CVE-2024-1048: grub2 — Fix

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.

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CVSS v3.1 Score

3.3

LOW

CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L

Weakness Type (CWE)

CWE-459 CWE-459

Affected Products

Vendor	Product	Versions
gnu	grub2	All
redhat	enterprise_linux	All
redhat	enterprise_linux	All
fedoraproject	fedora	All

References

Advisories & Patches

https://access.redhat.com/security/cve/CVE-2024-1048 https://bugzilla.redhat.com/show_bug.cgi?id=2256827 https://access.redhat.com/security/cve/CVE-2024-1048 https://bugzilla.redhat.com/show_bug.cgi?id=2256827

Other References

https://access.redhat.com/errata/RHSA-2024:2456 https://access.redhat.com/errata/RHSA-2024:3184 https://www.openwall.com/lists/oss-security/2024/02/06/3 http://www.openwall.com/lists/oss-security/2024/02/06/3 https://access.redhat.com/errata/RHSA-2024:2456 https://access.redhat.com/errata/RHSA-2024:3184 https://lists.fedoraproject.org/archives/list/[email protected]/message/XRZQCVZ3XOASVFT6XLO7F2ZXOLOHIJZQ/ https://lists.fedoraproject.org/archives/list/[email protected]/message/YSJAEGRR3XHMBBBKYOVMII4P34IXEYPE/ https://security.netapp.com/advisory/ntap-20240223-0007/ https://www.openwall.com/lists/oss-security/2024/02/06/3

Frequently Asked Questions

What is CVE-2024-1048? +

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. It has a CVSS v3.1 base score of 3.3 (LOW).

How severe is CVE-2024-1048? +

CVE-2024-1048 has a CVSS v3.1 score of 3.3 out of 10, rated LOW. This is a low-severity vulnerability with limited impact.

What products are affected by CVE-2024-1048? +

CVE-2024-1048 affects products from fedoraproject, gnu, redhat, specifically: enterprise_linux, fedora, grub2. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2024-1048? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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