* security: add baseline security headers to gateway HTTP responses
All responses from the gateway HTTP server now include
X-Content-Type-Options: nosniff and Referrer-Policy: no-referrer.
These headers are applied early in handleRequest, before any
handler runs, ensuring coverage for every response including
error pages and 404s.
Headers that restrict framing (X-Frame-Options, CSP
frame-ancestors) are intentionally omitted at this global level
because the canvas host and A2UI handlers serve content that may
be loaded inside frames.
* fix: apply security headers before WebSocket upgrade check
Move setDefaultSecurityHeaders() above the WebSocket early-return so
the headers are set on every HTTP response path including upgrades.
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Co-authored-by: Vincent Koc <vincentkoc@ieee.org>
Replace Math.random() with crypto.randomBytes() for generating
temporary file names. Math.random() is predictable and can enable
TOCTOU race conditions. Also set mode 0o600 on TTS temp files.
Co-authored-by: sirishacyd <sirishacyd@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Replace execSync (which spawns a shell) with execFileSync (which
invokes the binary directly with an argv array). This eliminates
command injection risk from interpolated arguments.
Co-authored-by: sirishacyd <sirishacyd@gmail.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>
Command text displayed in Discord exec-approval embeds was not sanitized,
allowing crafted commands containing backticks to break out of the markdown
code block and inject arbitrary Discord formatting. This fix inserts a
zero-width space before each backtick to neutralize markdown injection.
The previous implementation returned early when buffer lengths differed,
leaking the expected secret's length via timing side-channel. Hashing both
inputs with SHA-256 before comparison ensures fixed-length buffers and
constant-time comparison regardless of input lengths.
YAML 1.1 default schema silently coerces values like "on" to true and
"off" to false, which can cause unexpected behavior in frontmatter
parsing. Explicitly set schema: "core" to use YAML 1.2 rules that
only recognize true/false/null literals.
* fix(security): block plaintext WebSocket connections to non-loopback addresses
Addresses CWE-319 (Cleartext Transmission of Sensitive Information).
Previously, ws:// connections to remote hosts were allowed, exposing
both credentials and chat data to network interception. This change
blocks ALL plaintext ws:// connections to non-loopback addresses,
regardless of whether explicit credentials are configured (device
tokens may be loaded dynamically).
Security policy:
- wss:// allowed to any host
- ws:// allowed only to loopback (127.x.x.x, localhost, ::1)
- ws:// to LAN/tailnet/remote hosts now requires TLS
Changes:
- Add isSecureWebSocketUrl() validation in net.ts
- Block insecure connections in GatewayClient.start()
- Block insecure URLs in buildGatewayConnectionDetails()
- Handle malformed URLs gracefully without crashing
- Update tests to use wss:// for non-loopback URLs
Fixes#12519
* fix(test): update gateway-chat mock to preserve net.js exports
Use importOriginal to spread actual module exports and mock only
the functions needed for testing. This ensures isSecureWebSocketUrl
and other exports remain available to the code under test.
