低危 gnu grub2 跨界内存写
CVE编号
CVE-2021-20233利用情况
暂无补丁情况
官方补丁披露时间
2021-03-04漏洞描述
grub2是GNU社区的一款Linux系统引导程序。 2.06之前版本的grub2中存在安全漏洞。菜单呈现代码中的Setparam_prefix（）执行长度计算，前提是表示带引号的单引号需要3个字符，而实际上需要4个字符，这使得攻击者可以为输入中的每个引号破坏一个字节的内存。此漏洞的最大威胁是数据机密性和完整性以及系统可用性。目前没有详细漏洞细节提供。解决建议
厂商已发布了漏洞修复程序，请及时关注更新：https://lists.debian.org/debian-security-announce/2021/msg00048.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 | |||||||||
| 应用 | gnu | grub2 | * | Up to (excluding) 2.06 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alibaba_cloud_linux_2.1903 | grub2-pc | * | Up to (excluding) 2.02-0.87.1.al7.alnx | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.17 | grub | * | Up to (excluding) 2.06-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.18 | grub | * | Up to (excluding) 2.06-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_edge | grub | * | Up to (excluding) 2.06-r0 | |||||
| 运行在以下环境 | |||||||||
| 系统 | amazon_2 | grub2 | * | Up to (excluding) 2.06-2.amzn2.0.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | anolis_os_8 | fwupd (Anolis OS 8.4) | * | Up to (excluding) 2.02-87.0.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | anolis_os_8.2 | fwupd | * | Up to (excluding) 2.02-87.0.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | centos_7 | grub2-ppc64le-modules | * | Up to (excluding) 2.02-0.87.el7_9.2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | centos_8 | shim-x64 | * | Up to (excluding) 2.02-90.el8_3.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | grub2 | * | Up to (excluding) 2.02+dfsg1-20+deb10u4 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | grub2 | * | Up to (excluding) 2.04-16 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | grub2 | * | Up to (excluding) 2.04-16 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | grub2 | * | Up to (including) 2.02~beta3-5+deb9u2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | grub2 | * | Up to (excluding) 2.04-16 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_32 | shim-unsigned-ia32-debuginfo | * | Up to (excluding) 15.4-2.fc32 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_33 | shim | * | Up to (excluding) 15.4-1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_34 | efi-filesystem | * | Up to (excluding) 5-2.fc34 | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.2 | grub2-branding-upstream | * | Up to (excluding) 2.04-lp152.7.22.7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | oracle_7 | oraclelinux-release | * | Up to (excluding) 2.02-0.87.0.7.el7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | oracle_8 | oraclelinux-release | * | Up to (excluding) 2.02-90.0.2.el8 | |||||
| 运行在以下环境 | |||||||||
| 系统 | redhat_7 | grub2 | * | Up to (excluding) 2.02-0.87.el7_9.2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | redhat_8 | shim-x64 | * | Up to (excluding) 2.02-90.el8_3.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | suse_12_SP5 | grub2-x86_64-xen | * | Up to (excluding) 2.02-12.47.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_16.04.7_lts | grub2-unsigned | * | Up to (excluding) 2.04-1ubuntu42 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04 | grub2-unsigned | * | Up to (excluding) 1.167~18.04.5 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04.5_lts | grub2-signed | * | Up to (excluding) 1.167~18.04.5 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_20.04 | grub2-unsigned | * | Up to (excluding) 2.04-1ubuntu44.2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_21.04 | grub2-unsigned | * | Up to (excluding) 2.04-1ubuntu42 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_21.10 | grub2-unsigned | * | Up to (excluding) 1.169 | |||||
- 攻击路径 远程
- 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
| CWE-ID | 漏洞类型 |
| CWE-787 | 跨界内存写 |
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