VULNERABILITY

Alpine Linux: CVE-2021-3418: Improper Preservation of Permissions

Try Surface Command Get a continuous 360° view of your attack surface
Back to Search

Alpine Linux: CVE-2021-3418: Improper Preservation of Permissions

Severity
6
CVSS
(AV:L/AC:M/Au:M/C:C/I:C/A:C)
Published
03/15/2021
Created
08/23/2024
Added
08/22/2024
Modified
01/28/2025

Description

If certificates that signed grub are installed into db, grub can be booted directly. It will then boot any kernel without signature validation. The booted kernel will think it was booted in secureboot mode and will implement lockdown, yet it could have been tampered. This flaw is a reintroduction of CVE-2020-15705 and only affects grub2 versions prior to 2.06 and upstream and distributions using the shim_lock mechanism.

Solution(s)

  • alpine-linux-upgrade-grub

References

insightVM

Advanced vulnerability management analytics and reporting.
Key Features
  • Lightweight Endpoint Agent
  • Live Dashboards
  • Real Risk Prioritization
  • IT-Integrated Remediation Projects
  • Cloud, Virtual, and Container Assessment
  • Integrated Threat Feeds
  • Easy-to-Use RESTful API
  • Automation-Assisted Patching
  • Automated Containment
Free InsightVM Trial View All Features

With Rapid7 live dashboards, I have a clear view of all the assets on my network, which ones can be exploited, and what I need to do in order to reduce the risk in my environment in real-time. No other tool gives us that kind of value and insight.

– Scott Cheney, Manager of Information Security, Sierra View Medical Center

;