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6.4Mittel

CVE-2025-0686Grub2: romfs: integer overflow when handling symlinks may lead to heap based out-of-bounds write when reading dat

grub2; Red Hat Red Hat Enterprise Linux 10; Red Hat Red Hat Enterprise Linux 7; Red Hat Red Hat Enterprise Linux 8 Veröffentlicht: (vor 1 Jahr)

Beschreibung

A flaw was found in grub2. When performing a symlink lookup from a romfs filesystem, grub's romfs filesystem module uses user-controlled parameters from the filesystem geometry to determine the internal buffer size, however, it improperly checks for integer overflows. A maliciously crafted filesystem may lead some of those buffer size calculations to overflow, causing it to perform a grub_malloc() operation with a smaller size than expected. As a result, the grub_romfs_read_symlink() may cause out-of-bounds writes when the calling grub_disk_read() function. This issue may be leveraged to corrupt grub's internal critical data and can result in arbitrary code execution by-passing secure boot protections.

Schwachstellentyp (CWE): CWE-787

Daten: CVE.org, NVD, CISA KEV, FIRST EPSS, Ubuntu. Wiedergegeben wie in der Quelle, auf Englisch.

Betroffene Produkte und Versionen

HerstellerProduktVersionen
gnu grub2 ≤ 2.12
Red Hat Red Hat Enterprise Linux 10 —
Red Hat Red Hat Enterprise Linux 7 —
Red Hat Red Hat Enterprise Linux 8 —
Red Hat Red Hat Enterprise Linux 9 —
Red Hat Red Hat OpenShift Container Platform 4 —
— grub2 ≤ 2.12

Referenzen und Patches

CPE-Treffer (NVD) (1)
  • cpe:2.3:a:gnu:grub2:*:*:*:*:*:*:*:* ≤ 2.12

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