Horizon Alert
Summary of the vulnerability and why it matters
This advisory concerns a critical vulnerability in IBM WebSphere Extreme Scale, a component often used for data grids and caching in enterprise applications. The vulnerability could allow an authenticated attacker to execute arbitrary code on the server. The main concern is confirming the relevance and exposure of this technology within our environment.
- Allows code execution via crafted queries.
- Impacts core enterprise data services.
- Confirm relevance and assess exposure.
Attack Path
How an attacker could exploit the issue
An attacker who can influence an application-built Object Query Language (OQL) query string in IBM WebSphere Extreme Scale could potentially execute arbitrary code on the server. This is possible because the OQL engine resolves and instantiates attacker-supplied class names without restrictions. A specific variant of this attack, involving `SELECT DISTINCT` and planted grid values, can trigger a similar outcome after deserialization, even when serialization filters are in place, and can propagate across grid nodes.
- Authenticated attacker influences OQL query.
- Attacker-supplied class names are instantiated.
- Arbitrary constructor execution on JVM.
Live Threat
Current exploitation, exposure, and threat context
An authenticated attacker could exploit the Object Query Language engine in IBM WebSphere Extreme Scale to execute arbitrary constructors on the Java Virtual Machine (JVM). This could occur when the attacker can influence an application-built OQL query string or use a `SELECT DISTINCT` variant with planted grid values, potentially leading to a compromise of the service's behavior.
- Arbitrary code execution on the JVM.
- Influencing OQL queries or using planted grid values.
- Compromise of service behavior.
Operational Fix
Recommended remediation, mitigation, and detection steps
This vulnerability in IBM WebSphere Extreme Scale's Object Query Language engine impacts applications using this technology, likely requiring collaboration between application owners, platform teams, and security teams. The immediate first step is to inventory where WebSphere Extreme Scale is deployed, assess its exposure and criticality, and identify the accountable teams to plan remediation based on risk.
- Application owners and platform teams should own.
- Verify deployed instances and exposure.
- Plan remediation based on risk assessment.
