[perl5.git] / pod / perl5163delta.pod

=encoding utf8

=head1 NAME

perl5163delta - what is new for perl v5.16.3

=head1 DESCRIPTION

This document describes differences between the 5.16.2 release and
the 5.16.3 release.

If you are upgrading from an earlier release such as 5.16.1, first read
L<perl5162delta>, which describes differences between 5.16.1 and
5.16.2.

=head1 Core Enhancements

No changes since 5.16.0.

=head1 Security

This release contains one major and a number of minor security fixes.
These latter are included mainly to allow the test suite to pass cleanly
with the clang compiler's address sanitizer facility.

=head2 CVE-2013-1667: memory exhaustion with arbitrary hash keys

With a carefully crafted set of hash keys (for example arguments on a
URL), it is possible to cause a hash to consume a large amount of memory
and CPU, and thus possibly to achieve a Denial-of-Service.

This problem has been fixed.

=head2 wrap-around with IO on long strings

Reading or writing strings greater than 2**31 bytes in size could segfault
due to integer wraparound.

This problem has been fixed.

=head2 memory leak in Encode

The UTF-8 encoding implementation in Encode.xs had a memory leak which has been
fixed.

=head1 Incompatible Changes

There are no changes intentionally incompatible with 5.16.0. If any
exist, they are bugs and reports are welcome.

=head1 Deprecations

There have been no deprecations since 5.16.0.

=head1 Modules and Pragmata

=head2 Updated Modules and Pragmata

=over 4

=item *

L<Encode> has been upgraded from version 2.44 to version 2.44_01.

=item *

L<Module::CoreList> has been upgraded from version 2.76 to version 2.76_02.

=item *

L<XS::APItest> has been upgraded from version 0.38 to version 0.39.

=back

=head1 Known Problems

None.

=head1 Acknowledgements

Perl 5.16.3 represents approximately 4 months of development since Perl 5.16.2
and contains approximately 870 lines of changes across 39 files from 7 authors.

Perl continues to flourish into its third decade thanks to a vibrant community
of users and developers. The following people are known to have contributed the
improvements that became Perl 5.16.3:

Andy Dougherty, Chris 'BinGOs' Williams, Dave Rolsky, David Mitchell, Michael
Schroeder, Ricardo Signes, Yves Orton.

The list above is almost certainly incomplete as it is automatically generated
from version control history. In particular, it does not include the names of
the (very much appreciated) contributors who reported issues to the Perl bug
tracker.

For a more complete list of all of Perl's historical contributors, please see
the F<AUTHORS> file in the Perl source distribution.

=head1 Reporting Bugs

If you find what you think is a bug, you might check the articles
recently posted to the comp.lang.perl.misc newsgroup and the perl
bug database at http://rt.perl.org/perlbug/ .  There may also be
information at http://www.perl.org/ , the Perl Home Page.

If you believe you have an unreported bug, please run the L<perlbug>
program included with your release.  Be sure to trim your bug down
to a tiny but sufficient test case.  Your bug report, along with the
output of C<perl -V>, will be sent off to perlbug@perl.org to be
analysed by the Perl porting team.

If the bug you are reporting has security implications, which make it
inappropriate to send to a publicly archived mailing list, then please
send it to perl5-security-report@perl.org. This points to a closed
subscription unarchived mailing list, which includes all the core
committers, who will be able to help assess the impact of issues, figure
out a resolution, and help co-ordinate the release of patches to
mitigate or fix the problem across all platforms on which Perl is
supported. Please only use this address for security issues in the Perl
core, not for modules independently distributed on CPAN.

=head1 SEE ALSO

The F<Changes> file for an explanation of how to view exhaustive details
on what changed.

The F<INSTALL> file for how to build Perl.

The F<README> file for general stuff.

The F<Artistic> and F<Copying> files for copyright information.

=cut
Commit	Line	Data
eaf7bcbf RS	1	=encoding utf8
	2
	3	=head1 NAME
	4
	5	perl5163delta - what is new for perl v5.16.3
	6
	7	=head1 DESCRIPTION
	8
	9	This document describes differences between the 5.16.2 release and
	10	the 5.16.3 release.
	11
	12	If you are upgrading from an earlier release such as 5.16.1, first read
	13	L<perl5162delta>, which describes differences between 5.16.1 and
	14	5.16.2.
	15
	16	=head1 Core Enhancements
	17
	18	No changes since 5.16.0.
	19
	20	=head1 Security
	21
	22	This release contains one major and a number of minor security fixes.
	23	These latter are included mainly to allow the test suite to pass cleanly
	24	with the clang compiler's address sanitizer facility.
	25
	26	=head2 CVE-2013-1667: memory exhaustion with arbitrary hash keys
	27
	28	With a carefully crafted set of hash keys (for example arguments on a
	29	URL), it is possible to cause a hash to consume a large amount of memory
	30	and CPU, and thus possibly to achieve a Denial-of-Service.
	31
	32	This problem has been fixed.
	33
	34	=head2 wrap-around with IO on long strings
	35
	36	Reading or writing strings greater than 2**31 bytes in size could segfault
	37	due to integer wraparound.
	38
	39	This problem has been fixed.
	40
	41	=head2 memory leak in Encode
	42
	43	The UTF-8 encoding implementation in Encode.xs had a memory leak which has been
	44	fixed.
	45
	46	=head1 Incompatible Changes
	47
	48	There are no changes intentionally incompatible with 5.16.0. If any
	49	exist, they are bugs and reports are welcome.
	50
	51	=head1 Deprecations
	52
	53	There have been no deprecations since 5.16.0.
	54
	55	=head1 Modules and Pragmata
	56
	57	=head2 Updated Modules and Pragmata
	58
	59	=over 4
	60
	61	=item *
	62
	63	L<Encode> has been upgraded from version 2.44 to version 2.44_01.
	64
65	=item *
66
67	L<Module::CoreList> has been upgraded from version 2.76 to version 2.76_02.
68
69	=item *
70
71	L<XS::APItest> has been upgraded from version 0.38 to version 0.39.
72
73	=back
74
75	=head1 Known Problems
76
77	None.
78
79	=head1 Acknowledgements
80
81	Perl 5.16.3 represents approximately 4 months of development since Perl 5.16.2
82	and contains approximately 870 lines of changes across 39 files from 7 authors.
83
84	Perl continues to flourish into its third decade thanks to a vibrant community
85	of users and developers. The following people are known to have contributed the
86	improvements that became Perl 5.16.3:
87
88	Andy Dougherty, Chris 'BinGOs' Williams, Dave Rolsky, David Mitchell, Michael
89	Schroeder, Ricardo Signes, Yves Orton.
90
91	The list above is almost certainly incomplete as it is automatically generated
92	from version control history. In particular, it does not include the names of
93	the (very much appreciated) contributors who reported issues to the Perl bug
94	tracker.
95
96	For a more complete list of all of Perl's historical contributors, please see
97	the F<AUTHORS> file in the Perl source distribution.
98
99	=head1 Reporting Bugs
100
101	If you find what you think is a bug, you might check the articles
102	recently posted to the comp.lang.perl.misc newsgroup and the perl
103	bug database at http://rt.perl.org/perlbug/ . There may also be
104	information at http://www.perl.org/ , the Perl Home Page.
105
106	If you believe you have an unreported bug, please run the L<perlbug>
107	program included with your release. Be sure to trim your bug down
108	to a tiny but sufficient test case. Your bug report, along with the
109	output of C<perl -V>, will be sent off to perlbug@perl.org to be
110	analysed by the Perl porting team.
111
112	If the bug you are reporting has security implications, which make it
113	inappropriate to send to a publicly archived mailing list, then please
114	send it to perl5-security-report@perl.org. This points to a closed
115	subscription unarchived mailing list, which includes all the core
116	committers, who will be able to help assess the impact of issues, figure
117	out a resolution, and help co-ordinate the release of patches to
118	mitigate or fix the problem across all platforms on which Perl is
119	supported. Please only use this address for security issues in the Perl
120	core, not for modules independently distributed on CPAN.
121
122	=head1 SEE ALSO
123
124	The F<Changes> file for an explanation of how to view exhaustive details
125	on what changed.
126
127	The F<INSTALL> file for how to build Perl.
128
129	The F<README> file for general stuff.
130
131	The F<Artistic> and F<Copying> files for copyright information.
132
133	=cut