CVE-2019-15753
OpenStack os-vif Ageing time of 0 disables linuxbridge MAC learning
9.1
CRITICAL
CVSS 3.1
EPSS 0.97%
描述
In OpenStack os-vif 1.15.x before 1.15.2, and 1.16.0, a hard-coded MAC aging time of 0 disables MAC learning in linuxbridge, forcing obligatory Ethernet flooding of non-local destinations, which both impedes network performance and allows users to possibly view the content of packets for instances belonging to other tenants sharing the same network. Only deployments using the linuxbridge backend are affected. This occurs in PyRoute2.add() in internal/command/ip/linux/impl_pyroute2.py.
如何修補 CVE-2019-15753
要修補 CVE-2019-15753,請將受影響套件升級到下列已修補版本。
- —升級至 1.15.2-1 或更新版本
- —升級至 1.15.2 或更新版本
CVE-2019-15753 正在被利用嗎?
低 — EPSS 為 1.0%,目前沒有觀察到大規模利用活動。
受影響套件(2)
- from 0, < 1.15.2-1
- >= 1.15.0, < 1.15.2
CVSS 分數
| 來源 | 版本 | 嚴重程度 | 向量 |
|---|---|---|---|
| osv | CVSS 3.1 | CRITICAL9.1 | CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |