CVE-2020-27749

Katalog CVE

CVSS 6.7 · Medium EPSS 0,57%

Kerentanan Stack-based Buffer Overflow pada gnu grub2, redhat enterprise linux +6 lainnya. Skor CVSS 3.1 6.7 (Medium) menurut NVD.

Deskripsi (NVD)

A flaw was found in grub2 in versions prior to 2.06. Variable names present are expanded in the supplied command line into their corresponding variable contents, using a 1kB stack buffer for temporary storage, without sufficient bounds checking. If the function is called with a command line that references a variable with a sufficiently large payload, it is possible to overflow the stack buffer, corrupt the stack frame and control execution which could also circumvent Secure Boot protections. The highest threat from this vulnerability is to data confidentiality and integrity as well as system availability.

Rincian

Terbit di NVD

3 Maret 2021

Terakhir diubah

17 Juni 2026

Status NVD

Modified

CVSS 3.1

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

Jenis kelemahan (CWE)

CWE-121: Stack-based Buffer Overflow
CWE-787: Out-of-bounds Write

EPSS (30 hari)

0,57% peluang dieksploitasi; lebih tinggi dari 45,8% CVE lain

Produk dan versi terdampak

> Data dari konfigurasi CPE di NVD.

Referensi dan perbaikan

• https://bugzilla.redhat.com/show_bug.cgi?id=1899966 issue tracking · patch · advisory pihak ketiga
• https://security.gentoo.org/glsa/202104-05 advisory pihak ketiga
• https://security.netapp.com/advisory/ntap-20220325-0001/ advisory pihak ketiga
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/ZWZ36QK4IKU6M...