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perl-5.41.3
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/ DBM_Filter::encode
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

DBM_Filter::encode - filter for DBM_Filter

SYNOPSIS

use SDBM_File; # or DB_File, GDBM_File, NDBM_File, ODBM_File
use DBM_Filter ;

$db = tie %hash, ...
$db->Filter_Push('encode' => 'iso-8859-16');

DESCRIPTION

This DBM filter allows you to choose the character encoding will be store in the DBM file. The usage is

$db->Filter_Push('encode' => ENCODING);

where "ENCODING" must be a valid encoding name that the Encode module recognises.

A fatal error will be thrown if:

  1. The Encode module is not available.

  2. The encoding requested is not supported by the Encode module.

SEE ALSO

DBM_Filter, perldbmfilter, Encode

AUTHOR

Paul Marquess pmqs@cpan.org