/ 
perl-5.41.3
⭐ Starred 2013 / json_pp
Security Advisories (4)
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-2026-4176 (2026-03-29)

Perl versions from 5.9.4 before 5.40.4-RC1, from 5.41.0 before 5.42.2-RC1, from 5.43.0 before 5.43.9 contain a vulnerable version of Compress::Raw::Zlib. Compress::Raw::Zlib is included in the Perl package as a dual-life core module, and is vulnerable to CVE-2026-3381 due to a vendored version of zlib which has several vulnerabilities, including CVE-2026-27171. The bundled Compress::Raw::Zlib was updated to version 2.221 in Perl blead commit c75ae9cc164205e1b6d6dbd57bd2c65c8593fe94.

CVE-2026-8376 (2026-05-25)

Perl versions through 5.43.10 have a heap buffer overflow when compiling regular expressions with a repeated fixed string on 32-bit builds. Perl_study_chunk in regcomp_study.c checked the size of the joined substring buffer in characters rather than bytes. For a quantified fixed substring with a large minimum count, the byte length mincount * l could overflow SSize_t, producing an undersized SvGROW allocation; the subsequent copy writes past the end of the buffer. A caller that compiles an attacker-controlled regular expression on a 32-bit perl build triggers a heap buffer overflow at compile time.

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

json_pp - JSON::PP command utility

SYNOPSIS

json_pp [-v] [-f from_format] [-t to_format] [-json_opt options_to_json1[,options_to_json2[,...]]]

DESCRIPTION

json_pp converts between some input and output formats (one of them is JSON). This program was copied from json_xs and modified.

The default input format is json and the default output format is json with pretty option.

OPTIONS

-f

-f from_format

Reads a data in the given format from STDIN.

Format types:

json

as JSON

eval

as Perl code

-t

Writes a data in the given format to STDOUT.

null

no action.

json

as JSON

dumper

as Data::Dumper

-json_opt

options to JSON::PP

Acceptable options are:

ascii latin1 utf8 pretty indent space_before space_after relaxed canonical allow_nonref
allow_singlequote allow_barekey allow_bignum loose escape_slash indent_length

Multiple options must be separated by commas:

Right: -json_opt pretty,canonical

Wrong: -json_opt pretty -json_opt canonical

-v

Verbose option, but currently no action in fact.

-V

Prints version and exits.

EXAMPLES

$ perl -e'print q|{"foo":"あい","bar":1234567890000000000000000}|' |\
   json_pp -f json -t dumper -json_opt pretty,utf8,allow_bignum

$VAR1 = {
          'bar' => bless( {
                            'value' => [
                                         '0000000',
                                         '0000000',
                                         '5678900',
                                         '1234'
                                       ],
                            'sign' => '+'
                          }, 'Math::BigInt' ),
          'foo' => "\x{3042}\x{3044}"
        };

$ perl -e'print q|{"foo":"あい","bar":1234567890000000000000000}|' |\
   json_pp -f json -t dumper -json_opt pretty

$VAR1 = {
          'bar' => '1234567890000000000000000',
          'foo' => "\x{e3}\x{81}\x{82}\x{e3}\x{81}\x{84}"
        };

SEE ALSO

JSON::PP, json_xs

AUTHOR

Makamaka Hannyaharamitu, <makamaka[at]cpan.org>

COPYRIGHT AND LICENSE

Copyright 2010 by Makamaka Hannyaharamitu

This library is free software; you can redistribute it and/or modify it under the same terms as Perl itself.