Issued:

2016-02-09

Updated:

2016-02-09

RHEA-2016:0154 - tzdata enhancement update

Synopsis

tzdata enhancement update

Type/Severity

Product Enhancement Advisory (none)

Topic

Updated tzdata packages that that fix several bug and add various enhancements are now available for Red Hat Enterprise Linux 4 Extended Life Cycle Support, Red Hat Enterprise Linux 5.6 Long Life, Red Hat Enterprise Linux 5.9 Advanced Update Support, Red Hat Enterprise Linux 5.11, Red Hat Enterprise Linux 6.2 Advanced Update Support, Red Hat Enterprise Linux 6.4 Advanced Update Support, Red Hat Enterprise Linux 6.5 Advanced Update Support, Red Hat Enterprise Linux 6.6 Extended Update Support, Red Hat Enterprise Linux 6.7, Red Hat Enterprise Linux 7.1 Extended Update Support, Red Hat Enterprise Linux 7.1 Little Endian Extended Update Support, and Red Hat Enterprise Linux 7.2.

Description

The tzdata packages contain data files with rules for various time zones.

The tzdata packages have been upgraded to upstream version 2016a, which provides a number of bug fixes and enhancements over the previous version, notably:

• Prior to this update, an incorrect assumption was made about the daylight saving time (DST) in the America/Cayman time zone this year, which was reflected in the code. The mentioned time zone will not have DST this year. To fix this bug, the previous change has been reverted.

• The Asia/Chita time zone switches from +0800 to +0900 on 2016-03-27 at 02:00. This change has been implemented.

• The DST predictions for the Asia/Tehran time zone for the year 2038 and later are now March 21 00:00 to September 21 00:00. This premise has been implemented.

See the References section for a link to the upstream announcement. (BZ#1302734, BZ#1302733, BZ#1302740, BZ#1302741)

This update also fixes the following bug:

• Starting from 2027, the Java timezone generation tool would incorrectly calculate the Africa/Casablanca time transitions. This bug has been fixed, and the tool will calculate these transitions correctly. (BZ#1292837)

In addition, this update adds the following enhancement:

• At present, in Red Hat Enterprise Linux 6, the /etc/localtime file is not preserved across package updates even when it is a symbolic link. This tzdata version contains preparatory work to support preserving /etc/localtime across package upgrades if it is a symbolic link. Currently, this change is inactive, and the time zone must still be configured through /etc/sysconfig/clock. The change will be supported by a future glibc update. (BZ#1292833)

Users of tzdata are advised to upgrade to these updated packages, which fix these bugs and add these enhancements.

Solution

Before applying this update, make sure all previously released errata relevant to your system have been applied.

For details on how to apply this update, refer to:

https://access.redhat.com/articles/11258

Affected Products

Updated Packages

• tzdata-2016a-1.el5.ppc.rpm
• tzdata-2016a-1.el4.noarch.rpm
• tzdata-java-2016a-2.el6.noarch.rpm
• tzdata-2016a-2.el6.src.rpm
• tzdata-2016a-1.el5.ia64.rpm
• tzdata-java-2016a-1.el7.noarch.rpm
• tzdata-2016a-1.el5.src.rpm
• tzdata-2016a-1.el5.x86_64.rpm
• tzdata-2016a-1.el7.noarch.rpm
• tzdata-2016a-1.el5.i386.rpm
• tzdata-2016a-1.el4.src.rpm
• tzdata-java-2016a-1.el5.x86_64.rpm
• tzdata-2016a-2.el6.noarch.rpm
• tzdata-2016a-1.el5.s390x.rpm
• tzdata-java-2016a-1.el5.i386.rpm

Fixes

• This content is not included.BZ - 1292837
• This content is not included.BZ - 1302733
• This content is not included.BZ - 1302734
• This content is not included.BZ - 1302740
• This content is not included.BZ - 1302741

CVEs

(none)

References

• Content from mm.icann.org is not included.Content from mm.icann.org is not included.http://mm.icann.org/pipermail/tz-announce/2016-January/000035.html

Additional information

• The Red Hat security contact is This content is not included.secalert@redhat.com. More contact details at https://access.redhat.com/security/team/contact/.
• Offline Security Data data is available for integration with other systems. See Offline Security Data API to get started.