Bug 1730078 (CVE-2019-2818)

Summary: CVE-2019-2818 OpenJDK: Non-constant time comparison in ChaCha20Cipher (Security, 8221344)
Product: [Other] Security Response Reporter: Tomas Hoger <thoger>
Component: vulnerabilityAssignee: Red Hat Product Security <security-response-team>
Status: CLOSED ERRATA QA Contact:
Severity: low Docs Contact:
Priority: low    
Version: unspecifiedCC: ahughes, dbhole, fferrari, jvanek, khosford, mtorre, rhel-process-autobot, security-response-team, tfitzsim, watson-tool-maintainers
Target Milestone: ---Keywords: Security
Target Release: ---   
Hardware: All   
OS: Linux   
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Last Closed: 2019-08-07 12:39:42 UTC Type: ---
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
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Bug Depends On: 1724467, 1724468, 1724469, 1724470, 1731479    
Bug Blocks: 1724463    

Description Tomas Hoger 2019-07-15 18:54:35 UTC 
It was discovered that the ChaCha20Cipher implementation in the Security component of OpenJDK used non-constant time comparison for comparing tags.  A remote attacker could possible use the flaw to leak information about decryption state using the timing information.
Comment 1 Tomas Hoger 2019-07-16 20:59:24 UTC 
Public now via Oracle CPU July 2019:

https://www.oracle.com/technetwork/security-advisory/cpujul2019-5072835.html#AppendixJAVA

Fixed in Oracle Java SE 12.0.2 and 11.0.4.
Comment 2 errata-xmlrpc 2019-07-22 12:40:01 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 8

Via RHSA-2019:1817 https://access.redhat.com/errata/RHSA-2019:1817
Comment 3 errata-xmlrpc 2019-07-22 12:40:21 UTC 
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2019:1810 https://access.redhat.com/errata/RHSA-2019:1810
Comment 4 Tomas Hoger 2019-10-02 08:47:34 UTC 
OpenJDK-11 upstream commit:
http://hg.openjdk.java.net/jdk-updates/jdk11u/rev/7f92fc4cdf02