Security Advisories (7)
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-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-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-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

perlglob.bat - a more capable perlglob.exe replacement

SYNOPSIS

@perlfiles = glob  "..\\pe?l/*.p?";
print <..\\pe?l/*.p?>;

# more efficient version
> perl -MFile::DosGlob=glob -e "print <../pe?l/*.p?>"

DESCRIPTION

This file is a portable replacement for perlglob.exe. It is largely compatible with perlglob.exe (the Microsoft setargv.obj version) in all but one respect--it understands wildcards in directory components.

It prints null-separated filenames to standard output.

For details of the globbing features implemented, see File::DosGlob.

While one may replace perlglob.exe with this, usage by overriding CORE::glob with File::DosGlob::glob should be much more efficient, because it avoids launching a separate process, and is therefore strongly recommended. See perlsub for details of overriding builtins.

AUTHOR

Gurusamy Sarathy <gsar@activestate.com>

SEE ALSO

perl

File::DosGlob