Bug 1298906 - (CVE-2016-0494) CVE-2016-0494 ICU: integer signedness issue in IndicRearrangementProcessor (OpenJDK 2D, 8140543)
CVE-2016-0494 ICU: integer signedness issue in IndicRearrangementProcessor (O...
Status: CLOSED ERRATA
Product: Security Response
Classification: Other
Component: vulnerability (Show other bugs)
unspecified
All Linux
urgent Severity urgent
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Assigned To: Red Hat Product Security
impact=critical,public=20160119,repor...
: Security
Depends On:
Blocks: 1295699
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Reported: 2016-01-15 07:11 EST by Tomas Hoger
Modified: 2016-07-18 09:56 EDT (History)
5 users (show)

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Doc Type: Bug Fix
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Last Closed: 2016-02-02 10:21:01 EST
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Description Tomas Hoger 2016-01-15 07:11:01 EST
Integer signedness issues were discovered in IndicRearrangementProcessor and IndicRearrangementProcessor2 in the ICU Layout Engine.  A specially crafted font file could cause an application using ICU to parse untrusted fonts to crash and, possibly, execute arbitrary code.

ICU code is embedded the 2D component in OpenJDK and used by FontManager.  An untrusted Java application or applet could use this flaw to execute arbitrary code with Java Virtual Machine privileges and bypass Java sandbox restrictions.
Comment 1 Tomas Hoger 2016-01-15 07:15:44 EST
Upstream fix changes type of firstGlyph and lastGlyph from unsigned int to signed int, reverting part of the fix for CVE-2015-4844 (bug 1273318) applied as part of the previous Oct 2015 CPU:

http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/dbb4e2bdfa9e#l2.15

This change also impacts boundary checks added in the same commit, as they may be optimized out by compiler when signed types are used.

The above patch has not been applied to ICU yet, hence ICU packages are not affected.  Upstream ICU bug report for CVE-2015-4844:

http://bugs.icu-project.org/trac/ticket/12020
Comment 2 Tomas Hoger 2016-01-19 16:51:01 EST
Public now via Oracle Critical Patch Update - January 2016.  Fixed in Oracle Java SE 6u111, 7u95, and 8u71.

External References:

http://www.oracle.com/technetwork/topics/security/cpujan2016-2367955.html#AppendixJAVA
Comment 3 Tomas Hoger 2016-01-20 08:57:00 EST
OpenJDK 8 upstream commit:

http://hg.openjdk.java.net/jdk8u/jdk8u/jdk/rev/f556d4c82ef1
Comment 4 errata-xmlrpc 2016-01-20 14:14:55 EST
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2016:0050 https://rhn.redhat.com/errata/RHSA-2016-0050.html
Comment 5 errata-xmlrpc 2016-01-20 14:32:40 EST
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7

Via RHSA-2016:0049 https://rhn.redhat.com/errata/RHSA-2016-0049.html
Comment 6 errata-xmlrpc 2016-01-21 06:23:14 EST
This issue has been addressed in the following products:

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

Via RHSA-2016:0057 https://rhn.redhat.com/errata/RHSA-2016-0057.html
Comment 7 errata-xmlrpc 2016-01-21 06:39:48 EST
This issue has been addressed in the following products:

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

Via RHSA-2016:0056 https://rhn.redhat.com/errata/RHSA-2016-0056.html
Comment 8 errata-xmlrpc 2016-01-21 06:41:05 EST
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-2016:0055 https://rhn.redhat.com/errata/RHSA-2016-0055.html
Comment 9 errata-xmlrpc 2016-01-21 06:42:55 EST
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 6

Via RHSA-2016:0053 https://rhn.redhat.com/errata/RHSA-2016-0053.html
Comment 10 errata-xmlrpc 2016-01-21 06:58:45 EST
This issue has been addressed in the following products:

  Red Hat Enterprise Linux 7
  Red Hat Enterprise Linux 5

Via RHSA-2016:0054 https://rhn.redhat.com/errata/RHSA-2016-0054.html
Comment 11 errata-xmlrpc 2016-01-26 08:12:20 EST
This issue has been addressed in the following products:

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

Via RHSA-2016:0067 https://rhn.redhat.com/errata/RHSA-2016-0067.html
Comment 12 errata-xmlrpc 2016-02-02 05:05:38 EST
This issue has been addressed in the following products:

  Supplementary for Red Hat Enterprise Linux 6
  Supplementary for Red Hat Enterprise Linux 5

Via RHSA-2016:0101 https://rhn.redhat.com/errata/RHSA-2016-0101.html
Comment 13 errata-xmlrpc 2016-02-02 05:07:06 EST
This issue has been addressed in the following products:

  Supplementary for Red Hat Enterprise Linux 5

Via RHSA-2016:0100 https://rhn.redhat.com/errata/RHSA-2016-0100.html
Comment 14 errata-xmlrpc 2016-02-02 08:39:49 EST
This issue has been addressed in the following products:

  Supplementary for Red Hat Enterprise Linux 7

Via RHSA-2016:0098 https://rhn.redhat.com/errata/RHSA-2016-0098.html
Comment 15 errata-xmlrpc 2016-02-02 08:53:50 EST
This issue has been addressed in the following products:

  Supplementary for Red Hat Enterprise Linux 7
  Supplementary for Red Hat Enterprise Linux 6

Via RHSA-2016:0099 https://rhn.redhat.com/errata/RHSA-2016-0099.html
Comment 17 errata-xmlrpc 2016-07-18 09:56:29 EDT
This issue has been addressed in the following products:

  Red Hat Satellite 5.6
  Red Hat Satellite 5.7

Via RHSA-2016:1430 https://access.redhat.com/errata/RHSA-2016:1430

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