perl5281delta(1)

1PERL5281DELTA(1)       Perl Programmers Reference Guide       PERL5281DELTA(1)
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NAME

6       perl5281delta - what is new for perl v5.28.1
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DESCRIPTION

9       This document describes differences between the 5.28.0 release and the
10       5.28.1 release.
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12       If you are upgrading from an earlier release such as 5.26.0, first read
13       perl5280delta, which describes differences between 5.26.0 and 5.28.0.
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Security

16   [CVE-2018-18311] Integer overflow leading to buffer overflow and
17       segmentation fault
18       Integer arithmetic in "Perl_my_setenv()" could wrap when the combined
19       length of the environment variable name and value exceeded around
20       0x7fffffff.  This could lead to writing beyond the end of an allocated
21       buffer with attacker supplied data.
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23       [GH #16560] <https://github.com/Perl/perl5/issues/16560>
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25   [CVE-2018-18312] Heap-buffer-overflow write in S_regatom (regcomp.c)
26       A crafted regular expression could cause heap-buffer-overflow write
27       during compilation, potentially allowing arbitrary code execution.
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29       [GH #16649] <https://github.com/Perl/perl5/issues/16649>
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Incompatible Changes

32       There are no changes intentionally incompatible with 5.28.0.  If any
33       exist, they are bugs, and we request that you submit a report.  See
34       "Reporting Bugs" below.
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Modules and Pragmata

37   Updated Modules and Pragmata
38       •   Module::CoreList has been upgraded from version 5.20180622 to
39           5.20181129_28.
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Selected Bug Fixes

42       •   Perl 5.28 introduced an "index()" optimization when comparing to -1
43           (or indirectly, e.g. >= 0).  When this optimization was triggered
44           inside a "when" clause it caused a warning ("Argument %s isn't
45           numeric in smart match").  This has now been fixed.  [GH #16626]
46           <https://github.com/Perl/perl5/issues/16626>
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48       •   Matching of decimal digits in script runs, introduced in Perl 5.28,
49           had a bug that led to "1\N{THAI DIGIT FIVE}" matching
50           "/^(*sr:\d+)$/" when it should not.  This has now been fixed.
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52       •   The new in-place editing code no longer leaks directory handles.
53           [GH #16602] <https://github.com/Perl/perl5/issues/16602>
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Acknowledgements

56       Perl 5.28.1 represents approximately 5 months of development since Perl
57       5.28.0 and contains approximately 6,100 lines of changes across 44
58       files from 12 authors.
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60       Excluding auto-generated files, documentation and release tools, there
61       were approximately 700 lines of changes to 12 .pm, .t, .c and .h files.
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63       Perl continues to flourish into its fourth decade thanks to a vibrant
64       community of users and developers.  The following people are known to
65       have contributed the improvements that became Perl 5.28.1:
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67       Aaron Crane, Abigail, Chris 'BinGOs' Williams, Dagfinn Ilmari
68       Mannsaaker, David Mitchell, James E Keenan, John SJ Anderson, Karen
69       Etheridge, Karl Williamson, Sawyer X, Steve Hay, Tony Cook.
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71       The list above is almost certainly incomplete as it is automatically
72       generated from version control history.  In particular, it does not
73       include the names of the (very much appreciated) contributors who
74       reported issues to the Perl bug tracker.
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76       Many of the changes included in this version originated in the CPAN
77       modules included in Perl's core.  We're grateful to the entire CPAN
78       community for helping Perl to flourish.
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80       For a more complete list of all of Perl's historical contributors,
81       please see the AUTHORS file in the Perl source distribution.
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Reporting Bugs

84       If you find what you think is a bug, you might check the perl bug
85       database at <https://rt.perl.org/> .  There may also be information at
86       <http://www.perl.org/> , the Perl Home Page.
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88       If you believe you have an unreported bug, please run the perlbug
89       program included with your release.  Be sure to trim your bug down to a
90       tiny but sufficient test case.  Your bug report, along with the output
91       of "perl -V", will be sent off to perlbug@perl.org to be analysed by
92       the Perl porting team.
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94       If the bug you are reporting has security implications which make it
95       inappropriate to send to a publicly archived mailing list, then see
96       "SECURITY VULNERABILITY CONTACT INFORMATION" in perlsec for details of
97       how to report the issue.
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Give Thanks

100       If you wish to thank the Perl 5 Porters for the work we had done in
101       Perl 5, you can do so by running the "perlthanks" program:
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103           perlthanks
104
105       This will send an email to the Perl 5 Porters list with your show of
106       thanks.
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