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perl-5.27.11
⭐ Starred 2013 / Encode::CN
Security Advisories (7)
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-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-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-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.

NAME

Encode::CN - China-based Chinese Encodings

SYNOPSIS

use Encode qw/encode decode/; 
$euc_cn = encode("euc-cn", $utf8);   # loads Encode::CN implicitly
$utf8   = decode("euc-cn", $euc_cn); # ditto

DESCRIPTION

This module implements China-based Chinese charset encodings. Encodings supported are as follows.

Canonical   Alias		Description
--------------------------------------------------------------------
euc-cn      /\beuc.*cn$/i	EUC (Extended Unix Character)
        /\bcn.*euc$/i
            /\bGB[-_ ]?2312(?:\D.*$|$)/i (see below)
gb2312-raw			The raw (low-bit) GB2312 character map
gb12345-raw			Traditional chinese counterpart to 
              GB2312 (raw)
iso-ir-165			GB2312 + GB6345 + GB8565 + additions
MacChineseSimp                GB2312 + Apple Additions
cp936				Code Page 936, also known as GBK 
              (Extended GuoBiao)
hz				7-bit escaped GB2312 encoding
--------------------------------------------------------------------

To find how to use this module in detail, see Encode.

NOTES

Due to size concerns, GB 18030 (an extension to GBK) is distributed separately on CPAN, under the name Encode::HanExtra. That module also contains extra Taiwan-based encodings.

BUGS

When you see charset=gb2312 on mails and web pages, they really mean euc-cn encodings. To fix that, gb2312 is aliased to euc-cn. Use gb2312-raw when you really mean it.

The ASCII region (0x00-0x7f) is preserved for all encodings, even though this conflicts with mappings by the Unicode Consortium.

SEE ALSO

Encode