Bug 1328022 - (CVE-2016-0695) CVE-2016-0695 OpenJDK: insufficient DSA key parameters checks (Security, 8138593)
CVE-2016-0695 OpenJDK: insufficient DSA key parameters checks (Security, 8138...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
low Severity low
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Assigned To: Red Hat Product Security
impact=low,public=20160419,reported=2...
: Security
Depends On:
Blocks: 1324915
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Reported: 2016-04-18 04:56 EDT by Tomas Hoger
Modified: 2016-05-09 10:41 EDT (History)
3 users (show)

See Also:
Fixed In Version:
Doc Type: Bug Fix
Doc Text:
It was discovered that the Security component in OpenJDK failed to check the digest algorithm strength when generating DSA signatures. The use of a digest weaker than the key strength could lead to the generation of signatures that were weaker than expected.
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Last Closed: 2016-05-09 10:41:25 EDT
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RHEL 7.3 requirements from Atomic Host:
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Description Tomas Hoger 2016-04-18 04:56:53 EDT
It was discovered that the Security component of OpenJDK failed to properly check DSA (Digital Signature Algorithm) parameters. The use of keys with incorrect parameters could lead to disclosure of sensitive data.
Comment 1 Tomas Hoger 2016-04-19 15:01:00 EDT
Related note in Oracle JDK release notes:

  DSA signature generation is now subject to a key strength check

  For signature generation, if the security strength of the digest algorithm
  is weaker than the security strength of the key used to sign the signature
  (e.g. using (2048, 256)-bit DSA keys with SHA1withDSA signature), the
  operation will fail with the error message:

  "The security strength of SHA1 digest algorithm is not sufficient for this
  key size."

  JDK-8138593 (not public)

http://www.oracle.com/technetwork/java/javase/8u91-relnotes-2949462.html
http://www.oracle.com/technetwork/java/javaseproducts/documentation/javase7supportreleasenotes-1601161.html#R170_101
http://www.oracle.com/technetwork/java/javase/documentation/overview-156328.html#R160_115
Comment 2 Tomas Hoger 2016-04-19 16:59:36 EDT
Public now via Oracle Critical Patch Update - April 2016.  Fixed in Oracle Java SE 6u115, 7u101, and 8u91.

External References:

http://www.oracle.com/technetwork/topics/security/cpuapr2016-2881694.html#AppendixJAVA
Comment 3 errata-xmlrpc 2016-04-20 15:35:39 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2016:0651 https://rhn.redhat.com/errata/RHSA-2016-0651.html
Comment 4 errata-xmlrpc 2016-04-20 15:36:16 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:0650 https://rhn.redhat.com/errata/RHSA-2016-0650.html
Comment 5 errata-xmlrpc 2016-04-21 09:46:39 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 7

Via RHSA-2016:0676 https://rhn.redhat.com/errata/RHSA-2016-0676.html
Comment 6 errata-xmlrpc 2016-04-21 10:43:15 EDT
This issue has been addressed in the following products:

  Oracle Java for Red Hat Enterprise Linux 6
  Oracle Java for Red Hat Enterprise Linux 7

Via RHSA-2016:0677 https://rhn.redhat.com/errata/RHSA-2016-0677.html
Comment 7 errata-xmlrpc 2016-04-21 10:44:26 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2016:0675 https://rhn.redhat.com/errata/RHSA-2016-0675.html
Comment 8 errata-xmlrpc 2016-04-21 10:59:02 EDT
This issue has been addressed in the following products:

  Oracle Java for Red Hat Enterprise Linux 7
  Oracle Java for Red Hat Enterprise Linux 5
  Oracle Java for Red Hat Enterprise Linux 6

Via RHSA-2016:0679 https://rhn.redhat.com/errata/RHSA-2016-0679.html
Comment 9 errata-xmlrpc 2016-04-21 10:59:56 EDT
This issue has been addressed in the following products:

  Oracle Java for Red Hat Enterprise Linux 5
  Oracle Java for Red Hat Enterprise Linux 6
  Oracle Java for Red Hat Enterprise Linux 7

Via RHSA-2016:0678 https://rhn.redhat.com/errata/RHSA-2016-0678.html
Comment 10 Tomas Hoger 2016-04-21 15:47:29 EDT
OpenJDK8 upstream commit:

http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/594e8dca337c
Comment 11 errata-xmlrpc 2016-05-09 10:05:22 EDT
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7
  Red Hat Enterprise Linux 5
  Red Hat Enterprise Linux 6

Via RHSA-2016:0723 https://rhn.redhat.com/errata/RHSA-2016-0723.html

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