CVE-2018-2952

What it actually does

Race condition in the Concurrency subcomponent allows an unauthenticated network attacker to trigger partial denial of service by supplying data to affected Java APIs.

Why it matters to the business

Service availability can be degraded for Java-based applications and infrastructure components, potentially disrupting business operations until the affected Java runtimes are updated.

How an attack unfolds

An attacker with network access crafts and sends data to Java APIs or sandboxed applets/Web Start applications to trigger a timing-dependent race condition that results in partial DoS; no authentication or user interaction is required.

How to fix it

Upgrade affected Oracle Java SE, Java SE Embedded, and JRockit installations to versions later than those listed as vulnerable; apply the latest vendor security updates for all downstream products that bundle these Java components.

How to confirm the fix worked

Verify that running java -version reports a build newer than the affected releases (6u191, 7u181, 8u172, 10.0.1, 8u171, R28.3.18) and confirm the absence of the vulnerable concurrency code paths via vendor patch documentation or binary analysis.

Typical attack path

1. Obtain network access to a system running an affected Java SE/Embedded/JRockit version
2. Identify exposed Java APIs, web services, or sandboxed applets/Web Start entry points
3. Send specially timed or formatted requests to trigger the concurrency race condition
4. Observe partial denial-of-service impact on availability

How to detect it

Review application and system logs for repeated malformed requests targeting Java services around the time of availability incidents; correlate with Java process crashes or thread-dump anomalies indicative of concurrency failures.

What your security team should do

• Prioritize patching all internet-facing and internal Java runtimes to the latest supported releases
• Inventory Java deployments across servers, desktops, and embedded devices to identify exposure
• Monitor EPSS trend and reassess exploitation likelihood if new proof-of-concept code appears
• Apply compensating controls such as network segmentation while patches are deployed