CVE-2019-17639: eclipse openj9 Type Confusion

Vulnerability summary

CVE-2019-17639 is a medium (CVSS 5.3) Type Confusion vulnerability in eclipse openj9. EPSS estimates a 1.50% chance of exploitation in the next 30 days, higher than 73.9% of scored vulnerabilities.

Timeline

1. 15-07-2020
   PublishedVulnerability first disclosed.
2. 05-08-2024
   Last modifiedVulnerability information updated.

Description

In Eclipse OpenJ9 prior to version 0.21 on Power platforms, calling the System.arraycopy method with a length longer than the length of the source or destination array can, in certain specially crafted code patterns, cause the current method to return prematurely with an undefined return value. This allows whatever value happens to be in the return register at that time to be used as if it matches the method's declared return type.

• CWE-843Access of Resource Using Incompatible Type ('Type Confusion')The product allocates or initializes a resource such as a pointer, object, or variable using one type, but it later accesses that resource using a type that is incompatible with the original type.