CVE-2020-10713 Information

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.

CVSS Vector

CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Reference

http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00016.html http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00017.html http://www.openwall.com/lists/oss-security/2020/07/29/3 https://bugzilla.redhat.com/show_bug.cgi?id=1825243 https://cve.openeuler.org//CVEInfo/CVE-2020-10713 https://eclypsium.com/2020/07/29/theres-a-hole-in-the-boot/ https://kb.vmware.com/s/article/80181 https://security.netapp.com/advisory/ntap-20200731-0008/ https://tools.cisco.com/security/center/content/CiscoSecurityAdvisory/cisco-sa-grub2-code-exec-xLePCAPY https://usn.ubuntu.com/4432-1/ https://www.debian.org/security/2020/dsa-4735 https://www.kb.cert.org/vuls/id/174059

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction Required

HIGH

Scope

NONE

Confidentiality Impact

CHANGED

Integrity Impact

HIGH

Availability Impact

HIGH

Base Score

HIGH

Base Severity

8.2