/ 
perl-5.40.2
⭐ Starred 2013
/ Tie::StdHandle
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

Tie::StdHandle - base class definitions for tied handles

SYNOPSIS

package NewHandle;
require Tie::Handle;

@ISA = qw(Tie::Handle);

sub READ { ... }		# Provide a needed method
sub TIEHANDLE { ... }	# Overrides inherited method


package main;

tie *FH, 'NewHandle';

DESCRIPTION

The Tie::StdHandle package provide most methods for file handles described in perltie (the exceptions are UNTIE and DESTROY). It causes tied file handles to behave exactly like standard file handles and allow for selective overwriting of methods.