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CVE-2016-1000339

5.3 · MEDIUM

In the Bouncy Castle JCE Provider version 1.55 and earlier the primary engine class used for AES was AESFastEngine.

Published Jun 4, 2018CWE-310EPSS 2.71%

Overview

CVE-2016-1000339 is a medium-severity vulnerability. It was published on June 4, 2018 and has a CVSS 3.0 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.0 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

In the Bouncy Castle JCE Provider version 1.55 and earlier the primary engine class used for AES was AESFastEngine. Due to the highly table driven approach used in the algorithm it turns out that if the data channel on the CPU can be monitored the lookup table accesses are sufficient to leak information on the AES key being used. There was also a leak in AESEngine although it was substantially less. AESEngine has been modified to remove any signs of leakage (testing carried out on Intel X86-64) and is now the primary AES class for the BC JCE provider from 1.56. Use of AESFastEngine is now only recommended where otherwise deemed appropriate.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

Refaccess.redhat.com/errata/RHSA-2018:2669Refaccess.redhat.com/errata/RHSA-2018:2927GitHubgithub.com/bcgit/bc-java/commit/413b42f4d770456508585c830cfcde95f9b0e93b#diff-54656f860db94b867ba7542430cd2ef0GitHubgithub.com/bcgit/bc-java/commit/8a73f08931450c17c749af067b6a8185abdfd2c0#diff-494fb066bed02aeb76b6c005632943f2Reflists.debian.org/debian-lts-announce/2018/07/msg00009.htmlRefsecurity.netapp.com/advisory/ntap-20181127-0004/Refusn.ubuntu.com/3727-1/Refwww.oracle.com/security-alerts/cpuoct2020.htmlRefaccess.redhat.com/errata/RHSA-2018:2669Refaccess.redhat.com/errata/RHSA-2018:2927

How CyberStrike helps

Frequently asked questions

What is CVE-2016-1000339?

CVE-2016-1000339 is a medium-severity vulnerability. It was published on June 4, 2018 and has a CVSS 3.0 base score of 5.3 (MEDIUM).

How severe is CVE-2016-1000339?

This vulnerability has a CVSS 3.0 base score of 5.3, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2016-1000339?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2016-1000339?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2016-1000339 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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