/ 
CGI-Session-3.4
/ CGI::Session::Serialize::Default
Security Advisories (3)
CVE-2006-1279 (2006-03-19)

CGI::Session 4.03-1 allows local users to overwrite arbitrary files via a symlink attack on temporary files used by (1) Driver::File, (2) Driver::db_file, and possibly (3) Driver::sqlite.

CPANSA-CGI-Session-2006-01 (2006-04-06)

possible SQL injection attack

CVE-2026-56016 (2026-07-01)

CGI::Session::ID::md5 versions before 4.49 for Perl generate predictable session ids from low-entropy sources. The generate_id method builds the session id from a MD5 digest of the process id, the epoch time, and the built-in rand() function. All three are predictable, low-entropy sources: the PID is drawn from a small range, the epoch time can be guessed or read from the HTTP Date header, and Perl's rand() is unsuitable for security purposes because it is predictable and reversible. An attacker who predicts a session id can impersonate the corresponding session and bypass authentication.

NAME

CGI::Session::Serialize::Default - default serializer for CGI::Session

SYNOPSIS

use CGI::Session qw/-api3/;
$session = new CGI::Session("serializer:Default", undef, \%attrs);

DESCRIPTION

This library is used by CGI::Session driver to serialize session data before storing it in disk.

METHODS

freeze()

receives two arguments. First is the CGI::Session driver object, the second is the data to be stored passed as a reference to a hash. Should return true to indicate success, undef otherwise, passing the error message with as much details as possible to $self->error()

thaw()

receives two arguments. First being CGI::Session driver object, the second is the string to be deserialized. Should return deserialized data structure to indicate successs. undef otherwise, passing the error message with as much details as possible to $self->error().

WARNING

If you want to be able to store objects, consider using CGI::Session::Serialize::Storable or CGI::Session::Serialize::FreezeThaw instead.

COPYRIGHT

Copyright (C) 2002 Sherzod Ruzmetov. All rights reserved.

This library is free software. It can be distributed under the same terms as Perl itself.

AUTHOR

Sherzod Ruzmetov <sherzodr@cpan.org>

All bug reports should be directed to Sherzod Ruzmetov <sherzodr@cpan.org>.

SEE ALSO