CVE编号
CVE-2021-26933利用情况
暂无补丁情况
官方补丁披露时间
2021-02-17漏洞描述
An issue was discovered in Xen 4.9 through 4.14.x. On Arm, a guest is allowed to control whether memory accesses are bypassing the cache. This means that Xen needs to ensure that all writes (such as the ones during scrubbing) have reached the memory before handing over the page to a guest. Unfortunately, the operation to clean the cache is happening before checking if the page was scrubbed. Therefore there is no guarantee when all the writes will reach the memory.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://xenbits.xen.org/xsa/advisory-364.html | |
| https://lists.fedoraproject.org/archives/list/[email protected]... | |
| https://lists.fedoraproject.org/archives/list/[email protected]... | |
| https://www.debian.org/security/2021/dsa-4888 |
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 | alpine_3.11 | xen | * |
Up to (excluding) 4.13.2-r5 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.12 | xen | * |
Up to (excluding) 4.13.2-r5 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.13 | xen | * |
Up to (excluding) 4.14.1-r2 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.14 | xen | * |
Up to (excluding) 4.14.1-r3 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.15 | xen | * |
Up to (excluding) 4.14.1-r3 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_edge | xen | * |
Up to (excluding) 4.14.1-r3 |
|||||
| 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+88-g1d1d1f5391-2 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | xen | * |
Up to (excluding) 4.8.5.final+shim4.10.4-1+deb9u12 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | xen | * |
Up to (excluding) 4.14.0+88-g1d1d1f5391-2 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | fedoraproject | fedora | 32 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedoraproject | fedora | 33 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_32 | xen | * |
Up to (excluding) 4.13.2-7.fc32 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_33 | xen | * |
Up to (excluding) 4.14.1-5.fc33 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | xen | xen | * |
From (including) 4.9.0 |
Up to (including) 4.14.1 |
||||
- 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 有限影响
- 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 无影响
- 全网数量 N/A
还没有评论，来说两句吧...