低危 fail2ban fail2ban 对生成代码的控制不恰当（代码注入）
CVE编号
CVE-2021-32749利用情况
暂无补丁情况
官方补丁披露时间
2021-07-17漏洞描述
fail2ban is a daemon to ban hosts that cause multiple authentication errors. In versions 0.9.7 and prior, 0.10.0 through 0.10.6, and 0.11.0 through 0.11.2, there is a vulnerability that leads to possible remote code execution in the mailing action mail-whois. Command `mail` from mailutils package used in mail actions like `mail-whois` can execute command if unescaped sequences (`\n~`) are available in "foreign" input (for instance in whois output). To exploit the vulnerability, an attacker would need to insert malicious characters into the response sent by the whois server, either via a MITM attack or by taking over a whois server. The issue is patched in versions 0.10.7 and 0.11.3. As a workaround, one may avoid the usage of action `mail-whois` or patch the vulnerability manually.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 | fail2ban | fail2ban | * | Up to (including) 0.9.7 | |||||
| 运行在以下环境 | |||||||||
| 应用 | fail2ban | fail2ban | * | From (including) 0.10.0 | Up to (excluding) 0.10.7 | ||||
| 运行在以下环境 | |||||||||
| 应用 | fail2ban | fail2ban | * | From (including) 0.11.0 | Up to (excluding) 0.11.3 | ||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.15 | fail2ban | * | Up to (excluding) 0.11.2-r1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.16 | fail2ban | * | Up to (excluding) 0.11.2-r2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.17 | fail2ban | * | Up to (excluding) 0.11.2-r2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_3.18 | fail2ban | * | Up to (excluding) 0.11.2-r2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | alpine_edge | fail2ban | * | Up to (excluding) 0.11.2-r2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_10 | fail2ban | * | Up to (including) 0.10.2-2.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_11 | fail2ban | * | Up to (excluding) 0.11.2-2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_12 | fail2ban | * | Up to (excluding) 0.11.2-2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_9 | fail2ban | * | Up to (including) 0.9.6-2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | debian_sid | fail2ban | * | Up to (excluding) 0.11.2-2 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_34 | fail2ban-shorewall-lite | * | Up to (excluding) 0.11.2-9.fc34 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_35 | fail2ban-shorewall-lite | * | Up to (excluding) 0.11.2-9.fc35 | |||||
| 运行在以下环境 | |||||||||
| 系统 | fedora_EPEL_7 | fail2ban-all | * | Up to (excluding) 0.11.2-3.el7 | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.2 | fail2ban | * | Up to (excluding) 0.11.2-bp153.2.3.1 | |||||
| 运行在以下环境 | |||||||||
| 系统 | opensuse_Leap_15.3 | fail2ban | * | Up to (excluding) 0.11.2-bp153.2.3.1 | |||||
- 攻击路径 远程
- 攻击复杂度 容易
- 权限要求 无需权限
- 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 N/A
| CWE-ID | 漏洞类型 |
| CWE-78 | OS命令中使用的特殊元素转义处理不恰当（OS命令注入） |
| CWE-94 | 对生成代码的控制不恰当（代码注入） |
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