Horizon Alert
Summary of the vulnerability and why it matters
A validation flaw in the MongoDB Node.js driver's DNS SRV host discovery may allow an attacker to redirect connections outside the intended domain, potentially exposing application data and credentials. This issue affects applications using `mongodb+srv://` connection strings, while `mongodb://` strings are unaffected.
- Driver connects to wrong hosts.
- Data exposure and credential compromise possible.
- Confirm relevance and assess exposure.
Attack Path
How an attacker could exploit the issue
An attacker with the ability to manipulate DNS SRV responses can redirect a Node.js application's connection to a MongoDB instance to a server of their choosing. This occurs because the MongoDB Node.js driver incorrectly handles hostnames in the DNS SRV response, potentially leading to the disclosure of sensitive application data, authentication credentials, or the alteration of query results. Applications using `mongodb://` connection strings are not affected.
- Attacker can manipulate DNS SRV responses.
- Driver connects to an unexpected host.
- Risk of data disclosure and altered results.
Live Threat
Current exploitation, exposure, and threat context
A validation flaw in the MongoDB Node.js driver's DNS SRV host discovery could allow an unauthenticated attacker to redirect connections to an unintended host. This could lead to the unintended disclosure of application data and authentication credentials, as well as altered query results, when using `mongodb+srv://` connection strings and when the attacker can forge DNS SRV responses.
- Application data and credentials at risk.
- Attacker spoofs DNS SRV responses.
- Unintended data disclosure and altered results.
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability in the MongoDB Node.js driver impacts applications using `mongodb+srv://` connection strings. Application owners are likely responsible for ensuring their code and dependencies are updated, while infrastructure and security teams should verify the reachability and business criticality of affected applications. The first practical step is to identify all applications using the affected driver, confirm their exposure and importance, and then plan for remediation by coordinating with application owners and potentially the MongoDB vendor.
- Application owners should manage the fix.
- Verify affected `mongodb+srv://` connections.
- Plan remediation with vendor coordination.
