce/2020-08/msg00017.htmlRefubuntu.com/security/notices/USN-4432-1Refwww.openwall.com/lists/oss-security/2020/07/29/3Refaccess.redhat.com/security/vulnerabilities/grub2bootloaderReflists.gnu.org/archive/html/grub-devel/2020-07/msg00034.htmlRefportal.msrc.microsoft.com/en-US/security-guidance/advisory/ADV200011Refsecurity.gentoo.org/glsa/202104-05Refsecurity.netapp.com/advisory/ntap-20200731-0008/Refusn.ubuntu.com/4432-1/

How CyberStrike helps

Frequently asked questions

What is CVE-2020-15707?

CVE-2020-15707 is a medium-severity vulnerability. It was published on July 29, 2020 and has a CVSS 3.1 base score of 5.7 (MEDIUM).

How severe is CVE-2020-15707?

This vulnerability has a CVSS 3.1 base score of 5.7, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-15707?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2020-15707?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-15707 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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