CVE-2019-1551
openssl - security update
描述
There is an overflow bug in the x64_64 Montgomery squaring procedure used in exponentiation with 512-bit moduli. No EC algorithms are affected. Analysis suggests that attacks against 2-prime RSA1024, 3-prime RSA1536, and DSA1024 as a result of this defect would be very difficult to perform and are not believed likely. Attacks against DH512 are considered just feasible. However, for an attack the target would have to re-use the DH512 private key, which is not recommended anyway. Also applications directly using the low level API BN_mod_exp may be affected if they use BN_FLG_CONSTTIME. Fixed in OpenSSL 1.1.1e (Affected 1.1.1-1.1.1d). Fixed in OpenSSL 1.0.2u (Affected 1.0.2-1.0.2t).
如何修補 CVE-2019-1551
要修補 CVE-2019-1551,請將受影響套件升級到下列已修補版本。
- —升級至 1.1.1d-r2 或更新版本
- —升級至 1.1.1d-r3 或更新版本
CVE-2019-1551 正在被利用嗎?
中等 — EPSS 為 14.3%,可持續追蹤但非最高優先。
受影響套件(2)
- >= 1.0.2, < 1.1.1d-r2
- from 0, < 1.1.1d-r3
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | MEDIUM5.3 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N |