CVE-2020-10713
grub2 - security update
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.
How to fix CVE-2020-10713
To remediate CVE-2020-10713, upgrade the affected package to a fixed version below.
- —upgrade to 2.06-r0 or later
- —upgrade to 2.04-9 or later
- —upgrade to 2.02+dfsg1-20+deb10u1 or later
Is CVE-2020-10713 being exploited?
Low — EPSS is 0.4%, meaning exploitation activity has not been observed at scale.
Affected packages (3)
- from 0, < 2.06-r0
- from 0, < 2.04-9
- from 0, < 2.02+dfsg1-20+deb10u1
CVSS scores
| Source | Version | Severity | Vector |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.2 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H |