CVE-2021-20305
nettle - security update
8.1
HIGH
CVSS 3.1
EPSS 1.6%
描述
A flaw was found in Nettle in versions before 3.7.2, where several Nettle signature verification functions (GOST DSA, EDDSA & ECDSA) result in the Elliptic Curve Cryptography point (ECC) multiply function being called with out-of-range scalers, possibly resulting in incorrect results. This flaw allows an attacker to force an invalid signature, causing an assertion failure or possible validation. The highest threat to this vulnerability is to confidentiality, integrity, as well as system availability.
如何修補 CVE-2021-20305
要修補 CVE-2021-20305,請將受影響套件升級到下列已修補版本。
- —升級至 3.7.2-r0 或更新版本
- —升級至 3.7.2-1 或更新版本
- —升級至 3.3-1+deb9u1 或更新版本
- —升級至 3.4.1-1+deb10u1 或更新版本
CVE-2021-20305 正在被利用嗎?
低 — EPSS 為 1.6%,目前沒有觀察到大規模利用活動。
受影響套件(4)
- from 0, < 3.7.2-r0
- from 0, < 3.7.2-1
- from 0, < 3.3-1+deb9u1
- from 0, < 3.4.1-1+deb10u1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH8.1 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H |