fix(security): harden channel token and id generation

CHANGELOG.md

@@ -23,6 +23,7 @@ Docs: https://docs.openclaw.ai
 - Security/Gateway: emit a startup security warning when insecure/dangerous config flags are enabled (including `gateway.controlUi.dangerouslyDisableDeviceAuth=true`) and point operators to `openclaw security audit`.
 - Security/Hooks auth: normalize hook auth rate-limit client IP keys so IPv4 and IPv4-mapped IPv6 addresses share one throttle bucket, preventing dual-form auth-attempt budget bypasses. This ships in the next npm release. Thanks @aether-ai-agent for reporting.
 - Security/Exec approvals: treat `env` and shell-dispatch wrappers as transparent during allowlist analysis on node-host and macOS companion paths so policy checks match the effective executable/inline shell payload instead of the wrapper binary, blocking wrapper-smuggled allowlist bypasses. This ships in the next npm release. Thanks @tdjackey for reporting.
+- Security/Channels: harden Slack external menu token handling by switching to CSPRNG tokens, validating token shape, requiring user identity for external option lookups, and avoiding fabricated timestamp `trigger_id` fallbacks; also switch Tlon Urbit channel IDs to CSPRNG UUIDs and centralize secure ID/token generation via shared infra helpers.
 - Telegram/WSL2: disable `autoSelectFamily` by default on WSL2 and memoize WSL2 detection in Telegram network decision logic to avoid repeated sync `/proc/version` probes on fetch/send paths. (#21916) Thanks @MizukiMachine.
 - Telegram/Streaming: preserve archived draft preview mapping after flush and clean superseded reasoning preview bubbles so multi-message preview finals no longer cross-edit or orphan stale messages under send/rotation races. (#23202) Thanks @obviyus.
 - Slack/Slash commands: preserve the Bolt app receiver when registering external select options handlers so monitor startup does not crash on runtimes that require bound `app.options` calls. (#23209) Thanks @0xgaia.

extensions/tlon/src/urbit/channel-client.ts

@@ -1,3 +1,4 @@
+import { randomUUID } from "node:crypto";
 import type { LookupFn, SsrFPolicy } from "openclaw/plugin-sdk";
 import { ensureUrbitChannelOpen, pokeUrbitChannel, scryUrbitPath } from "./channel-ops.js";
 import { getUrbitContext, normalizeUrbitCookie } from "./context.js";
@@ -43,7 +44,7 @@ export class UrbitChannelClient {
       return;
     }
 
-    const channelId = `${Math.floor(Date.now() / 1000)}-${Math.random().toString(36).substring(2, 8)}`;
+    const channelId = `${Math.floor(Date.now() / 1000)}-${randomUUID()}`;
     this.channelId = channelId;
 
     try {

extensions/tlon/src/urbit/sse-client.ts

@@ -1,3 +1,4 @@
+import { randomUUID } from "node:crypto";
 import { Readable } from "node:stream";
 import type { LookupFn, SsrFPolicy } from "openclaw/plugin-sdk";
 import { ensureUrbitChannelOpen, pokeUrbitChannel, scryUrbitPath } from "./channel-ops.js";
@@ -59,7 +60,7 @@ export class UrbitSSEClient {
     this.url = ctx.baseUrl;
     this.cookie = normalizeUrbitCookie(cookie);
     this.ship = ctx.ship;
-    this.channelId = `${Math.floor(Date.now() / 1000)}-${Math.random().toString(36).substring(2, 8)}`;
+    this.channelId = `${Math.floor(Date.now() / 1000)}-${randomUUID()}`;
     this.channelUrl = new URL(`/~/channel/${this.channelId}`, this.url).toString();
     this.onReconnect = options.onReconnect ?? null;
     this.autoReconnect = options.autoReconnect !== false;
@@ -343,7 +344,7 @@ export class UrbitSSEClient {
     await new Promise((resolve) => setTimeout(resolve, delay));
 
     try {
-      this.channelId = `${Math.floor(Date.now() / 1000)}-${Math.random().toString(36).substring(2, 8)}`;
+      this.channelId = `${Math.floor(Date.now() / 1000)}-${randomUUID()}`;
       this.channelUrl = new URL(`/~/channel/${this.channelId}`, this.url).toString();
 
       if (this.onReconnect) {

src/auto-reply/reply/agent-runner.ts

@@ -1,4 +1,3 @@
-import crypto from "node:crypto";
 import fs from "node:fs";
 import { lookupContextTokens } from "../../agents/context.js";
 import { DEFAULT_CONTEXT_TOKENS } from "../../agents/defaults.js";
@@ -17,6 +16,7 @@ import {
 import type { TypingMode } from "../../config/types.js";
 import { emitAgentEvent } from "../../infra/agent-events.js";
 import { emitDiagnosticEvent, isDiagnosticsEnabled } from "../../infra/diagnostic-events.js";
+import { generateSecureUuid } from "../../infra/secure-random.js";
 import { enqueueSystemEvent } from "../../infra/system-events.js";
 import { defaultRuntime } from "../../runtime.js";
 import { estimateUsageCost, resolveModelCostConfig } from "../../utils/usage-format.js";
@@ -289,7 +289,7 @@ export async function runReplyAgent(params: {
       return false;
     }
     const prevSessionId = cleanupTranscripts ? prevEntry.sessionId : undefined;
-    const nextSessionId = crypto.randomUUID();
+    const nextSessionId = generateSecureUuid();
     const nextEntry: SessionEntry = {
       ...prevEntry,
       sessionId: nextSessionId,

src/infra/outbound/delivery-queue.ts

@@ -1,9 +1,9 @@
-import crypto from "node:crypto";
 import fs from "node:fs";
 import path from "node:path";
 import type { ReplyPayload } from "../../auto-reply/types.js";
 import type { OpenClawConfig } from "../../config/config.js";
 import { resolveStateDir } from "../../config/paths.js";
+import { generateSecureUuid } from "../secure-random.js";
 import type { OutboundChannel } from "./targets.js";
 
 const QUEUE_DIRNAME = "delivery-queue";
@@ -83,7 +83,7 @@ export async function enqueueDelivery(
   stateDir?: string,
 ): Promise<string> {
   const queueDir = await ensureQueueDir(stateDir);
-  const id = crypto.randomUUID();
+  const id = generateSecureUuid();
   const entry: QueuedDelivery = {
     id,
     enqueuedAt: Date.now(),

src/infra/secure-random.test.ts

@@ -0,0 +1,20 @@
+import { describe, expect, it } from "vitest";
+import { generateSecureToken, generateSecureUuid } from "./secure-random.js";
+
+describe("secure-random", () => {
+  it("generates UUIDs", () => {
+    const first = generateSecureUuid();
+    const second = generateSecureUuid();
+    expect(first).not.toBe(second);
+    expect(first).toMatch(
+      /^[0-9a-f]{8}-[0-9a-f]{4}-[1-5][0-9a-f]{3}-[89ab][0-9a-f]{3}-[0-9a-f]{12}$/i,
+    );
+  });
+
+  it("generates url-safe tokens", () => {
+    const defaultToken = generateSecureToken();
+    const token18 = generateSecureToken(18);
+    expect(defaultToken).toMatch(/^[A-Za-z0-9_-]+$/);
+    expect(token18).toMatch(/^[A-Za-z0-9_-]{24}$/);
+  });
+});

src/infra/secure-random.ts

@@ -0,0 +1,9 @@
+import { randomBytes, randomUUID } from "node:crypto";
+
+export function generateSecureUuid(): string {
+  return randomUUID();
+}
+
+export function generateSecureToken(bytes = 16): string {
+  return randomBytes(bytes).toString("base64url");
+}

src/slack/monitor/slash.test.ts

@@ -504,9 +504,10 @@ describe("Slack native command argument menus", () => {
     const element = actions?.elements?.[0];
     expect(element?.type).toBe("external_select");
     expect(element?.action_id).toBe("openclaw_cmdarg");
-    expect(payload.blocks?.find((block) => block.type === "actions")?.block_id).toContain(
-      "openclaw_cmdarg_ext:",
-    );
+    const blockId = payload.blocks?.find((block) => block.type === "actions")?.block_id;
+    expect(blockId).toContain("openclaw_cmdarg_ext:");
+    const token = (blockId ?? "").slice("openclaw_cmdarg_ext:".length);
+    expect(token).toMatch(/^[A-Za-z0-9_-]{24}$/);
   });
 
   it("serves filtered options for external_select menus", async () => {
@@ -536,6 +537,28 @@ describe("Slack native command argument menus", () => {
     expect(optionTexts.some((text) => text.includes("Period 12"))).toBe(true);
   });
 
+  it("rejects external_select option requests without user identity", async () => {
+    const { respond } = await runCommandHandler(reportExternalHandler);
+
+    const payload = respond.mock.calls[0]?.[0] as {
+      blocks?: Array<{ type: string; block_id?: string }>;
+    };
+    const blockId = payload.blocks?.find((block) => block.type === "actions")?.block_id;
+    expect(blockId).toContain("openclaw_cmdarg_ext:");
+
+    const ackOptions = vi.fn().mockResolvedValue(undefined);
+    await argMenuOptionsHandler({
+      ack: ackOptions,
+      body: {
+        value: "period 1",
+        actions: [{ block_id: blockId }],
+      },
+    });
+
+    expect(ackOptions).toHaveBeenCalledTimes(1);
+    expect(ackOptions).toHaveBeenCalledWith({ options: [] });
+  });
+
   it("rejects menu clicks from other users", async () => {
     const respond = await runArgMenuAction(argMenuHandler, {
       action: {

src/slack/monitor/slash.ts

@@ -5,6 +5,7 @@ import { formatAllowlistMatchMeta } from "../../channels/allowlist-match.js";
 import { resolveCommandAuthorizedFromAuthorizers } from "../../channels/command-gating.js";
 import { resolveNativeCommandsEnabled, resolveNativeSkillsEnabled } from "../../config/commands.js";
 import { danger, logVerbose } from "../../globals.js";
+import { generateSecureToken } from "../../infra/secure-random.js";
 import { buildPairingReply } from "../../pairing/pairing-messages.js";
 import {
   readChannelAllowFromStore,
@@ -37,6 +38,7 @@ const SLACK_COMMAND_ARG_SELECT_OPTIONS_MAX = 100;
 const SLACK_COMMAND_ARG_SELECT_OPTION_VALUE_MAX = 75;
 const SLACK_COMMAND_ARG_EXTERNAL_PREFIX = "openclaw_cmdarg_ext:";
 const SLACK_COMMAND_ARG_EXTERNAL_TTL_MS = 10 * 60 * 1000;
+const SLACK_COMMAND_ARG_EXTERNAL_TOKEN_PATTERN = /^[A-Za-z0-9_-]{24}$/;
 const SLACK_HEADER_TEXT_MAX = 150;
 
 type EncodedMenuChoice = { label: string; value: string };
@@ -78,12 +80,21 @@ function pruneSlackExternalArgMenuStore(now = Date.now()) {
   }
 }
 
+function createSlackExternalArgMenuToken(): string {
+  // 18 bytes -> 24 base64url chars; loop avoids replacing an existing live token.
+  let token = "";
+  do {
+    token = generateSecureToken(18);
+  } while (slackExternalArgMenuStore.has(token));
+  return token;
+}
+
 function storeSlackExternalArgMenu(params: {
   choices: EncodedMenuChoice[];
   userId: string;
 }): string {
   pruneSlackExternalArgMenuStore();
-  const token = `${Date.now().toString(36)}${Math.random().toString(36).slice(2, 10)}`;
+  const token = createSlackExternalArgMenuToken();
   slackExternalArgMenuStore.set(token, {
     choices: params.choices,
     userId: params.userId,
@@ -97,7 +108,7 @@ function readSlackExternalArgMenuToken(raw: unknown): string | undefined {
     return undefined;
   }
   const token = raw.slice(SLACK_COMMAND_ARG_EXTERNAL_PREFIX.length).trim();
-  return token.length > 0 ? token : undefined;
+  return SLACK_COMMAND_ARG_EXTERNAL_TOKEN_PATTERN.test(token) ? token : undefined;
 }
 
 type CommandsRegistry = typeof import("../../auto-reply/commands-registry.js");
@@ -783,7 +794,8 @@ export async function registerSlackMonitorSlashCommands(params: {
         await ack({ options: [] });
         return;
       }
-      if (typedBody.user?.id && typedBody.user.id !== entry.userId) {
+      const requesterUserId = typedBody.user?.id?.trim();
+      if (!requesterUserId || requesterUserId !== entry.userId) {
         await ack({ options: [] });
         return;
       }
@@ -860,7 +872,7 @@ export async function registerSlackMonitorSlashCommands(params: {
         user_name: userName,
         channel_id: body.channel?.id ?? "",
         channel_name: body.channel?.name ?? body.channel?.id ?? "",
-        trigger_id: triggerId ?? String(Date.now()),
+        trigger_id: triggerId,
       } as SlackCommandMiddlewareArgs["command"];
       await handleSlashCommand({
         command: commandPayload,