Security Advisories (2)
A heap buffer overflow vulnerability was discovered in Perl. 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.
- https://github.com/Perl/perl5/commit/87f42aa0e0096e9a346c9672aa3a0bd3bef8c1dd.patch
- https://metacpan.org/release/SHAY/perl-5.38.4/changes
- https://metacpan.org/release/SHAY/perl-5.40.2/changes
- http://www.openwall.com/lists/oss-security/2025/04/13/3
- http://www.openwall.com/lists/oss-security/2025/04/13/4
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
- https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=1098226
- https://github.com/Perl/perl5/commit/11a11ecf4bea72b17d250cfb43c897be1341861e
- https://github.com/Perl/perl5/commit/918bfff86ca8d6d4e4ec5b30994451e0bd74aba9.patch
- https://github.com/Perl/perl5/issues/10387
- https://github.com/Perl/perl5/issues/23010
- https://perldoc.perl.org/5.14.0/perl5136delta#Directory-handles-not-copied-to-threads
- https://www.openwall.com/lists/oss-security/2025/05/22/2
- http://www.openwall.com/lists/oss-security/2025/05/23/1
- http://www.openwall.com/lists/oss-security/2025/05/30/4
NAME
DBM_Filter::utf8 - filter for DBM_Filter
SYNOPSIS
use SDBM_File; # or DB_File, GDBM_File, NDBM_File, or ODBM_File
use DBM_Filter;
$db = tie %hash, ...
$db->Filter_Push('utf8');DESCRIPTION
This Filter will ensure that all data written to the DBM will be encoded in UTF-8.
This module uses the Encode module.
SEE ALSO
DBM_Filter, perldbmfilter, Encode
AUTHOR
Paul Marquess pmqs@cpan.org
Module Install Instructions
To install less, copy and paste the appropriate command in to your terminal.
cpanm lessperl -MCPAN -e shell
install lessFor more information on module installation, please visit the detailed CPAN module installation guide.