CVE编号
CVE-2021-20196利用情况
暂无补丁情况
官方补丁披露时间
2021-05-27漏洞描述
A NULL pointer dereference flaw was found in the floppy disk emulator of QEMU. This issue occurs while processing read/write ioport commands if the selected floppy drive is not initialized with a block device. This flaw allows a privileged guest user to crash the QEMU process on the host, resulting in a denial of service. The highest threat from this vulnerability is to system availability.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 |
|
|---|---|
| https://bugs.launchpad.net/qemu/+bug/1912780 | |
| https://lists.debian.org/debian-lts-announce/2022/04/msg00002.html | |
| https://security.netapp.com/advisory/ntap-20210708-0004/ | |
| https://www.openwall.com/lists/oss-security/2021/01/28/1 |
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 | |||||||||
| 应用 | qemu | qemu | 5.2.0 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.15 | qemu | * |
Up to (excluding) 6.1.1-r0 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | qemu | * |
Up to (excluding) 3.1+dfsg-8+deb10u8 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | qemu | * |
Up to (excluding) 5.2+dfsg-11+deb11u1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | qemu | * |
Up to (excluding) 6.1+dfsg-8 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | qemu | * |
Up to (excluding) 1:2.8+dfsg-6+deb9u17 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | qemu | * |
Up to (excluding) 6.1+dfsg-8 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.3 | qemu | * |
Up to (excluding) 5.2.0-150300.109.2 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.4 | qemu | * |
Up to (excluding) 4.2.1-11.34.2 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | oracle_7 | qemu | * |
Up to (excluding) 4.2.1-15.el7 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | oracle_8 | qemu | * |
Up to (excluding) 1.16.2-4.0.1.module+el8.5.0+20482+a450964e |
|||||
| 运行在以下环境 | |||||||||
| 系统 | suse_12_SP5 | qemu | * |
Up to (excluding) 3.1.1.1-63.4 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_14.04.6_lts | qemu | * |
Up to (excluding) 2021-08-10 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_16.04.7_lts | qemu | * |
Up to (excluding) 2021-03-10 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04.5_lts | qemu | * |
Up to (excluding) 2021-07-08 |
|||||
- 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 未验证
- 补丁情况 官方补丁
- 数据保密性 数据泄露
- 数据完整性 无影响
- 服务器危害 无影响
- 全网数量 N/A
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