Horizon Alert
Summary of the vulnerability and why it matters
A security issue has been identified in the FasterXML jackson-databind library, which is commonly used in applications that process JSON data. This vulnerability could potentially allow an attacker to execute malicious code if specific conditions are met, including the presence of certain database connection components and an exposed RMI service. The primary concern is to confirm if your environment utilizes this library in a way that could be exposed to such an attack.
- A library used for handling data could be exploited.
- This impacts systems processing external JSON.
- Confirm relevance and confirm if systems are exposed.
Attack Path
How an attacker could exploit the issue
An attacker could exploit this vulnerability by sending specially crafted JSON data to a service that uses the Jackson data-binding library with default typing enabled. If the service also has the `commons-dbcp` library in its classpath and an RMI service endpoint is accessible, the attacker can manipulate the data to execute arbitrary code on the server.
- Network access to a JSON endpoint.
- Sending malicious JSON data.
- Remote code execution.
Live Threat
Current exploitation, exposure, and threat context
When Default Typing is enabled for an externally exposed JSON endpoint and the `commons-dbcp` jar is present in the classpath, an attacker could exploit this vulnerability by finding an RMI service endpoint to access, potentially leading to the execution of malicious code. This occurs due to mishandling within `org.apache.commons.dbcp.datasources.SharedPoolDataSource` and `org.apache.commons.dbcp.datasources.PerUserPoolDataSource`.
- Service code execution could occur.
- Malicious RMI service endpoint access.
- Compromised service integrity and availability.
Operational Fix
Recommended remediation, mitigation, and detection steps
Application owners and platform teams are likely responsible for managing this risk, given that the vulnerability lies within the widely adopted jackson-databind library, often integrated into externally facing JSON endpoints. The critical first step is to identify all instances of the affected technology, assess their exposure and business criticality, and locate the accountable owner to plan a risk-based remediation.
- Identify affected systems and owners.
- Verify Default Typing and RMI exposure.
- Plan remediation or implement controls.
