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perl-5.40.1
⭐ Starred 2013 / I18N::Collate
Security Advisories (2)
CVE-2024-56406 (2025-04-13)

A heap buffer overflow vulnerability was discovered in Perl. Release branches 5.34, 5.36, 5.38 and 5.40 are affected, including development versions from 5.33.1 through 5.41.10. When there are non-ASCII bytes in the left-hand-side of the `tr` operator, `S_do_trans_invmap` can overflow the destination pointer `d`.    $ perl -e '$_ = "\x{FF}" x 1000000; tr/\xFF/\x{100}/;'    Segmentation fault (core dumped) It is believed that this vulnerability can enable Denial of Service and possibly Code Execution attacks on platforms that lack sufficient defenses.

CVE-2025-40909 (2025-05-30)

Perl threads have a working directory race condition where file operations may target unintended paths. If a directory handle is open at thread creation, the process-wide current working directory is temporarily changed in order to clone that handle for the new thread, which is visible from any third (or more) thread already running. This may lead to unintended operations such as loading code or accessing files from unexpected locations, which a local attacker may be able to exploit. The bug was introduced in commit 11a11ecf4bea72b17d250cfb43c897be1341861e and released in Perl version 5.13.6

NAME

I18N::Collate - compare 8-bit scalar data according to the current locale

SYNOPSIS

use I18N::Collate;
setlocale(LC_COLLATE, 'locale-of-your-choice');
$s1 = I18N::Collate->new("scalar_data_1");
$s2 = I18N::Collate->new("scalar_data_2");

DESCRIPTION

  ***

  WARNING: starting from the Perl version 5.003_06
  the I18N::Collate interface for comparing 8-bit scalar data
  according to the current locale

	HAS BEEN DEPRECATED

  That is, please do not use it anymore for any new applications
  and please migrate the old applications away from it because its
  functionality was integrated into the Perl core language in the
  release 5.003_06.

  See the perllocale manual page for further information.

  ***

This module provides you with objects that will collate according to your national character set, provided that the POSIX setlocale() function is supported on your system.

You can compare $s1 and $s2 above with

$s1 le $s2

to extract the data itself, you'll need a dereference: $$s1

This module uses POSIX::setlocale(). The basic collation conversion is done by strxfrm() which terminates at NUL characters being a decent C routine. collate_xfrm() handles embedded NUL characters gracefully.

The available locales depend on your operating system; try whether locale -a shows them or man pages for "locale" or "nlsinfo" or the direct approach ls /usr/lib/nls/loc or ls /usr/lib/nls or ls /usr/lib/locale. Not all the locales that your vendor supports are necessarily installed: please consult your operating system's documentation and possibly your local system administration. The locale names are probably something like xx_XX.(ISO)?8859-N or xx_XX.(ISO)?8859N, for example fr_CH.ISO8859-1 is the Swiss (CH) variant of French (fr), ISO Latin (8859) 1 (-1) which is the Western European character set.