SB20240910146 - Amazon Linux AMI update for grub2

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Main Vulnerability Database SB20240910146

SB20240910146 - Amazon Linux AMI update for grub2

Published: September 10, 2024

Security Bulletin ID SB20240910146
Severity
Low
Patch available
YES
Number of vulnerabilities 2
Exploitation vector Local access
Highest impact Denial of service

Breakdown by Severity

Low 100%
  • Low
  • Medium
  • High
  • Critical

Description

This security bulletin contains information about 2 secuirty vulnerabilities.


1) Resource management error (CVE-ID: CVE-2024-1048)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to an error in the grub2-set-bootflag utility of grub2. The grub2-set-bootflag will create a temporary file with the new grubenv content and rename it to the original grubenv file. If the program is killed before the rename operation, the temporary file will not be removed and may fill the filesystem when invoked multiple times, resulting in a filesystem out of free inodes or blocks.


2) Privilege Defined With Unsafe Actions (CVE-ID: CVE-2019-14865)

The vulnerability allows a local user to perform a denial of service (DoS) attack.

The vulnerability exists due to an error in the grub2-set-bootflag utility. A local user can run this utility under resource pressure (for example by setting RLIMIT), causing grub2 configuration files to be truncated and leaving the system unbootable on subsequent reboots.


Remediation

Install update from vendor's website.

References