低危 Linux kernel输入验证错误漏洞
CVE编号
CVE-2021-33909利用情况
POC 已公开补丁情况
官方补丁披露时间
2021-07-21漏洞描述
Linux kernel是美国Linux美国基金会的开源操作系统Linux所使用的内核。它存在输入验证错误漏洞，该漏洞源于一个越界写入的缺陷。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-5.13.4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 | alibaba_cloud_linux_2.1903 | kernel | * | Up to (excluding) 1.0-20210722175726.al7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | amazon_2 | kernel | * | Up to (excluding) 1.0-3.amzn2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | amazon_AMI | kernel | * | Up to (excluding) 4.14.238-125.422.amzn1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | anolis_os_7 | kernel | * | Up to (excluding) 4.19 | |||||
| 运行在以下环境 | |||||||||
| 系统 | anolis_os_8 | kernel | * | Up to (excluding) 4.18 | |||||
| 运行在以下环境 | |||||||||
| 系统 | anolis_os_8.2 | kernel | * | Up to (excluding) 4.18.0-193.60.2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | centos_7 | kpatch-patch | * | Up to (excluding) 3.10.0-1160.36.2.el7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | centos_8 | kpatch-patch | * | Up to (excluding) 4.18.0-305.10.2.el8_4 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian | debian_linux | 10.0 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian | debian_linux | 9.0 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | linux | * | Up to (excluding) 4.19.194-3 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | linux | * | Up to (excluding) 5.10.46-2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | linux | * | Up to (excluding) 5.10.46-2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | linux | * | Up to (excluding) 4.9.272-2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | linux | * | Up to (excluding) 5.10.46-2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedoraproject | fedora | 34 | - | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_34 | kernel | * | Up to (excluding) 5.13.4-200.fc34 | |||||
| 运行在以下环境 | |||||||||
| 系统 | kylinos_aarch64_V10SP2 | kernel | * | Up to (excluding) 4.19.90-25.11.v2101.ky10 | |||||
| 运行在以下环境 | |||||||||
| 系统 | kylinos_x86_64_V10SP2 | kernel | * | Up to (excluding) 4.19.90-25.11.v2101.ky10 | |||||
| 运行在以下环境 | |||||||||
| 系统 | linux | linux_kernel | * | From (including) 3.16 | Up to (excluding) 5.13.4 | ||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.2 | kernel | * | Up to (excluding) 5.3.18-lp152.84.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.3 | kernel | * | Up to (excluding) 5.3.18-59.16.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | oracle_6 | kernel | * | Up to (excluding) 2.6.32-754.35.1.0.4.el6 | |||||
| 运行在以下环境 | |||||||||
| 系统 | oracle_7 | kernel | * | Up to (excluding) 4.14.35-2047.505.4.3.el7uek | |||||
| 运行在以下环境 | |||||||||
| 系统 | oracle_8 | kernel | * | Up to (excluding) 4.18.0-305.10.2.el8_4 | |||||
| 运行在以下环境 | |||||||||
| 系统 | redhat_6 | kernel | * | Up to (excluding) 0:2.6.32-754.41.2.el6 | |||||
| 运行在以下环境 | |||||||||
| 系统 | redhat_7 | kpatch-patch-3_10_0-1160 | * | Up to (excluding) 3.10.0-1160.36.2.el7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | redhat_8 | kpatch-patch | * | Up to (excluding) 4.18.0-305.10.2.el8_4 | |||||
| 运行在以下环境 | |||||||||
| 系统 | suse_12_SP5 | kernel | * | Up to (excluding) 4.12.14-122.80.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04 | linux-hwe-5.4 | * | Up to (excluding) 4.15.0-151.157 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_18.04.5_lts | linux | * | Up to (excluding) 4.15.0-151.157 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_20.04 | linux-bluefield | * | Up to (excluding) 5.4.0-1041.45 | |||||
| 运行在以下环境 | |||||||||
| 系统 | ubuntu_21.04 | linux | * | Up to (excluding) 5.11.0-1012.13 | |||||
- 攻击路径 远程
- 攻击复杂度 复杂
- 权限要求 无需权限
- 影响范围 有限影响
- EXP成熟度 POC 已公开
- 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 N/A
| CWE-ID | 漏洞类型 |
| CWE-120 | 未进行输入大小检查的缓冲区拷贝（传统缓冲区溢出） |
| CWE-190 | 整数溢出或超界折返 |
| CWE-787 | 跨界内存写 |
Exp相关链接
- avd.aliyun.com
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