3571e53040
patches for easier mirroring, to eliminate a special copy, to make www.freebsd.org/security a full copy of security.freebsd.org and be eventually be the same. For now files are just sitting there. The symlinks are missing. Discussed on: www (repository location) Discussed with: simon (so)
136 lines
5.6 KiB
Text
136 lines
5.6 KiB
Text
-----BEGIN PGP SIGNED MESSAGE-----
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Hash: SHA1
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=============================================================================
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FreeBSD-EN-07:04.zoneinfo Errata Notice
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The FreeBSD Project
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Topic: Zoneinfo file update
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Category: core
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Module: share_zoneinfo
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Announced: 2007-02-28
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Affects: FreeBSD 6.1-RELEASE
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Corrected: 2007-02-28 18:23:09 UTC (RELENG_6_1, 6.1-RELEASE-p15)
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For general information regarding FreeBSD Errata Notices and Security
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Advisories, including descriptions of the fields above, security
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branches, and the following sections, please visit
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<URL:http://security.freebsd.org/>.
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I. Background
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The tzsetup(8) program allows the user to specify the default local
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timezone. Based on the user's choice, tzsetup(8) copies one of the
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files from /usr/share/zoneinfo to /etc/localtime. This file actually
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controls the conversion.
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II. Problem Description
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In 2005 several governments, among them the United States of America and
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Canada, decided to change when Daylight Savings Time begins and ends.
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The change takes effect in 2007. Because of that change the data in
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the zoneinfo files needs to be updated, and if the computer's local
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time zone is affected tzsetup(8) needs to be run so /etc/localtime
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gets updated.
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FreeBSD 6.1-RELEASE shipped with the correct zoneinfo files for the United
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States time zones affected by the change made in 2005, but the zoneinfo
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files for several other countries (e.g. Canada) do not contain current
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information.
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III. Impact
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If the /usr/share/zoneinfo files as well as /etc/localtime are not updated
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on a computer that has its time zone set to one of the regions affected by
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the change made in 2005 it will display the wrong time between March 15th
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and April 1st, then again between October 28th and November 4th. All things
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on that computer that rely on the system time (e.g. cron jobs, timestamps
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entered in log files, etc) will be affected.
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IV. Workaround
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At least in theory the system time could be manually adjusted by an hour
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on the affected dates. However the system will still incorrectly say whether
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or not Daylight Savings Time is in effect (e.g. it will still say the
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time is "EST" instead of "EDT" for the Eastern US). Doing this is NOT
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recommended because the kernel stores timestamp information in the
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filesystem and other places using its internal representation of time
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(based on UTC).
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Since the following is such a frequently asked question we will mention
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the answer here. Using an NTP server as the source of your system's
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time will NOT automatically take care of the change in Daylight Savings
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Time. This patch should still be applied if you are in a region that
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is affected.
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V. Solution
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Following the instructions in this Errata Notice will update all of
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the zoneinfo files to be the same as what was released with FreeBSD
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6.2-RELEASE.
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Perform one of the following:
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1) Upgrade your affected system to 6-STABLE or to the RELENG_6_1
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security branch dated after the correction date.
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2) To patch your present system:
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The following patches have been verified to apply to FreeBSD 6.1
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systems.
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a) Download the relevant patch from the location below, and verify the
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detached PGP signature using your PGP utility.
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# fetch http://security.FreeBSD.org/patches/EN-07:04/zoneinfo.patch
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# fetch http://security.FreeBSD.org/patches/EN-07:04/zoneinfo.patch.asc
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b) Execute the following commands as root:
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# cd /usr/src
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# patch < /path/to/patch
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# cd /usr/src/share/misc
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# make obj && make depend && make && make install
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# cd /usr/src/share/zoneinfo
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# make obj && make depend && make && make install
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# tzsetup
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VI. Correction details
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The following list contains the revision numbers of each file that was
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corrected in FreeBSD.
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Branch Revision
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Path
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- -------------------------------------------------------------------------
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RELENG_6_1
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src/UPDATING 1.416.2.22.2.17
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src/sys/conf/newvers.sh 1.69.2.11.2.17
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src/share/misc/iso3166 1.13.12.1
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src/share/zoneinfo/Makefile 1.20.6.1
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src/share/zoneinfo/africa 1.14.14.2.2.1
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src/share/zoneinfo/antarctica 1.1.2.10.12.2.2.1
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src/share/zoneinfo/asia 1.25.2.2.2.1
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src/share/zoneinfo/australasia 1.25.10.2.2.1
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src/share/zoneinfo/backward 1.1.2.11.2.2.2.1
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src/share/zoneinfo/etcetera 1.1.2.5.14.1.2.1
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src/share/zoneinfo/europe 1.29.2.2.2.1
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src/share/zoneinfo/factory 1.5.38.1
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src/share/zoneinfo/leapseconds 1.13.2.1.2.1
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src/share/zoneinfo/northamerica 1.25.2.2.2.1
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src/share/zoneinfo/southamerica 1.24.2.2.2.1
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src/share/zoneinfo/systemv 1.1.2.2.14.1.2.1
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src/share/zoneinfo/yearistype.sh 1.1.2.5.14.1.2.1
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src/share/zoneinfo/zone.tab 1.17.2.1.2.1
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- -------------------------------------------------------------------------
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The latest revision of this Errata Notice is available at
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http://security.FreeBSD.org/advisories/FreeBSD-EN-07:04.zoneinfo.asc
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