CVE-2017-7805
nss - security update
7.5
HIGH
CVSS 3.1
EPSS 3.2%
描述
During TLS 1.2 exchanges, handshake hashes are generated which point to a message buffer. This saved data is used for later messages but in some cases, the handshake transcript can exceed the space available in the current buffer, causing the allocation of a new buffer. This leaves a pointer pointing to the old, freed buffer, resulting in a use-after-free when handshake hashes are then calculated afterwards. This can result in a potentially exploitable crash. This vulnerability affects Firefox < 56, Firefox ESR < 52.4, and Thunderbird < 52.4.
如何修補 CVE-2017-7805
要修補 CVE-2017-7805,請將受影響套件升級到下列已修補版本。
- —升級至 52.4.0esr-2 或更新版本
- —升級至 2:3.33-1 或更新版本
- —升級至 2:3.26-1+debu7u5 或更新版本
- —升級至 2:3.26-1+debu8u3 或更新版本
- —升級至 1:52.4.0-1 或更新版本
CVE-2017-7805 正在被利用嗎?
低 — EPSS 為 3.2%,目前沒有觀察到大規模利用活動。
受影響套件(5)
- from 0, < 52.4.0esr-2
- from 0, < 2:3.33-1
- from 0, < 2:3.26-1+debu7u5
- from 0, < 2:3.26-1+debu8u3
- from 0, < 1:52.4.0-1
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | HIGH7.5 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |