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CVE-2020-10713

8.2 · HIGH

A flaw was found in grub2, prior to version 2.06.

Published Jul 30, 2020CWE-120EPSS 1.71%

Overview

CVE-2020-10713 is a high-severity vulnerability. It was published on July 30, 2020 and has a CVSS 3.1 base score of 8.2 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

A flaw was found in grub2, prior to version 2.06. An attacker may use the GRUB 2 flaw to hijack and tamper the GRUB verification process. This flaw also allows the bypass of Secure Boot protections. In order to load an untrusted or modified kernel, an attacker would first need to establish access to the system such as gaining physical access, obtain the ability to alter a pxe-boot network, or have remote access to a networked system with root access. With this access, an attacker could then craft a string to cause a buffer overflow by injecting a malicious payload that leads to arbitrary code execution within GRUB. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

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.htmlRefwww.openwall.com/lists/oss-security/2020/07/29/3Refbugzilla.redhat.com/show_bug.cgi?id=1825243Refcve.openeuler.org/#/CVEInfo/CVE-2020-10713Refeclypsium.com/2020/07/29/theres-a-hole-in-the-boot/Refkb.vmware.com/s/article/80181Refsecurity.gentoo.org/glsa/202104-05Refsecurity.netapp.com/advisory/ntap-20200731-0008/Reftools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-grub2-code-exec-xLePCAPY

How CyberStrike helps

Frequently asked questions

What is CVE-2020-10713?

CVE-2020-10713 is a high-severity vulnerability. It was published on July 30, 2020 and has a CVSS 3.1 base score of 8.2 (HIGH).

How severe is CVE-2020-10713?

This vulnerability has a CVSS 3.1 base score of 8.2, rated HIGH. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2020-10713?

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-2020-10713?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2020-10713 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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