kastelldev/kastell

v1.17.1 Security

This release includes 6 security fixes for security teams reviewing exposed deployments.

Published 2mo Server & OS Management

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✓ No known CVEs patched

Read the diff → Tool health → What is this tool? →

This release patches 6 known CVEs

Topics

automation cli coolify devops digitalocean docker

+10 more

dokploy hetzner linode mcp security-audit self-hosted server-management typescript vps vultr

Affected surfaces

auth rbac rce_ssrf deps

Summary

AI summary

Security hardening with 28 defence‑in‑depth fixes from a security audit.

Full changelog

v1.17.1 — Security Hardening

28 defence-in-depth fixes from 5-skill security audit.

Security

sshExec type narrowing — accepts SshCommand only, 33 callers wrapped with raw()
SAFE_MODE typo-safe — accepts "yes"/"1"/"on", warns on unrecognized values
sanitizedEnv() expanded — 10 secret patterns (up from 4)
Rollback SHA256 integrity — checksum verified before restore script execution
MCP error sanitization — all 12 tool handlers route through sanitizeStderr
Path traversal guard — relPath allowlist regex in rollback
backupPath Zod regex — format validation prevents injection via tampered history
SHELL_METACHAR — added & to block && on fallback path
sedReplace path quoting — POSIX single-quote escape
DEBIAN_FRONTEND scope — both apt-get commands covered

Changed

scheduleManager: execSync replaced with spawnSync + DRY helper
encryption.ts: execSync replaced with spawnSync array args
Production deps: all 11 pinned to exact versions
isSafeMode() extracted to src/utils/safeMode.ts
Platform fallback: "coolify" changed to "bare" (least privileged)
cmd("") throws, timeoutMs=0 guard, ControlMaster 0o700
debugLog redaction, getServers() hardened, warnIfPermissionError helper

Full Changelog: https://github.com/kastelldev/kastell/compare/v1.17.0...v1.17.1

Security Fixes

Rollback SHA256 integrity check verifies checksum before executing restore script
MCP error sanitization routes all 12 tool handlers through sanitizeStderr
Path traversal guard added via relPath allowlist regex in rollback
backupPath validated with Zod regex to prevent injection via tampered history
SHELL_METACHAR now blocks "&" to stop && on fallback paths
sedReplace path quoting uses POSIX single‑quote escape

View diff on GitHub

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About kastelldev/kastell

Server security auditing and hardening toolkit. 413 security checks across 29 categories (SSH, Firewall, Docker, TLS, HTTP Headers), CIS/PCI-DSS/HIPAA compliance mapping, 19-step production hardening, fleet management, and forensic evidence collection. Supports Hetzner, DigitalOcean, Vultr, and Linode. 13 MCP tools.

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