1PERL5381DELTA(1)       Perl Programmers Reference Guide       PERL5381DELTA(1)
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NAME

6       perl5381delta - what is new for perl v5.38.1
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DESCRIPTION

9       This document describes differences between the 5.38.0 release and the
10       5.38.1 release.
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12       If you are upgrading from an earlier release such as 5.37.0, first read
13       perl5380delta, which describes differences between 5.37.0 and 5.38.0.
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Security

16       This release fixes the following security issues.
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18   CVE-2023-47038 - Write past buffer end via illegal user-defined Unicode
19       property
20       This vulnerability was reported directly to the Perl security team by
21       Nathan Mills "the.true.nathan.mills@gmail.com".
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23       A crafted regular expression when compiled by perl 5.30.0 through
24       5.38.0 can cause a one-byte attacker controlled buffer overflow in a
25       heap allocated buffer.
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27   CVE-2023-47039 - Perl for Windows binary hijacking vulnerability
28       This vulnerability was reported to the Intel Product Security Incident
29       Response Team (PSIRT) by GitHub user ycdxsb
30       <https://github.com/ycdxsb/WindowsPrivilegeEscalation>. PSIRT then
31       reported it to the Perl security team.
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33       Perl for Windows relies on the system path environment variable to find
34       the shell ("cmd.exe"). When running an executable which uses Windows
35       Perl interpreter, Perl attempts to find and execute "cmd.exe" within
36       the operating system. However, due to path search order issues, Perl
37       initially looks for cmd.exe in the current working directory.
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39       An attacker with limited privileges can exploit this behavior by
40       placing "cmd.exe" in locations with weak permissions, such as
41       "C:\ProgramData". By doing so, when an administrator attempts to use
42       this executable from these compromised locations, arbitrary code can be
43       executed.
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Acknowledgements

46       Perl 5.38.1 represents approximately 5 months of development since Perl
47       5.38.0 and contains approximately 6,100 lines of changes across 34
48       files from 4 authors.
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50       Excluding auto-generated files, documentation and release tools, there
51       were approximately 1,300 lines of changes to 9 .pm, .t, .c and .h
52       files.
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54       Perl continues to flourish into its fourth decade thanks to a vibrant
55       community of users and developers. The following people are known to
56       have contributed the improvements that became Perl 5.38.1:
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58       Karl Williamson, Paul Evans, Steve Hay, Tony Cook.
59
60       The list above is almost certainly incomplete as it is automatically
61       generated from version control history. In particular, it does not
62       include the names of the (very much appreciated) contributors who
63       reported issues to the Perl bug tracker.
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65       Many of the changes included in this version originated in the CPAN
66       modules included in Perl's core. We're grateful to the entire CPAN
67       community for helping Perl to flourish.
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69       For a more complete list of all of Perl's historical contributors,
70       please see the AUTHORS file in the Perl source distribution.
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Reporting Bugs

73       If you find what you think is a bug, you might check the perl bug
74       database at <https://github.com/Perl/perl5/issues>.  There may also be
75       information at <http://www.perl.org/>, the Perl Home Page.
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77       If you believe you have an unreported bug, please open an issue at
78       <https://github.com/Perl/perl5/issues>.  Be sure to trim your bug down
79       to a tiny but sufficient test case.
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81       If the bug you are reporting has security implications which make it
82       inappropriate to send to a public issue tracker, then see "SECURITY
83       VULNERABILITY CONTACT INFORMATION" in perlsec for details of how to
84       report the issue.
85

Give Thanks

87       If you wish to thank the Perl 5 Porters for the work we had done in
88       Perl 5, you can do so by running the "perlthanks" program:
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90           perlthanks
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92       This will send an email to the Perl 5 Porters list with your show of
93       thanks.
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SEE ALSO

96       The Changes file for an explanation of how to view exhaustive details
97       on what changed.
98
99       The INSTALL file for how to build Perl.
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101       The README file for general stuff.
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103       The Artistic and Copying files for copyright information.
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107perl v5.38.2                      2023-11-30                  PERL5381DELTA(1)
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