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

6       perldelta - what is new for perl v5.38.2
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DESCRIPTION

9       This document describes differences between the 5.38.0 release and the
10       5.38.2 release.  Please note: This document ignores Perl 5.38.1, a
11       broken release which existed for a couple of days only.
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13       If you are upgrading from an earlier release such as 5.37.0, first read
14       perl5380delta, which describes differences between 5.37.0 and 5.38.0.
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Security

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

47       Perl 5.38.2 represents approximately 5 months of development since Perl
48       5.38.0 and contains approximately 6,100 lines of changes across 34
49       files from 4 authors.
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51       Excluding auto-generated files, documentation and release tools, there
52       were approximately 1,300 lines of changes to 9 .pm, .t, .c and .h
53       files.
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55       Perl continues to flourish into its fourth decade thanks to a vibrant
56       community of users and developers. The following people are known to
57       have contributed the improvements that became Perl 5.38.2:
58
59       Karl Williamson, Paul Evans, Steve Hay, Tony Cook.
60
61       The list above is almost certainly incomplete as it is automatically
62       generated from version control history. In particular, it does not
63       include the names of the (very much appreciated) contributors who
64       reported issues to the Perl bug tracker.
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66       Many of the changes included in this version originated in the CPAN
67       modules included in Perl's core. We're grateful to the entire CPAN
68       community for helping Perl to flourish.
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70       For a more complete list of all of Perl's historical contributors,
71       please see the AUTHORS file in the Perl source distribution.
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Reporting Bugs

74       If you find what you think is a bug, you might check the perl bug
75       database at <https://github.com/Perl/perl5/issues>.  There may also be
76       information at <http://www.perl.org/>, the Perl Home Page.
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78       If you believe you have an unreported bug, please open an issue at
79       <https://github.com/Perl/perl5/issues>.  Be sure to trim your bug down
80       to a tiny but sufficient test case.
81
82       If the bug you are reporting has security implications which make it
83       inappropriate to send to a public issue tracker, then see "SECURITY
84       VULNERABILITY CONTACT INFORMATION" in perlsec for details of how to
85       report the issue.
86

Give Thanks

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

97       The Changes file for an explanation of how to view exhaustive details
98       on what changed.
99
100       The INSTALL file for how to build Perl.
101
102       The README file for general stuff.
103
104       The Artistic and Copying files for copyright information.
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108perl v5.38.2                      2023-11-30                      PERLDELTA(1)