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This vulnerability exists within the GeoJSON binary protocol encoding mechanism for Polygon and MultiPolygon geometries in the database connector. When an application passes user-influenced parameters containing specially crafted coordinate structures, a discrepancy arises between the buffer sizing loop and the actual data writing loop. Specifically, non-array rings carrying explicit numeric length properties trick the allocation logic into reserving memory space based on that length, but the writing loop skips them entirely because they are not valid arrays. Because the internal buffer is allocated via Buffer.allocUnsafe() and returned completely regardless of advanced write positions, the unwritten allocated bytes contain raw uninitialized Node.js process heap memory. Attackers can exploit this behavior by passing malicious payloads that silently inject sensitive data—such as neighboring request bodies, session tokens, cookies, database credentials, or TLS keys—into stored database rows and subsequent backups without triggering application errors.
DailyCVE Form:
Platform: Node.js Connector
Version: All prior versions
Vulnerability : Memory Disclosure
Severity: Critical
date: 2024-11-15
Prediction: 2024-11-20
What Undercode Say
This vulnerability highlights a dangerous pattern in manual buffer management where allocation size calculation logic diverges from validation checks in processing loops. Developers must always ensure that memory reservation and writing routines validate data types identically, preventing unwritten memory regions from being exposed via unsafe allocation functions like Buffer.allocUnsafe().
Bash Commands and Codes
npm install database-connector@latest
node -e 'const connector = require("connector"); console.log("Checking secure connector version...");'
// Malformed GeoJSON payload example triggering uninitialized memory reservation
const maliciousPayload = {
type: "Polygon",
coordinates: [{"length": 4000}]
};
connector.execute("INSERT INTO locations (geo) VALUES (?)", [bash]);
Exploit: (Educational Purposes!)
Attackers leverage this flaw by sending malformed GeoJSON objects containing non-array ring structures with length indicators to endpoints handling map or location features. Since the encoder reserves buffer space for these fake elements without writing actual coordinate data, the uninitialized contents of the shared Node.js heap are swept into the allocated buffer chunk. This chunk is then written directly to the database column during standard query execution, allowing unauthorized users who read the table rows or database backups to harvest sensitive tokens, credentials, and session data leaked from concurrent operations in the shared process memory space.
Protection
Upgrade your database connector package immediately to the latest patched version where Polygon and MultiPolygon encoders strictly reject non-array rings prior to buffer allocation. As a temporary workaround until an upgrade can be performed, implement strict input validation routines in your application code to guarantee that all GeoJSON coordinate properties are properly nested arrays of numbers, or switch entirely to text-based query execution methods which bypass binary buffer allocation.
Impact
Successful exploitation leads to the silent disclosure of highly sensitive process memory contents, compromising data confidentiality across a shared Node.js runtime environment. Exposed secrets include other users’ request and response payloads, active session tokens, authentication cookies, database connection strings, and critical TLS key material. Furthermore, this leaked data is permanently persisted into database records, replicas, and backup archives, enabling offline extraction by any actor with read access to the affected database tables.
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Sources:
Reported By: github.com
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