中危 xen xen 特权管理不恰当
CVE编号
CVE-2021-27379利用情况
暂无补丁情况
官方补丁披露时间
2021-02-19漏洞描述
An issue was discovered in Xen through 4.11.x, allowing x86 Intel HVM guest OS users to achieve unintended read/write DMA access, and possibly cause a denial of service (host OS crash) or gain privileges. This occurs because a backport missed a flush, and thus IOMMU updates were not always correct. NOTE: this issue exists because of an incomplete fix for CVE-2020-15565.解决建议
建议您更新当前系统或软件至最新版，完成漏洞的修复。
参考链接 |
|
|---|---|
| http://www.openwall.com/lists/oss-security/2021/02/23/1 | |
| http://xenbits.xen.org/xsa/advisory-366.html | |
| https://www.debian.org/security/2021/dsa-4888 | |
| https://xenbits.xen.org/xsa/advisory-366.html |
受影响软件情况
| # | 类型 | 厂商 | 产品 | 版本 | 影响面 | ||||
| 1 | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | xen | * | Up to (excluding) 4.11.4+99-g8bce4698f6-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | xen | * | Up to (excluding) 4.14.0+80-gd101b417b7-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | xen | * | Up to (excluding) 4.14.0+80-gd101b417b7-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | xen | * | Up to (excluding) 4.8.3+xsa262+shim4.10.0+comet3-1+deb9u6 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | xen | * | Up to (excluding) 4.14.0+80-gd101b417b7-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | xen | xen | * | From (including) 3.2.0 | Up to (excluding) 4.12.0 | ||||
- 攻击路径 本地
- 攻击复杂度 容易
- 权限要求 普通权限
- 影响范围 全局影响
- EXP成熟度 N/A
- 补丁情况 官方补丁
- 数据保密性 数据泄露
- 数据完整性 传输被破坏
- 服务器危害 DoS
- 全网数量 N/A
| CWE-ID | 漏洞类型 |
| CWE-269 | 特权管理不恰当 |
| NVD-CWE-Other |
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