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CVE-2024-1048— Grub2: grub2-set-bootflag can be abused by local (pseudo-)users

Quick assessment

Affected
Red Hat Red Hat Enterprise Linux 8
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

grub2是美国GNU社区的一款Linux系统引导程序。 grub2存在安全漏洞，该漏洞源于如果程序在重命名操作之前被终止，临时文件将不会被删除，并且在多次调用时可能会填满文件系统，导致文件系统没有可用的 inode 或 blocks。

CVSS 3.3 · Low EPSS 0.27% · P19
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I. Basic Information for CVE-2024-1048

Vulnerability Information
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Vulnerability Title
Grub2: grub2-set-bootflag can be abused by local (pseudo-)users
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
清理环节不完整
Source: CVE Program / CVE List V5
Vulnerability Title
grub2 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
grub2是美国GNU社区的一款Linux系统引导程序。 grub2存在安全漏洞，该漏洞源于如果程序在重命名操作之前被终止，临时文件将不会被删除，并且在多次调用时可能会填满文件系统，导致文件系统没有可用的 inode 或 blocks。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Red Hat Red Hat Enterprise Linux 8 1:2.02-156.el8 ~ * cpe:/o:redhat:enterprise_linux:8::baseos
Red Hat Red Hat Enterprise Linux 9 1:2.06-77.el9 ~ * cpe:/o:redhat:enterprise_linux:9::baseos
Red Hat Red Hat Enterprise Linux 6 - cpe:/o:redhat:enterprise_linux:6
Red Hat Red Hat Enterprise Linux 7 - cpe:/o:redhat:enterprise_linux:7

II. Public POCs for CVE-2024-1048

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III. Intelligence Information for CVE-2024-1048

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Vendor Advisories for CVE-2024-1048 (5)

Mailing List Discussions for CVE-2024-1048 (4)

IV. Related Vulnerabilities

Same weakness: CWE-459

V. Comments for CVE-2024-1048

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