/ 
perl-5.40.5
⭐ Starred 2013 / Amiga::ARexx
Security Advisories (3)
CVE-2026-19487 (2026-08-13)

Perl versions from 5.9.4 before 5.41.9 produce incorrect regular expression match results when a stale failure flag ends the Aho-Corasick prescan early in S_find_byclass. The prescan walks the subject for positions where the full pattern could match, and the engine tries it from the leftmost one recorded. A failing transition sets the failed flag, and a later successful transition does not clear it, so the prescan reads the stale flag as a failure and stops before it can record a candidate that starts earlier. It takes a subject where one candidate is recorded and a later character then forces a fallback through a fail link that succeeds. Example: "ABCDE" =~ m/ABCF|BCDE|C/; # matches C at offset 2, not BCDE "ABCDE" =~ m/ABCF|BCDE|C(G)/; # no match, BCDE missed An alternation like this can miss input it should match, or match it on the wrong branch, so an access or filtering decision made from the result can be wrong.

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-2026-15534 (2026-08-09)

Perl versions through 5.45.1 have out-of-bounds heap reads and writes during regular expression matching via an undersized superlinear cache in S_regmatch. The regex engine's superlinear cache holds one bit per subject position for each participating WHILEM node, so the bit count is the subject length plus one times the number of nodes. Nothing checks that product for positive overflow of the signed 32-bit count: a 286331153 byte subject matched against a pattern with 15 participating nodes stores the count as 14, leaving a two byte cache. The cache is then indexed from the real match position and node number, so reads go past the end of the allocation, and on failure CACHEsayNO sets a bit past it. A caller that matches an attacker controlled subject of this size against a pattern of this shape can crash the process or corrupt heap memory.

NAME

Amiga::ARexx - Perl extension for ARexx support

ABSTRACT

This a perl class / module to enable you to use ARexx with your perlscript. Creating a function host or executing scripts in other hosts. The API is loosley modeled on the python arexx module supplied by with AmigaOS4.1

SYNOPSIS

# Create a new host

use Amiga::ARexx;
my $host = Amiga::ARexx->new('HostName' => "PERLREXX" );

# Wait for and process rexxcommands

my $alive = 1;

while ($alive)
{
    $host->wait();
    my $msg = $host->getmsg();
    while($msg)
    {
        my $rc = 0;
        my $rc2 = 0;
        my $result = "";

        print $msg->message . "\n";
        given($msg->message)
        {
            when ("QUIT")
            {
                $alive = 0;
                $result = "quitting!";
            }
            default {
                $rc = 10;
                $rc2 = 22;
            }
        }
        $msg->reply($rc,$rc2,$result);

        $msg = $host->getmsg();
    }

}

# Send a command to a host

my $port = "SOMEHOST";
my $command = "SOMECOMMAND";
my ($rc,$rc2,$result) = Amiga::ARexx->DoRexx($port,$command);

DESCRIPTION

The interface to the arexx.class in entirely encapsulated within the perl class, there is no need to access the low level methods directly and they are not exported by default.

Amiga::ARexx METHODS

new

my $host = Amiga::ARexx->new( HostName => "PERLREXX");

Create an ARexx host for your script / program.

HostName

The HostName for the hosts command port. This is madatory, the program will fail if not provided.

wait

$host->wait('TimeOut' => $timeoutinusecs );

Wait for a message to arive at the port.

TimeOut

optional time out in microseconds.

getmsg

$msg = $host->getmsg();

Fetch an ARexx message from the host port. Returns an objrct of class Amiga::ARexx::Msg

signal

$signal = $host->signal()

Retrieve the signal mask for the host port for use with Amiga::Exec Wait()

DoRexx

($rc,$rc2,$result) = DoRexx("desthost","commandstring");

Send the "commandstring" to host "desthost" for execution. Commandstring might be a specific command or scriptname.

Amiga::ARexx::Msg METHODS

message

$m = $msg->message();

Retrieve the message "command" as a string;

reply

$msg->reply($rc,$rc2,$result)

Reply the message returning the results of any command. Set $rc = 0 for success and $result to the result string if appropriate.

Set $rc to non zero for error and $rc2 for an additional error code if appropriate.

setvar

$msg->setvar($varname,$value)

Set a variable in the language context sending this message.

getvar

$value = $msg->getvar($varname)

Get the value of a variable in the language context sending this message.

EXPORT

None by default.

Exportable constants

None

AUTHOR

Andy Broad <andy@broad.ology.org.uk>

COPYRIGHT AND LICENSE

Copyright (C) 2013 by Andy Broad.