/ 
perl-5.23.2
⭐ Starred 2013
/ Config::Perl::V
Security Advisories (19)
CVE-2016-6185 (2016-08-02)

The XSLoader::load method in XSLoader in Perl does not properly locate .so files when called in a string eval, which might allow local users to execute arbitrary code via a Trojan horse library under the current working directory.

CVE-2020-12723 (2020-06-05)

regcomp.c in Perl before 5.30.3 allows a buffer overflow via a crafted regular expression because of recursive S_study_chunk calls.

CVE-2020-10878 (2020-06-05)

Perl before 5.30.3 has an integer overflow related to mishandling of a "PL_regkind[OP(n)] == NOTHING" situation. A crafted regular expression could lead to malformed bytecode with a possibility of instruction injection.

CVE-2020-10543 (2020-06-05)

Perl before 5.30.3 on 32-bit platforms allows a heap-based buffer overflow because nested regular expression quantifiers have an integer overflow.

CVE-2018-6798 (2018-04-17)

An issue was discovered in Perl 5.22 through 5.26. Matching a crafted locale dependent regular expression can cause a heap-based buffer over-read and potentially information disclosure.

CVE-2018-6797 (2018-04-17)

An issue was discovered in Perl 5.18 through 5.26. A crafted regular expression can cause a heap-based buffer overflow, with control over the bytes written.

CVE-2018-6913 (2018-04-17)

Heap-based buffer overflow in the pack function in Perl before 5.26.2 allows context-dependent attackers to execute arbitrary code via a large item count.

CVE-2018-18314 (2018-12-07)

Perl before 5.26.3 has a buffer overflow via a crafted regular expression that triggers invalid write operations.

CVE-2018-18313 (2018-12-07)

Perl before 5.26.3 has a buffer over-read via a crafted regular expression that triggers disclosure of sensitive information from process memory.

CVE-2018-18312 (2018-12-05)

Perl before 5.26.3 and 5.28.0 before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.

CVE-2018-18311 (2018-12-07)

Perl before 5.26.3 and 5.28.x before 5.28.1 has a buffer overflow via a crafted regular expression that triggers invalid write operations.

CVE-2017-12883 (2017-09-19)

Buffer overflow in the S_grok_bslash_N function in regcomp.c in Perl 5 before 5.24.3-RC1 and 5.26.x before 5.26.1-RC1 allows remote attackers to disclose sensitive information or cause a denial of service (application crash) via a crafted regular expression with an invalid '\\N{U+...}' escape.

CVE-2017-12837 (2017-09-19)

Heap-based buffer overflow in the S_regatom function in regcomp.c in Perl 5 before 5.24.3-RC1 and 5.26.x before 5.26.1-RC1 allows remote attackers to cause a denial of service (out-of-bounds write) via a regular expression with a '\\N{}' escape and the case-insensitive modifier.

CVE-2015-8853 (2016-05-25)

The (1) S_reghop3, (2) S_reghop4, and (3) S_reghopmaybe3 functions in regexec.c in Perl before 5.24.0 allow context-dependent attackers to cause a denial of service (infinite loop) via crafted utf-8 data, as demonstrated by "a\x80."

CVE-2023-47100

In Perl before 5.38.2, S_parse_uniprop_string in regcomp.c can write to unallocated space because a property name associated with a \p{...} regular expression construct is mishandled. The earliest affected version is 5.30.0.

CVE-2023-47039 (2023-10-30)

Perl for Windows relies on the system path environment variable to find the shell (cmd.exe). When running an executable which uses Windows Perl interpreter, Perl attempts to find and execute cmd.exe within the operating system. However, due to path search order issues, Perl initially looks for cmd.exe in the current working directory. An attacker with limited privileges can exploit this behavior by placing cmd.exe in locations with weak permissions, such as C:\ProgramData. By doing so, when an administrator attempts to use this executable from these compromised locations, arbitrary code can be executed.

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

CVE-2015-8608 (2017-02-07)

The VDir::MapPathA and VDir::MapPathW functions in Perl 5.22 allow remote attackers to cause a denial of service (out-of-bounds read) and possibly execute arbitrary code via a crafted (1) drive letter or (2) pInName argument.

CVE-2016-1238 (2016-08-02)

(1) cpan/Archive-Tar/bin/ptar, (2) cpan/Archive-Tar/bin/ptardiff, (3) cpan/Archive-Tar/bin/ptargrep, (4) cpan/CPAN/scripts/cpan, (5) cpan/Digest-SHA/shasum, (6) cpan/Encode/bin/enc2xs, (7) cpan/Encode/bin/encguess, (8) cpan/Encode/bin/piconv, (9) cpan/Encode/bin/ucmlint, (10) cpan/Encode/bin/unidump, (11) cpan/ExtUtils-MakeMaker/bin/instmodsh, (12) cpan/IO-Compress/bin/zipdetails, (13) cpan/JSON-PP/bin/json_pp, (14) cpan/Test-Harness/bin/prove, (15) dist/ExtUtils-ParseXS/lib/ExtUtils/xsubpp, (16) dist/Module-CoreList/corelist, (17) ext/Pod-Html/bin/pod2html, (18) utils/c2ph.PL, (19) utils/h2ph.PL, (20) utils/h2xs.PL, (21) utils/libnetcfg.PL, (22) utils/perlbug.PL, (23) utils/perldoc.PL, (24) utils/perlivp.PL, and (25) utils/splain.PL in Perl 5.x before 5.22.3-RC2 and 5.24 before 5.24.1-RC2 do not properly remove . (period) characters from the end of the includes directory array, which might allow local users to gain privileges via a Trojan horse module under the current working directory.

NAME

Config::Perl::V - Structured data retrieval of perl -V output

SYNOPSIS

use Config::Perl::V;

my $local_config = Config::Perl::V::myconfig ();
print $local_config->{config}{osname};

DESCRIPTION

$conf = myconfig ()

This function will collect the data described in "the hash structure" below, and return that as a hash reference. It optionally accepts an option to include more entries from %ENV. See environment below.

Note that this will not work on uninstalled perls when called with -I/path/to/uninstalled/perl/lib, but it works when that path is in $PERL5LIB or in $PERL5OPT, as paths passed using -I are not known when the -V information is collected.

$conf = plv2hash ($text [, ...])

Convert a sole 'perl -V' text block, or list of lines, to a complete myconfig hash. All unknown entries are defaulted.

$info = summary ([$conf])

Return an arbitrary selection of the information. If no $conf is given, myconfig () is used instead.

$md5 = signature ([$conf])

Return the MD5 of the info returned by summary () without the config_args entry.

If Digest::MD5 is not available, it return a string with only 0's.

The hash structure

The returned hash consists of 4 parts:

build

This information is extracted from the second block that is emitted by perl -V, and usually looks something like

 Characteristics of this binary (from libperl):
   Compile-time options: DEBUGGING USE_64_BIT_INT USE_LARGE_FILES
   Locally applied patches:
	 defined-or
	 MAINT24637
   Built under linux
   Compiled at Jun 13 2005 10:44:20
   @INC:
     /usr/lib/perl5/5.8.7/i686-linux-64int
     /usr/lib/perl5/5.8.7
     /usr/lib/perl5/site_perl/5.8.7/i686-linux-64int
     /usr/lib/perl5/site_perl/5.8.7
     /usr/lib/perl5/site_perl
     .

or

 Characteristics of this binary (from libperl):
   Compile-time options: DEBUGGING MULTIPLICITY
			 PERL_DONT_CREATE_GVSV PERL_IMPLICIT_CONTEXT
			 PERL_MALLOC_WRAP PERL_TRACK_MEMPOOL
			 PERL_USE_SAFE_PUTENV USE_ITHREADS
			 USE_LARGE_FILES USE_PERLIO
			 USE_REENTRANT_API
   Built under linux
   Compiled at Jan 28 2009 15:26:59

This information is not available anywhere else, including %Config, but it is the information that is only known to the perl binary.

The extracted information is stored in 5 entries in the build hash:

osname

This is most likely the same as $Config{osname}, and was the name known when perl was built. It might be different if perl was cross-compiled.

The default for this field, if it cannot be extracted, is to copy $Config{osname}. The two may be differing in casing (OpenBSD vs openbsd).

stamp

This is the time string for which the perl binary was compiled. The default value is 0.

options

This is a hash with all the known defines as keys. The value is either 0, which means unknown or unset, or 1, which means defined.

derived

As some variables are reported by a different name in the output of perl -V than their actual name in %Config, I decided to leave the config entry as close to reality as possible, and put in the entries that might have been guessed by the printed output in a separate block.

patches

This is a list of optionally locally applied patches. Default is an empty list.

environment

By default this hash is only filled with the environment variables out of %ENV that start with PERL, but you can pass the env option to myconfig to get more

my $conf = Config::Perl::V::myconfig ({ env => qr/^ORACLE/ });
my $conf = Config::Perl::V::myconfig ([ env => qr/^ORACLE/ ]);
config

This hash is filled with the variables that perl -V fills its report with, and it has the same variables that Config::myconfig returns from %Config.

inc

This is the list of default @INC.

REASONING

This module was written to be able to return the configuration for the currently used perl as deeply as needed for the CPANTESTERS framework. Up until now they used the output of myconfig as a single text blob, and so it was missing the vital binary characteristics of the running perl and the optional applied patches.

BUGS

Please feedback what is wrong

TODO

* Implement retrieval functions/methods
* Documentation
* Error checking
* Tests

AUTHOR

H.Merijn Brand <h.m.brand@xs4all.nl>

COPYRIGHT AND LICENSE

Copyright (C) 2009-2015 H.Merijn Brand

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