Bug 1730078 (CVE-2019-2818) - CVE-2019-2818 OpenJDK: Non-constant time comparison in ChaCha20Cipher (Security, 8221344)
Summary: CVE-2019-2818 OpenJDK: Non-constant time comparison in ChaCha20Cipher (Securi...
Keywords:
Status: CLOSED ERRATA
Alias: CVE-2019-2818
Product: Security Response
Classification: Other
Component: vulnerability
Version: unspecified
Hardware: All
OS: Linux
low
low
Target Milestone: ---
Assignee: Red Hat Product Security
QA Contact:
URL:
Whiteboard:
Depends On: 1724467 1724468 1724469 1724470 1731479
Blocks: 1724463
TreeView+ depends on / blocked
 
Reported: 2019-07-15 18:54 UTC by Tomas Hoger
Modified: 2019-10-02 08:47 UTC (History)
4 users (show)

Fixed In Version:
Clone Of:
Environment:
Last Closed: 2019-08-07 12:39:42 UTC
Embargoed:

Attachments (Terms of Use)


Links
System ID Private Priority Status Summary Last Updated
Red Hat Product Errata RHSA-2019:1810 0 None None None 2019-07-22 12:40:22 UTC
Red Hat Product Errata RHSA-2019:1817 0 None None None 2019-07-22 12:40:01 UTC

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
Note You need to log in before you can comment on or make changes to this bug.