PERL5363DELTA(1) Perl Programmers Reference Guide PERL5363DELTA(1) #
PERL5363DELTA(1) Perl Programmers Reference Guide PERL5363DELTA(1)
NNAAMMEE #
perldelta - what is new for perl v5.36.3
DDEESSCCRRIIPPTTIIOONN #
This document describes differences between the 5.36.1 release and the
5.36.3 release. PPlleeaassee nnoottee:: This document ignores Perl 5.36.2, a broken
release which existed for a couple of days only.
If you are upgrading from an earlier release such as 5.36.0, first read
perl5361delta, which describes differences between 5.36.0 and 5.36.1.
SSeeccuurriittyy This release fixes the following security issues.
CCVVEE--22002233--4477003388 -- WWrriittee ppaasstt bbuuffffeerr eenndd vviiaa iilllleeggaall uusseerr--ddeeffiinneedd UUnniiccooddee pprrooppeerrttyy 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.
CCVVEE--22002233--4477003399 -- PPeerrll ffoorr WWiinnddoowwss bbiinnaarryy hhiijjaacckkiinngg vvuullnneerraabbiilliittyy 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.
AAcckknnoowwlleeddggeemmeennttss Perl 5.36.3 represents approximately 1 month of development since Perl 5.36.1 and contains approximately 2,300 lines of changes across 38 files from 4 authors.
Excluding auto-generated files, documentation and release tools, there
were approximately 1,400 lines of changes to 8 .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 5.36.3:
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 _A_U_T_H_O_R_S file in the Perl source distribution.
RReeppoorrttiinngg BBuuggss 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.
GGiivvee TThhaannkkss 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.
SSEEEE AALLSSOO #
The _C_h_a_n_g_e_s file for an explanation of how to view exhaustive details on
what changed.
The _I_N_S_T_A_L_L file for how to build Perl.
The _R_E_A_D_M_E file for general stuff.
The _A_r_t_i_s_t_i_c and _C_o_p_y_i_n_g files for copyright information.
perl v5.36.3 2023-12-23 PERL5363DELTA(1)