medium
6.5
CWE
20
Advisory Published
CVE Published
Updated

CVE-2020-1960: Input Validation

First published: Wed May 13 2020(Updated: )

A vulnerability in Apache Flink (1.1.0 to 1.1.5, 1.2.0 to 1.2.1, 1.3.0 to 1.3.3, 1.4.0 to 1.4.2, 1.5.0 to 1.5.6, 1.6.0 to 1.6.4, 1.7.0 to 1.7.2, 1.8.0 to 1.8.3, 1.9.0 to 1.9.2, 1.10.0) where, when running a process with an enabled JMXReporter, with a port configured via metrics.reporter.reporter_name&gt;.port, an attacker with local access to the machine and JMX port can execute a man-in-the-middle attack using a specially crafted request to rebind the JMXRMI registry to one under the attacker's control. This compromises any connection established to the process via JMX, allowing extraction of credentials and any other transferred data. Reference: <a href="https://lists.apache.org/thread.html/r23e559dee1e69741557b5fe431846de1f1a5981356d0ddb9482df88a%40%3Cdev.flink.apache.org%3E">https://lists.apache.org/thread.html/r23e559dee1e69741557b5fe431846de1f1a5981356d0ddb9482df88a%40%3Cdev.flink.apache.org%3E</a>

Credit: security@apache.org

Affected SoftwareAffected VersionHow to fix
Apache Flink>=1.1.0<=1.1.5
Apache Flink>=1.2.0<=1.2.1
Apache Flink>=1.3.0<=1.3.3
Apache Flink>=1.4.0<=1.4.2
Apache Flink>=1.5.0<=1.5.6
Apache Flink>=1.6.0<=1.6.4
Apache Flink>=1.8.0<=1.8.3
Apache Flink>=1.9.0<=1.9.2
Apache Flink=1.10.0

Remedy

https://lists.apache.org/thread.html/r23e559dee1e69741557b5fe431846de1f1a5981356d0ddb9482df88a%40%3Cdev.flink.apache.org%3E

Remedy

https://lists.apache.org/thread.html/r28f17e564950d663e68cc6fe75756012dda62ac623766bb9bc5e7034@%3Cissues.flink.apache.org%3E

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Reference Links

Parent vulnerabilities

(Appears in the following advisories)

Frequently Asked Questions

  • What is the severity of CVE-2020-1960?

    CVE-2020-1960 is classified as a moderate severity vulnerability.

  • Which versions of Apache Flink are affected by CVE-2020-1960?

    CVE-2020-1960 affects Apache Flink versions from 1.1.0 through 1.10.0, including various specific subversions.

  • How do I fix CVE-2020-1960?

    To fix CVE-2020-1960, upgrade Apache Flink to a version that is not affected, specifically above 1.10.0.

  • What type of vulnerability is CVE-2020-1960?

    CVE-2020-1960 is a vulnerability associated with the JMXReporter in Apache Flink that can lead to unauthorized access.

  • Can CVE-2020-1960 be exploited remotely?

    Yes, CVE-2020-1960 can potentially be exploited remotely if JMX reporting is enabled on an exposed port.

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