Description

An application using the MongoDB BI Connector ODBC Driver may experience a memory-safety issue when processing output parameters from a stored procedure. Triggering this issue requires connecting to an untrusted or impersonated database server that returns crafted metadata. This may result in process termination, disclosure of process memory, or, under certain conditions, arbitrary code execution.

Executive Summary

Technical Details

Mitigations

References

Additional Metadata

{
  "score": "8.1",
  "pubDate": "2026-08-12T21:17:37.577Z",
  "pubdate": "2026-08-12T21:17:37.577Z",
  "executiveSummary": "A memory-safety vulnerability exists within the MongoDB BI Connector ODBC Driver when handling output parameters returned from stored procedures. This vulnerability arises during the parsing and processing of database-supplied metadata.\nSuccessful exploitation of this issue can lead to severe operational and security consequences, including application process termination resulting in a denial of service, unauthorized disclosure of sensitive process memory, or potentially the execution of arbitrary code within the context of the running application.\nThe affected product is applications utilizing the MongoDB BI Connector ODBC Driver. The primary risk implication is the potential compromise of system integrity and confidentiality if an application connects to a compromised or malicious database instance.\nTo trigger this vulnerability, specific exploitation requirements must be met. An attacker must successfully position an untrusted or impersonated database server capable of interacting with the vulnerable client.\nUpon establishing a connection, this malicious or rogue server must return specifically crafted metadata during the execution or processing of stored procedure output parameters. Consequently, the attacker's capability relies on either compromising an existing database endpoint or inducing the victim application to connect to a maliciously controlled server environment.",
  "technicalDetails": "The root cause of the vulnerability stems from inadequate bounds checking, improper input validation, or memory management flaws within the MongoDB BI Connector ODBC Driver when it processes incoming data structures and metadata associated with stored procedure output parameters.\nThe vulnerable component is the parsing engine responsible for handling result sets and parameter metadata within the ODBC driver codebase.\nThe attack flow begins when an application utilizing the MongoDB BI Connector ODBC Driver initiates a database connection and invokes a stored procedure. Instead of connecting to a legitimate database instance, the client connects to an untrusted, malicious, or impersonated database server controlled by an attacker.\nDuring the communication sequence, the malicious server responds with crafted metadata containing manipulated size descriptors, out-of-bounds offsets, or malformed data structures pertaining to the stored procedure's output parameters.\nAs the ODBC driver parses these crafted output parameters, the memory-safety violation is triggered. Depending on the exact nature of the memory corruption—such as a buffer overflow, heap corruption, or out-of-read condition—the operational impact manifests in different ways.\nIf the memory violation results in an unhandled exception or critical corruption, it leads to immediate process termination, causing a denial of service for the host application.\nIf the flaw permits reading past allocated memory boundaries, an attacker can achieve disclosure of process memory, potentially leaking sensitive information such as credentials, encryption keys, or internal application states.\nUnder advanced exploitation conditions, carefully crafted payloads may allow the manipulation of internal control flow structures, potentially leading to arbitrary code execution with the privileges of the application process utilizing the ODBC driver.\nNetwork exposure is inherent to database client-server communication channels where ODBC drivers are deployed. Authentication and privilege requirements depend on the application's configuration, but the exploitation vector fundamentally relies on the trustworthiness of the connected database server rather than pre-authenticated user privileges within a legitimate database."
}