T05 · Unauthorized Access and Privilege Escalation
Note
- Location
check.sh:7- Finding
Unnecessary Privileged Host Reconnaissance
- Content
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/dev/null 2>&1; then firewallctl status || echo "无法获取防火墙状态" elif [[ "$OSTYPE" == "darwin"* ]]; then /usr/libexec/ApplicationFirewall/socketfilterfw --getglobalstate || echo "防火墙状态未知" else sudo ufw status || echo "防火墙状态未知" fi echo "\n## 打开的端口" if [[ "$OSTYPE" == "darwin"* ]]; then sudo lsof -nP -iTCP -sTCP:LISTEN | awk 'NR>1 {print $9}' | sort | uniq else sudo ss -tuln fi echo "\n## 系统软件更新" if [[ "$OSTYPE" == "darwin"* ]]; then softwareupdate -l || echo "更新检查失败" else sudo apt list --upgradable 2>/dev/null || echo "更新检查失败" fi echo "\n## SSH 服务状态" if pgrep -x sshd >/dev/null; then echo "sshd 正在运行" else echo "sshd 未运行" fi ``` ### Technical Analysis The script performs read-only host reconnaissance, including firewall inspection, listening-port enumeration, package-update discovery, and SSH daemon detection. These operations are consistent with the documented health-check purpose, but several commands are invoked through `sudo` even though they commonly do not require elevated privileges, particularly: ```bash sudo ss -tuln sudo apt list --upgradable ``` Unnecessary use of `sudo` violates least-privilege principles and conditions users to approve elevation for routine inspection. The collected output also reveals the system's network exposure and patch state. The commands are fixed rather than attacker-controlled, so the code does not provide a direct command-injection path or arbitrary root-code execution. The concern is the unnecessarily broad privilege boundary and the collection of security-sensitive host metadata. ### Attack Path 1. A user invokes the local health-check skill. 2. The script reaches one or more commands prefixed with `sudo`. 3. The user m ...[truncated 1054 chars]- Remediation
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