CVE-2019-11775 : What You Need to Know

A bug in Eclipse OpenJ9 versions prior to 0.15 can lead to issues like reading out of array bounds due to a failure in privatizing a value extracted from a loop during versioning.

Understanding CVE-2019-11775

This CVE involves a bug in Eclipse OpenJ9 versions before 0.15 that affects the privatization of values extracted from loops during versioning.

What is CVE-2019-11775?

In Eclipse OpenJ9 versions prior to 0.15, a bug in the loop versioner can cause a failure to privatize a value extracted from the loop during versioning. This occurs when a condition is moved out of the loop, leading to the value of a field not being privatized in the modified loop copy. The consequence is that the test may detect one value of the field, while the loop encounters a modified field value without retesting the condition moved outside the loop. Various issues can arise from this bug, with reading out of array bounds being a significant consequence.

The Impact of CVE-2019-11775

The vulnerability can result in reading out of array bounds and potentially lead to other critical issues within affected systems.

Technical Details of CVE-2019-11775

This section provides detailed technical information about CVE-2019-11775.

Vulnerability Description

The bug in Eclipse OpenJ9 versions prior to 0.15 causes the loop versioner to fail to privatize a value extracted from the loop during versioning, potentially leading to various issues, including reading out of array bounds.

Affected Systems and Versions

Affected Product: Eclipse OpenJ9
Vendor: The Eclipse Foundation
Affected Versions: All versions prior to 0.15

Exploitation Mechanism

The exploitation of this vulnerability involves manipulating conditions moved out of loops to expose modified field values without proper retesting, leading to potential security risks.

Mitigation and Prevention

Protecting systems from CVE-2019-11775 requires immediate steps and long-term security practices.

Immediate Steps to Take

Update Eclipse OpenJ9 to version 0.15 or newer to mitigate the vulnerability.
Monitor for any unusual activities that could indicate exploitation of the bug.

Long-Term Security Practices

Regularly update software and apply patches to address known vulnerabilities.
Conduct security audits and code reviews to identify and fix potential issues.

Patching and Updates

Apply patches provided by Eclipse Foundation to fix the bug and prevent exploitation.