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CVE-2016-1000339

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Date: June 4, 2018

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.

Language: Java

Severity Score

Severity Score

Weakness Type (CWE)

Cryptographic Issues

CWE-310

Top Fix

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Upgrade Version

Upgrade to version org.bouncycastle:bcprov-debug-jdk15on:1.56,org.bouncycastle:bcprov-debug-jdk14:1.56,org.bouncycastle:bcprov-ext-jdk14:1.56,org.bouncycastle:bcprov-ext-jdk15on:1.56,org.bouncycastle:bcprov-jdk14:1.56,org.bouncycastle:bcprov-jdk15on:1.56,org.bouncycastle:bcprov-ext-debug-jdk15on:1.56

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CVSS v3.1

Base Score:
Attack Vector (AV): NETWORK
Attack Complexity (AC): LOW
Privileges Required (PR): NONE
User Interaction (UI): NONE
Scope (S): UNCHANGED
Confidentiality (C): LOW
Integrity (I): NONE
Availability (A): NONE

CVSS v2

Base Score:
Access Vector (AV): NETWORK
Access Complexity (AC): LOW
Authentication (AU): NONE
Confidentiality (C): PARTIAL
Integrity (I): NONE
Availability (A): NONE
Additional information:

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