fix(security): pass db backup/restore identifiers via env vars to avoid injection

The backup and restore command builders interpolated database name / user /
password directly into a 'docker exec ... {bash,sh} -c "..."' string executed
via execAsync / execAsyncRemote. Because the values sit inside the outer shell's
double quotes, a simple quote() is insufficient: the outer shell expands $(),
backticks and $VAR before the inner quoting applies (double-nested shell).

Values are now passed to the container as environment variables (docker exec -e
VAR=<shell-quoted>) and referenced as "$VAR" inside a single-quoted inner
script, so they never enter the inner command text and cannot break out of
either shell layer. The rest of each command (pg_dump/mysqldump/etc., flags,
| gzip) is unchanged.

Closes GHSA-qc73-mp78-4833, GHSA-qf8x-98cv-92qh, GHSA-ww4j-wjrr-rq8v, GHSA-7m3w-rm5f-h4fr, GHSA-f7mp-9jfp-mjrr

apps/dokploy/__test__/backups/db-backup-restore-injection.test.ts

@@ -0,0 +1,106 @@
+import { execSync } from "node:child_process";
+import { chmodSync, existsSync, rmSync, writeFileSync } from "node:fs";
+import {
+	getLibsqlBackupCommand,
+	getMariadbBackupCommand,
+	getMongoBackupCommand,
+	getMysqlBackupCommand,
+	getPostgresBackupCommand,
+} from "@dokploy/server/utils/backups/utils";
+import {
+	getMariadbRestoreCommand,
+	getMongoRestoreCommand,
+	getMysqlRestoreCommand,
+	getPostgresRestoreCommand,
+} from "@dokploy/server/utils/restore/utils";
+import { afterAll, beforeAll, describe, expect, it } from "vitest";
+
+// A stub replacing the real `docker` binary. It ignores exec/-i/$CONTAINER_ID,
+// exports the -e VAR=val pairs, and runs the inner `sh -c <script>` — so the
+// test exercises BOTH shell layers (outer /bin/sh building the docker command,
+// and the inner shell) the way production does, without needing a container.
+const stub = `/tmp/docker_stub_${process.pid}`;
+const MARK = `/tmp/dokploy_dbbk_pwned_${process.pid}`;
+
+beforeAll(() => {
+	writeFileSync(
+		stub,
+		`#!/bin/bash
+shift # exec
+envs=()
+while [ "$1" = "-e" ]; do envs+=("$2"); shift 2; done
+shift 2 # -i CONTAINER
+shell="$1"; shift # bash|sh
+shift # -c
+env "\${envs[@]}" "$shell" -c "$1" </dev/null 2>/dev/null || true
+`,
+	);
+	chmodSync(stub, 0o755);
+});
+
+afterAll(() => {
+	if (existsSync(stub)) rmSync(stub);
+	if (existsSync(MARK)) rmSync(MARK);
+});
+
+// Run a builder-produced command with `docker` pointed at the stub; return true
+// if no injected command fired.
+const runsSafely = (command: string) => {
+	if (existsSync(MARK)) rmSync(MARK);
+	const withStub = command.replace(/^docker /, `${stub} `);
+	try {
+		execSync(withStub, {
+			shell: "/bin/bash",
+			stdio: "ignore",
+			env: { ...process.env, CONTAINER_ID: "test" },
+		});
+	} catch {}
+	const fired = existsSync(MARK);
+	if (existsSync(MARK)) rmSync(MARK);
+	return !fired;
+};
+
+// Payloads that try to break out of every quoting style used in the builders.
+const p = (mark: string) => [
+	`$(touch ${mark})`,
+	"`touch " + mark + "`",
+	`x'; touch ${mark}; '`,
+	`x"; touch ${mark}; echo "`,
+	`x; touch ${mark}`,
+];
+
+describe("database backup/restore command injection", () => {
+	const cases: Array<[string, (v: string) => string]> = [
+		["postgres backup (database)", (v) => getPostgresBackupCommand(v, "u")],
+		["postgres backup (user)", (v) => getPostgresBackupCommand("db", v)],
+		["mariadb backup (password)", (v) => getMariadbBackupCommand("db", "u", v)],
+		["mysql backup (database)", (v) => getMysqlBackupCommand(v, "pw")],
+		["mongo backup (user)", (v) => getMongoBackupCommand("db", v, "pw")],
+		["libsql backup (database)", (v) => getLibsqlBackupCommand(v)],
+		["postgres restore (database)", (v) => getPostgresRestoreCommand(v, "u")],
+		[
+			"mariadb restore (password)",
+			(v) => getMariadbRestoreCommand("db", "u", v),
+		],
+		["mysql restore (database)", (v) => getMysqlRestoreCommand(v, "pw")],
+		["mongo restore (user)", (v) => getMongoRestoreCommand("db", v, "pw")],
+	];
+
+	for (const [label, build] of cases) {
+		it(`${label} is not injectable`, () => {
+			for (const payload of p(MARK)) {
+				expect(runsSafely(build(payload))).toBe(true);
+			}
+		});
+	}
+
+	it("preserves a legitimate database name (passed through as env var)", () => {
+		const cmd = getPostgresBackupCommand("my-db_prod", "app_user");
+		// Values live in -e assignments, never inline in the pg_dump text.
+		expect(cmd).toContain("-e DB_NAME=my-db_prod");
+		expect(cmd).toContain("-e DB_USER=app_user");
+		expect(cmd).toContain(
+			'pg_dump -Fc --no-acl --no-owner -h localhost -U "$DB_USER"',
+		);
+	});
+});