CVE-2020-27749
6.7
MEDIUM
CVSS 3.1
EPSS 0.57%
描述
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.
如何修補 CVE-2020-27749
要修補 CVE-2020-27749,請將受影響套件升級到下列已修補版本。
- —升級至 2.06-r0 或更新版本
- —升級至 2.04-16 或更新版本
CVE-2020-27749 正在被利用嗎?
低 — EPSS 為 0.6%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- from 0, < 2.06-r0
- from 0, < 2.04-16
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM6.7 | CVSS:3.1/AV:L/AC:L/PR:H/UI:N/S:U/C:H/I:H/A:H |