Description

DbGate: Zip Slip in archive/unzip allows arbitrary file write leading to RCE The unzipDirectory() function in packages/api/src/shell/unzipDirectory.js (line 27) does not validate that extracted file paths stay within the output directory. A malicious ZIP with ../ entries writes files anywhere on the filesystem.

In the default Docker deployment, DbGate runs as root and the none auth provider issues JWT tokens without credentials via POST /auth/login, so this is exploitable by any network-adjacent attacker.

Affected code:

packages/api/src/shell/unzipDirectory.js, line 27:

const destPath = path.join(outputDirectory, entry.fileName);
// No check that destPath stays within outputDirectory

Called from packages/api/src/controllers/archive.js, lines 291-293:

async unzip({ folder }) {
    const newFolder = await this.getNewArchiveFolder({ database: folder.slice(0, -4) });
    await unzipDirectory(path.join(archivedir(), folder), path.join(archivedir(), newFolder));

The archive controller also has zero permission checks and zero path traversal protection on any of its endpoints.

PoC:

import requests, zipfile, io

TARGET = "http://localhost:3000"

# Get auth token (no credentials needed in default Docker)
r = requests.post(f"{TARGET}/api/auth/login", json={"amoid": "none"})
token = r.json()["accessToken"]
hdrs = {"Authorization": f"Bearer {token}"}...
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Impact: Arbitrary file write as root -> RCE. Full container compromise in Docker deployments.

Mitigation

Aliases

References