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fix(server): validate filename and emoji name to improve security

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This commit is contained in:
syuilo 2023-02-05 14:25:37 +09:00
parent f599337320
commit 0d7256678e
2 changed files with 9 additions and 1 deletions
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6
packages/backend/src/queue/processors/ExportCustomEmojisProcessorService.ts
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@ -12,9 +12,9 @@ import type Logger from '@/logger.js';
import { DriveService } from '@/core/DriveService.js'; import { DriveService } from '@/core/DriveService.js';
import { createTemp, createTempDir } from '@/misc/create-temp.js'; import { createTemp, createTempDir } from '@/misc/create-temp.js';
import { DownloadService } from '@/core/DownloadService.js'; import { DownloadService } from '@/core/DownloadService.js';
import { bindThis } from '@/decorators.js';
import { QueueLoggerService } from '../QueueLoggerService.js'; import { QueueLoggerService } from '../QueueLoggerService.js';
import type Bull from 'bull'; import type Bull from 'bull';
import { bindThis } from '@/decorators.js';
@Injectable() @Injectable()
export class ExportCustomEmojisProcessorService { export class ExportCustomEmojisProcessorService {
@ -82,6 +82,10 @@ export class ExportCustomEmojisProcessorService {
}); });
for (const emoji of customEmojis) { for (const emoji of customEmojis) {
if (!/^[a-zA-Z0-9_]+$/.test(emoji.name)) {
this.logger.error(`invalid emoji name: ${emoji.name}`);
continue;
}
const ext = mime.extension(emoji.type ?? 'image/png'); const ext = mime.extension(emoji.type ?? 'image/png');
const fileName = emoji.name + (ext ? '.' + ext : ''); const fileName = emoji.name + (ext ? '.' + ext : '');
const emojiPath = path + '/' + fileName; const emojiPath = path + '/' + fileName;

4
packages/backend/src/queue/processors/ImportCustomEmojisProcessorService.ts
View file

@ -81,6 +81,10 @@ export class ImportCustomEmojisProcessorService {
for (const record of meta.emojis) { for (const record of meta.emojis) {
if (!record.downloaded) continue; if (!record.downloaded) continue;
if (!/^[a-zA-Z0-9_]+?([a-zA-Z0-9\.]+)?$/.test(record.fileName)) {
this.logger.error(`invalid filename: ${record.fileName}`);
continue;
}
const emojiInfo = record.emoji; const emojiInfo = record.emoji;
const emojiPath = outputPath + '/' + record.fileName; const emojiPath = outputPath + '/' + record.fileName;
await this.emojisRepository.delete({ await this.emojisRepository.delete({