Security Advisories (2)
CVE-2024-58134 (2025-05-03)

Mojolicious versions from 0.999922 for Perl uses a hard coded string, or the application's class name, as a HMAC session secret by default. These predictable default secrets can be exploited to forge session cookies. An attacker who knows or guesses the secret could compute valid HMAC signatures for the session cookie, allowing them to tamper with or hijack another user's session.

CVE-2024-58135 (2025-05-03)

Mojolicious versions from 7.28 for Perl may generate weak HMAC session secrets. When creating a default app with the "mojo generate app" tool, a weak secret is written to the application's configuration file using the insecure rand() function, and used for authenticating and protecting the integrity of the application's sessions. This may allow an attacker to brute force the application's session keys.

NAME

Mojo::IOLoop::Server - Non-blocking TCP and UNIX domain socket server

SYNOPSIS

use Mojo::IOLoop::Server;

# Create listen socket
my $server = Mojo::IOLoop::Server->new;
$server->on(accept => sub ($server, $handle) {...});
$server->listen(port => 3000);

# Start and stop accepting connections
$server->start;
$server->stop;

# Start reactor if necessary
$server->reactor->start unless $server->reactor->is_running;

DESCRIPTION

Mojo::IOLoop::Server accepts TCP/IP and UNIX domain socket connections for Mojo::IOLoop.

EVENTS

Mojo::IOLoop::Server inherits all events from Mojo::EventEmitter and can emit the following new ones.

accept

$server->on(accept => sub ($server, $handle) {...});

Emitted for each accepted connection.

ATTRIBUTES

Mojo::IOLoop::Server implements the following attributes.

reactor

my $reactor = $server->reactor;
$server     = $server->reactor(Mojo::Reactor::Poll->new);

Low-level event reactor, defaults to the reactor attribute value of the global Mojo::IOLoop singleton. Note that this attribute is weakened.

METHODS

Mojo::IOLoop::Server inherits all methods from Mojo::EventEmitter and implements the following new ones.

generate_port

my $port = Mojo::IOLoop::Server->generate_port;

Find a free TCP port, primarily used for tests.

handle

my $handle = $server->handle;

Get handle for server, usually an IO::Socket::IP object.

is_accepting

my $bool = $server->is_accepting;

Check if connections are currently being accepted.

listen

$server->listen(port => 3000);
$server->listen({port => 3000});

Create a new listen socket. Note that TLS support depends on IO::Socket::SSL (2.009+).

These options are currently available:

address
address => '127.0.0.1'

Local address to listen on, defaults to 0.0.0.0.

backlog
backlog => 128

Maximum backlog size, defaults to SOMAXCONN.

fd
fd => 3

File descriptor with an already prepared listen socket.

path
path => '/tmp/myapp.sock'

Path for UNIX domain socket to listen on.

port
port => 80

Port to listen on, defaults to a random port.

reuse
reuse => 1

Allow multiple servers to use the same port with the SO_REUSEPORT socket option.

single_accept
single_accept => 1

Only accept one connection at a time.

tls
tls => 1

Enable TLS.

tls_ca
tls_ca => '/etc/tls/ca.crt'

Path to TLS certificate authority file.

tls_cert
tls_cert => '/etc/tls/server.crt'
tls_cert => {'mojolicious.org' => '/etc/tls/mojo.crt'}

Path to the TLS cert file, defaults to a built-in test certificate.

tls_key
tls_key => '/etc/tls/server.key'
tls_key => {'mojolicious.org' => '/etc/tls/mojo.key'}

Path to the TLS key file, defaults to a built-in test key.

tls_options
tls_options => {SSL_alpn_protocols => ['foo', 'bar'], SSL_verify_mode => 0x00}

Additional options for IO::Socket::SSL.

port

my $port = $server->port;

Get port this server is listening on.

start

$server->start;

Start or resume accepting connections.

stop

$server->stop;

Stop accepting connections.

SEE ALSO

Mojolicious, Mojolicious::Guides, https://mojolicious.org.