Timing Attack Affecting org.graalvm.sdk:graal-sdk package, versions [,20.3.4) [21.0.0,21.3.0)

  • Attack Complexity


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  • snyk-id


  • published

    21 Oct 2021

  • disclosed

    19 Oct 2021

  • credit

    Artem Smotrakov

How to fix?

Upgrade org.graalvm.sdk:graal-sdk to version 20.3.4, 21.3.0 or higher.


org.graalvm.sdk:graal-sdk is a high-performance JDK distribution designed to accelerate the execution of applications written in Java and other JVM languages along with support for JavaScript, Ruby, Python, and a number of other popular languages.

Affected versions of this package are vulnerable to Timing Attack. It was discovered that the TLS implementation in the JSSE component of OpenJDK used non-constant comparisons when checking various data (such as session identifiers or verification data blocks) during TLS handshakes. A malicious TLS client could possibly use this flaw to recover that data by observing timing differences in processing of various inputs.