CVE-2021-3695

Katalog CVE

CVSS 4.5 · Medium EPSS 0,46%

Kerentanan Out-of-bounds Write pada gnu grub2, fedoraproject fedora +12 lainnya. Skor CVSS 3.1 4.5 (Medium) menurut NVD.

Deskripsi (NVD)

A crafted 16-bit grayscale PNG image may lead to a out-of-bounds write in the heap area. An attacker may take advantage of that to cause heap data corruption or eventually arbitrary code execution and circumvent secure boot protections. This issue has a high complexity to be exploited as an attacker needs to perform some triage over the heap layout to achieve signifcant results, also the values written into the memory are repeated three times in a row making difficult to produce valid payloads. This flaw affects grub2 versions prior grub-2.12.

Rincian

Terbit di NVD

6 Juli 2022

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

4.5 (Medium), sumber NVD
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:L · uraikan di kalkulator

Jenis kelemahan (CWE)

CWE-787: Out-of-bounds Write

EPSS (30 hari)

0,46% peluang dieksploitasi; lebih tinggi dari 38,4% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bugzilla.redhat.com/show_bug.cgi?id=1991685 issue tracking · advisory pihak ketiga
• https://security.gentoo.org/glsa/202209-12 advisory pihak ketiga
• https://security.netapp.com/advisory/ntap-20220930-0001/ advisory pihak ketiga