CVE编号
CVE-2019-14821利用情况
暂无补丁情况
官方补丁披露时间
2019-09-20漏洞描述
在Linux内核（所有版本到5.3）中发现了越界访问问题，这是Linux内核的KVM虚拟机管理程序实现Coalesced MMIO写入操作的方式。它在MMIO环形缓冲区“ struct kvm_coalesced_mmio”对象上运行，其中写索引“ ring-> first”和“ ring-> last”值可以由主机用户空间进程提供。拥有'/dev/kvm设备访问权限的无特权主机用户或进程可能会利用此漏洞使主机内核崩溃，从而导致服务被拒绝或系统上潜在的特权升级。解决建议
厂商已发布了漏洞修复程序，请及时关注更新：https://git.kernel.org/pub/scm/virt/kvm/kvm.git/commit/?id=b60fe990c6b07ef6d4df67bc0530c7c90a62623a
参考链接 |
|
|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00036.html | |
| http://lists.opensuse.org/opensuse-security-announce/2019-10/msg00037.html | |
| http://packetstormsecurity.com/files/154951/Kernel-Live-Patch-Security-Notice... | |
| http://packetstormsecurity.com/files/155212/Slackware-Security-Advisory-Slack... | |
| http://www.openwall.com/lists/oss-security/2019/09/20/1 | |
| https://access.redhat.com/errata/RHSA-2019:3309 | |
| https://access.redhat.com/errata/RHSA-2019:3517 | |
| https://access.redhat.com/errata/RHSA-2019:3978 | |
| https://access.redhat.com/errata/RHSA-2019:3979 | |
| https://access.redhat.com/errata/RHSA-2019:4154 | |
| https://access.redhat.com/errata/RHSA-2019:4256 | |
| https://access.redhat.com/errata/RHSA-2020:0027 | |
| https://access.redhat.com/errata/RHSA-2020:0204 | |
| https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2019-14821 | |
| https://lists.debian.org/debian-lts-announce/2019/09/msg00025.html | |
| https://lists.debian.org/debian-lts-announce/2019/10/msg00000.html | |
| https://lists.fedoraproject.org/archives/list/[email protected]... | |
| https://lists.fedoraproject.org/archives/list/[email protected]... | |
| https://seclists.org/bugtraq/2019/Nov/11 | |
| https://seclists.org/bugtraq/2019/Sep/41 | |
| https://security.netapp.com/advisory/ntap-20191004-0001/ | |
| https://usn.ubuntu.com/4157-1/ | |
| https://usn.ubuntu.com/4157-2/ | |
| https://usn.ubuntu.com/4162-1/ | |
| https://usn.ubuntu.com/4162-2/ | |
| https://usn.ubuntu.com/4163-1/ | |
| https://usn.ubuntu.com/4163-2/ | |
| https://www.debian.org/security/2019/dsa-4531 | |
| https://www.oracle.com/security-alerts/cpuapr2020.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 | linux | linux_kernel | * |
Up to (including) 5.3 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | redhat | enterprise_linux | 5.0 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | redhat | enterprise_linux | 6.0 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | redhat | enterprise_linux | 7.0 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | redhat | enterprise_linux | 8.0 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | redhat_6 | kernel | * |
Up to (excluding) 0:2.6.32-754.25.1.el6 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | redhat_7 | bpftool | * |
Up to (excluding) 0:3.10.0-1062.7.1.el7 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | redhat_7 | kernel-rt | * |
Up to (excluding) 0:3.10.0-1062.7.1.rt56.1030.el7 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | redhat_7 | kpatch-patch-3_10_0-1062 | * |
Up to (excluding) 0:1-11.el7 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | sles_12 | kernel-azure | * |
Up to (excluding) 4.12.14-6.26 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_14.04_lts | linux-aws | * |
Up to (excluding) 4.4.0-1056.60 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_16.04_lts | linux | * |
Up to (excluding) 4.4.0-166.195 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04_lts | linux | * |
Up to (excluding) 4.15.0-66.75 |
|||||
- 攻击路径 本地
- 攻击复杂度 复杂
- 权限要求 普通权限
- 影响范围 越权影响
- EXP成熟度 未验证
- 补丁情况 官方补丁
- 数据保密性 无影响
- 数据完整性 无影响
- 服务器危害 无影响
- 全网数量 100
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