Security Advisories (1)
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

ExtUtils::Constant::Utils - helper functions for ExtUtils::Constant

SYNOPSIS

use ExtUtils::Constant::Utils qw (C_stringify);
$C_code = C_stringify $stuff;

DESCRIPTION

ExtUtils::Constant::Utils packages up utility subroutines used by ExtUtils::Constant, ExtUtils::Constant::Base and derived classes. All its functions are explicitly exportable.

USAGE

C_stringify NAME

A function which returns a 7 bit ASCII correctly \ escaped version of the string passed suitable for C's "" or ''. It will die if passed Unicode characters.

perl_stringify NAME

A function which returns a 7 bit ASCII correctly \ escaped version of the string passed suitable for a perl "" string.

AUTHOR

Nicholas Clark <nick@ccl4.org> based on the code in h2xs by Larry Wall and others