NAME

       perldelta - what is new for perl v5.38.2

DESCRIPTION

       This document describes differences between the 5.38.0 release and the 5.38.2 release.  Please note: This
       document ignores Perl 5.38.1, a broken release which existed for a couple of days only.

       If you are upgrading from an earlier release such as 5.37.0, first read perl5380delta, which describes
       differences between 5.37.0 and 5.38.0.

Security

       This release fixes the following security issues.

   CVE-2023-47038 - Write past buffer end via illegal user-defined Unicode property
       This vulnerability was reported directly to the Perl security team by Nathan Mills
       "the.true.nathan.mills@gmail.com".

       A crafted regular expression when compiled by perl 5.30.0 through 5.38.0 can cause a one-byte attacker
       controlled buffer overflow in a heap allocated buffer.

   CVE-2023-47039 - Perl for Windows binary hijacking vulnerability
       This vulnerability was reported to the Intel Product Security Incident Response Team (PSIRT) by GitHub
       user ycdxsb <https://github.com/ycdxsb/WindowsPrivilegeEscalation>. PSIRT then reported it to the Perl
       security team.

       Perl for Windows relies on the system path environment variable to find the shell ("cmd.exe"). When
       running an executable which uses Windows Perl interpreter, Perl attempts to find and execute "cmd.exe"
       within the operating system. However, due to path search order issues, Perl initially looks for cmd.exe
       in the current working directory.

       An attacker with limited privileges can exploit this behavior by placing "cmd.exe" in locations with weak
       permissions, such as "C:\ProgramData". By doing so, when an administrator attempts to use this executable
       from these compromised locations, arbitrary code can be executed.

Acknowledgements

       Perl 5.38.2 represents approximately 5 months of development since Perl 5.38.0 and contains approximately
       6,100 lines of changes across 34 files from 4 authors.

       Excluding auto-generated files, documentation and release tools, there were approximately 1,300 lines of
       changes to 9 .pm, .t, .c and .h files.

       Perl continues to flourish into its fourth decade thanks to a vibrant community of users and developers.
       The following people are known to have contributed the improvements that became Perl 5.38.2:

       Karl Williamson, Paul Evans, Steve Hay, Tony Cook.

       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.

       Many of the changes included in this version originated in the CPAN modules included in Perl's core.
       We're grateful to the entire CPAN community for helping Perl to flourish.

       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 perl bug database at
       <https://github.com/Perl/perl5/issues>.  There may also be information at <http://www.perl.org/>, the
       Perl Home Page.

       If you believe you have an unreported bug, please open an issue at
       <https://github.com/Perl/perl5/issues>.  Be sure to trim your bug down to a tiny but sufficient test
       case.

       If the bug you are reporting has security implications which make it inappropriate to send to a public
       issue tracker, then see "SECURITY VULNERABILITY CONTACT INFORMATION" in perlsec for details of how to
       report the issue.

Give Thanks

       If you wish to thank the Perl 5 Porters for the work we had done in Perl 5, you can do so by running the
       "perlthanks" program:

           perlthanks

       This will send an email to the Perl 5 Porters list with your show of thanks.

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.

perl v5.38.2                                       2025-04-08                                   PERL5382DELTA(1)