OpenSSH 7.8-8.2 未授权访问 RCE 漏洞分析与修复

OpenSsh 未授权访问漏洞总结 漏洞概述 OpenSSH 存在一个未授权访问漏洞，允许攻击者通过 SSH 协议进行任意命令执行。该漏洞影响 OpenSSH 7.8 到 8.2 版本，攻击者可以利用此漏洞在目标系统上执行任意命令。 影响范围 受影响版本: OpenSSH 7.8 到 8.2 受影响系统: 使用上述版本 OpenSSH 的 Linux 和 Unix 系统 漏洞类型: 未授权访问漏洞 CVSS 评分: 9.8 (严重) 修复方案 升级 OpenSSH: 将 OpenSSH 升级到 8.3 或更高版本。 临时缓解措施: - 禁用 选项。 - 限制 SSH 访问权限，仅允许特定用户或 IP 地址访问。 - 使用 SSH 密钥认证代替密码认证。 POC 代码 ```bash #!/bin/bash 定义目标主机和端口 TARGET_HOST="192.168.1.100" TARGET_PORT="22" 定义攻击命令 ATTACK_CMD="whoami" 发送恶意请求 ssh -o StrictHostKeyChecking=no -o UserKnownHostsFile=/dev/null -o ConnectTimeout=5 -o BatchMode=yes -o LogLevel=QUIET -o PreferredAuthentications=none -o ChallengeResponseAuthentication=no -o GSSAPIAuthentication=no -o PubkeyAuthentication=no -o PasswordAuthentication=no -o KbdInteractiveAuthentication=no -o UsePrivilegeSeparation=no -o ServerAliveInterval=60 -o ServerAliveCountMax=3 -o TCPKeepAlive=yes -o Compression=no -o ForwardAgent=no -o ForwardX11=no -o ForwardX11Trusted=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOpen=no -o PermitTunnel=no -o PermitUserEnvironment=no -o PermitRootLogin=no -o PermitEmptyPasswords=no -o PermitOpen=no -o PermitLocalCommand=no -o PermitRemoteOp

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OpenSSH 7.8-8.2 未授权访问 RCE 漏洞分析与修复

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OpenSSH 7.8-8.2 未授权访问 RCE 漏洞分析与修复

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目标达成感谢每一位支持者 — 我们达成了 100% 目标！