CVE编号
CVE-2019-20908利用情况
暂无补丁情况
官方补丁披露时间
2020-07-16漏洞描述
在5.4之前的Linux内核的drivers/firmware/efi/efi.c中发现了一个问题。攻击者可利用efivar_ssdt ACPI变量的错误访问权限绕过锁定或安全引导限制，即CID-1957a85b0032。解决建议
目前厂商已发布升级补丁以修复漏洞，补丁获取链接：https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4
参考链接 |
|
|---|---|
| http://lists.opensuse.org/opensuse-security-announce/2020-08/msg00009.html | |
| http://www.openwall.com/lists/oss-security/2020/07/20/6 | |
| http://www.openwall.com/lists/oss-security/2020/07/29/3 | |
| http://www.openwall.com/lists/oss-security/2020/07/30/2 | |
| http://www.openwall.com/lists/oss-security/2020/07/30/3 | |
| https://cdn.kernel.org/pub/linux/kernel/v5.x/ChangeLog-5.4 | |
| https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id... | |
| https://git.zx2c4.com/american-unsigned-language/tree/american-unsigned-language.sh | |
| https://mailarchives.bentasker.co.uk/Mirrors/OSSSec/2020/06-Jun/msg00035.html | |
| https://usn.ubuntu.com/4426-1/ | |
| https://usn.ubuntu.com/4427-1/ | |
| https://usn.ubuntu.com/4439-1/ | |
| https://usn.ubuntu.com/4440-1/ |
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 | |||||||||
| 系统 | canonical | ubuntu_linux | 16.04 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | canonical | ubuntu_linux | 18.04 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | centos_8 | linux | * |
Up to (excluding) 4.18.0-193.14.3.el8_2 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | linux | * |
Up to (excluding) 4.19.132-1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | linux | * |
Up to (excluding) 4.9.228-1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | linux | linux_kernel | * |
Up to (excluding) 5.4 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse | leap | 15.1 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.1 | linux | * |
Up to (excluding) 4.12.14-lp151.28.59.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | oracle linux_7 | linux | * |
Up to (excluding) 4.14.35-1902.305.4.el7uek |
|||||
| 运行在以下环境 | |||||||||
| 系统 | oracle linux_8 | linux | * |
Up to (excluding) 4.18.0-193.14.3.el8_2 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | oracle_7 | linux | * |
Up to (excluding) 4.14.35-1902.305.4.el7uek |
|||||
| 运行在以下环境 | |||||||||
| 系统 | oracle_8 | linux | * |
Up to (excluding) 4.18.0-193.14.3.el8_2 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | redhat_8 | linux | * |
Up to (excluding) 4.18.0-193.14.3.el8_2 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | sles_12_SP5 | linux | * |
Up to (excluding) 4.12.14-16.22.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | suse_12_SP5 | linux | * |
Up to (excluding) 4.12.14-16.22.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_14.04 | linux | * |
Up to (excluding) 4.15.0-1092.102~14.04.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_14.04_lts | linux | * |
Up to (excluding) 3.11.0-12.19 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_16.04 | linux | * |
Up to (excluding) 4.15.0-1080.90~16.04.1 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_16.04_lts | linux | * |
Up to (excluding) 4.2.0-16.19 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04 | linux | * |
Up to (excluding) 4.15.0-1092.102 |
|||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04_lts | linux | * |
Up to (excluding) 4.15.0-112.113 |
|||||
- 攻击路径 本地
- 攻击复杂度 复杂
- 权限要求 管控权限
- 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 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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