Provided by: perl-doc_5.34.0-3ubuntu1.3_all 
NAME
perl5163delta - what is new for perl v5.16.3
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 perl5162delta, which describes
differences between 5.16.1 and 5.16.2.
Core Enhancements
No changes since 5.16.0.
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.
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.
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.
memory leak in Encode
The UTF-8 encoding implementation in Encode.xs had a memory leak which has been fixed.
Incompatible Changes
There are no changes intentionally incompatible with 5.16.0. If any exist, they are bugs and reports are
welcome.
Deprecations
There have been no deprecations since 5.16.0.
Modules and Pragmata
Updated Modules and Pragmata
• Encode has been upgraded from version 2.44 to version 2.44_01.
• Module::CoreList has been upgraded from version 2.76 to version 2.76_02.
• XS::APItest has been upgraded from version 0.38 to version 0.39.
Known Problems
None.
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 AUTHORS file in the
Perl source distribution.
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 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
"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.
SEE ALSO
The Changes file for an explanation of how to view exhaustive details on what changed.
The INSTALL file for how to build Perl.
The README file for general stuff.
The Artistic and Copying files for copyright information.