低危 qemu qemu 跨界内存读
CVE编号
CVE-2021-20221利用情况
EXP 已公开补丁情况
官方补丁披露时间
2021-05-14漏洞描述
An out-of-bounds heap buffer access issue was found in the ARM Generic Interrupt Controller emulator of QEMU up to and including qemu 4.2.0on aarch64 platform. The issue occurs because while writing an interrupt ID to the controller memory area, it is not masked to be 4 bits wide. It may lead to the said issue while updating controller state fields and their subsequent processing. A privileged guest user may use this flaw to crash the QEMU process on the host resulting in DoS scenario.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。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 | * | Up to (including) 4.2.0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.16 | qemu | * | Up to (excluding) 5.0.0-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.17 | qemu | * | Up to (excluding) 5.0.0-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.18 | qemu | * | Up to (excluding) 5.0.0-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_edge | qemu | * | Up to (excluding) 5.0.0-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | anolis_os_8 | ruby-libguestfs | * | Up to (excluding) 1.40.2-27.0.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | centos_8 | libvirt-daemon-driver-nodedev | * | Up to (excluding) 1.40.2-27.module+el8.4.0+9282+0bdec052 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | qemu | * | Up to (excluding) 1:3.1+dfsg-8+deb10u9 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | qemu | * | Up to (excluding) 1:5.2+dfsg-4 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | qemu | * | Up to (excluding) 1:5.2+dfsg-4 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | qemu | * | Up to (excluding) 1:2.8+dfsg-6+deb9u13 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | qemu | * | Up to (excluding) 1:5.2+dfsg-4 | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.2 | qemu-lang | * | Up to (excluding) 4.2.1-lp152.9.9.5 | |||||
| 运行在以下环境 | |||||||||
| 系统 | oracle_7 | oraclelinux-release | * | Up to (excluding) 4.2.1-9.el7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | oracle_8 | libvirt-daemon-driver-storage-gluster | * | Up to (excluding) 6.0.0-35.1.0.1.module+el8.4.0+20285+126f2e4b | |||||
| 运行在以下环境 | |||||||||
| 系统 | redhat_8 | libvirt-daemon-driver-nodedev | * | Up to (excluding) 1.40.2-27.module+el8.4.0+9282+0bdec052 | |||||
| 运行在以下环境 | |||||||||
| 系统 | suse_12_SP5 | qemu | * | Up to (excluding) 3.1.1.1-48.2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04 | qemu | * | Up to (excluding) 1:2.11+dfsg-1ubuntu7.37 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04.5_lts | qemu | * | Up to (excluding) 1:2.11+dfsg-1ubuntu7.37 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_20.04 | qemu | * | Up to (excluding) 1:4.2-3ubuntu6.17 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_21.04 | qemu | * | Up to (excluding) 1:5.2+dfsg-6ubuntu2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_21.10 | qemu | * | Up to (excluding) 1:5.2+dfsg-6ubuntu2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_22.04 | qemu | * | Up to (excluding) 1:5.2+dfsg-6ubuntu2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_22.10 | qemu | * | Up to (excluding) 1:5.2+dfsg-6ubuntu2 | |||||
- 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 EXP 已公开
- 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
| CWE-ID | 漏洞类型 |
| CWE-125 | 跨界内存读 |
| CWE-787 | 跨界内存写 |
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