CVE-2021-23840
Integer overflow in CipherUpdate
描述
Calls to EVP_CipherUpdate, EVP_EncryptUpdate and EVP_DecryptUpdate may overflow the output length argument in some cases where the input length is close to the maximum permissable length for an integer on the platform. In such cases the return value from the function call will be 1 (indicating success), but the output length value will be negative. This could cause applications to behave incorrectly or crash. OpenSSL versions 1.1.1i and below are affected by this issue. Users of these versions should upgrade to OpenSSL 1.1.1j. OpenSSL versions 1.0.2x and below are affected by this issue. However OpenSSL 1.0.2 is out of support and no longer receiving public updates. Premium support customers of OpenSSL 1.0.2 should upgrade to 1.0.2y. Other users should upgrade to 1.1.1j. Fixed in OpenSSL 1.1.1j (Affected 1.1.1-1.1.1i). Fixed in OpenSSL 1.0.2y (Affected 1.0.2-1.0.2x).
如何修補 CVE-2021-23840
要修補 CVE-2021-23840,請將受影響套件升級到下列已修補版本。
- —升級至 1.1.1j-r0 或更新版本
- —升級至 1.1.1j-r0 或更新版本
CVE-2021-23840 正在被利用嗎?
可能 — EPSS 為 50.7%,屬於高被利用機率區間,建議優先修補。
受影響套件(2)
- >= 1.0.2, < 1.1.1j-r0
- from 0, < 1.1.1j-r0
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |