GHSA-m734-r4g6-34f9 NoSQL Injection in loopback-connector-mongodb
Attackers can execute arbitrary JavaScript on the database via NoSQL injection in the LoopBack MongoDB connector, leading to code execution or denial of service.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- Available
What is GHSA-m734-r4g6-34f9?
GHSA-m734-r4g6-34f9 is a code injection vulnerability in loopback-connector-mongodb, published on 4 Jun 2019. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
Versions of loopback-connector-mongodb before 3.6.0 are vulnerable to NoSQL injection.
MongoDB Connector for LoopBack fails to properly sanitize a filter passed to query the database by allowing the dangerous $where property to be passed to the MongoDB Driver. The Driver allows the special $where property in a filter to execute JavaScript (client can pass in a malicious script) on the database Driver. This is an intended feature of MongoDB unless disabled (instructions here).
A proof of concept malicious query:
GET /POST filter={"where": {"$where": "function(){sleep(5000); return this.title.contains('Hello');}"}}
The above makes the database sleep for 5 seconds and then returns all “Posts” with the title containing the word Hello.
Recommendation
Update to version 3.6.0 or later.
Which versions are affected by GHSA-m734-r4g6-34f9?
2 open source packages ship an affected version, including loopback-connector-mongodb.
| Package | Affected | Fixed in |
|---|---|---|
loopback-connector-mongodb npm | All versions | 3.6.0 |
loopback-connector-mongodb npm | All versions | 3.6.0 |
How do I fix GHSA-m734-r4g6-34f9?
Upgrade loopback-connector-mongodb to 3.6.0 or later.
Upgrade, and never evaluate templates, expressions or code built from user input. More about Code injection.
Is GHSA-m734-r4g6-34f9 being exploited?
There is no known exploitation of GHSA-m734-r4g6-34f9 in the wild and no public exploit code.