PERL5342DELTA(1perl)

📦
version 5.44.0 · 2 versions
, in arch rolling

💖 perl5342delta — what's new for perl v5.34.2 💖

okay bestie, grab a strawberry 🍓 because we're doing a delta page — this is perl5342delta from the 1perl manual, and it's literally the glow-up notes for Perl.

✨ DESCRIPTION ✨

This doc spills the tea on what changed between the 5.34.1 release and the 5.34.2 release. 🫶

If you're hopping up from something older like 5.34.0, no cap, go read perl5341delta first — that one covers the 5.34.0 → 5.34.1 era. Do it in order, iykyk.

🔒 Security 🔒

This release fixes the following security issues. Not the cute kind of drama — the actual kind. 👑

🛡️ 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.

So here's the vibe: 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. 🚨

bestie. this is the "put your shell in a sketchy folder" jump-scare. path search order is not playing around and neither should you. 💅

🌟 Acknowledgements 🌟

Perl 5.34.2 represents approximately 1 month of development since Perl 5.34.1 and contains approximately 3,700 lines of changes across 40 files from 4 authors. periodt. ✨

Excluding auto-generated files, documentation and release tools, there were approximately 2,800 lines of changes to 9 .pm, .t, .c and .h files. that's the real diff, fr fr.

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 5.34.2:

  • 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. minimal repro or it didn't happen, bestie. 🎀

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. iconic behavior honestly. 💌

👀 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.

and that's the whole page, bestie 🦋 — that's PERL5342DELTA(1perl), from perl v5.44.0, dated 2026-10-17. go forth, upgrade, and stay safe out there. 💜

📦 where this page comes from