// For flags

CVE-2024-1048

Grub2: grub2-set-bootflag can be abused by local (pseudo-)users

Severity Score

3.3
*CVSS v3.1

Exploit Likelihood

*EPSS

Affected Versions

*CPE

Public Exploits

0
*Multiple Sources

Exploited in Wild

-
*KEV

Decision

Track
*SSVC
Descriptions

A flaw was found in the grub2-set-bootflag utility of grub2. After the fix of CVE-2019-14865, 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.

Se encontró una falla en la utilidad grub2-set-bootflag de grub2. Después de la corrección de CVE-2019-14865, grub2-set-bootflag creará un archivo temporal con el nuevo contenido de grubenv y le cambiará el nombre al archivo grubenv original. Si el programa se elimina antes de la operación de cambio de nombre, el archivo temporal no se eliminará y puede llenar el sistema de archivos cuando se invoque varias veces, lo que resultará en un sistema de archivos sin inodos o bloques libres.

*Credits: Red Hat would like to thank Solar Designer (CIQ/Rocky Linux) for reporting this issue.
CVSS Scores
Attack Vector
Local
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
* Common Vulnerability Scoring System
SSVC
  • Decision:Track
Exploitation
None
Automatable
No
Tech. Impact
Partial
* Organization's Worst-case Scenario
Timeline
  • 2024-01-29 CVE Reserved
  • 2024-02-06 CVE Published
  • 2024-09-16 CVE Updated
  • 2024-09-17 EPSS Updated
  • ---------- Exploited in Wild
  • ---------- KEV Due Date
  • ---------- First Exploit
CWE
  • CWE-459: Incomplete Cleanup
CAPEC
Affected Vendors, Products, and Versions
Vendor Product Version Other Status
Vendor Product Version Other Status <-- --> Vendor Product Version Other Status
Gnu
Search vendor "Gnu"
 Grub2
Search vendor "Gnu" for product "Grub2"
--
Affected
Redhat
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 Enterprise Linux
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 8.0
Search vendor "Redhat" for product "Enterprise Linux" and version "8.0"
-
Affected
Redhat
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 Enterprise Linux
Search vendor "Redhat" for product "Enterprise Linux"
 9.0
Search vendor "Redhat" for product "Enterprise Linux" and version "9.0"
-
Affected
Fedoraproject
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 Fedora
Search vendor "Fedoraproject" for product "Fedora"
 40
Search vendor "Fedoraproject" for product "Fedora" and version "40"
-
Affected