bin/57322: CGI.pm in ports/japanese/perl5 has a cross-site scripting vulneravility

[IIJIMA Hiromitsu]

>Number:         57322
>Category:       bin
>Synopsis:       CGI.pm in ports/japanese/perl5 has a cross-site scripting vulneravility
>Confidential:   no
>Severity:       critical
>Priority:       high
>Responsible:    freebsd-bugs
>State:          open
>Quarter:        
>Keywords:       
>Date-Required:
>Class:          sw-bug
>Submitter-Id:   current-users
>Arrival-Date:   Sun Sep 28 09:50:02 PDT 2003
>Closed-Date:
>Last-Modified:
>Originator:     IIJIMA Hiromitsu
>Release:        FreeBSD 4.7-RELEASE-p3 i386
>Organization:
DENNOU GEDOU GAKKAI, N. D. D. http://www.dennougedougakkai-ndd.org
>Environment:
System: FreeBSD sodans.usata.org 4.7-RELEASE-p3 FreeBSD 4.7-RELEASE-p3 #0: Wed Jan 22 14:50:19 JST 2003 root at www.my.domain:/usr/src/sys/compile/RENTALv6 i386

Userland is upgraded to -p16, while the kernel is still -p3.

>Description:
	A cross-site scripting vulnerability is reported in CGI.pm.
	All of the following are affected:
		- 4.x base system's perl 5.005_03
		- ports/japanese/perl5 (5.005_03 with Japanese patch)
		- ports/lang/perl5 (5.6.1)
		- ports/lang/perl5.8 (5.8.0)

	I sent separate PR for 4.x base system and will send another
	for lang/perl5*.

>How-To-Repeat:
	See the exploit code at:
	http://marc.theaimsgroup.com/?l=bugtraq&m=105880349328877&w=2

>Fix:
	1. Currently, the only perfect solution is to replace CGI.pm with
	   a newer one.

	2. It is safe to avoid using CGI.pm's start_form() until ports/57302
	   is accepted.

	3. Just installing ports/www/p5-CGI.pm or latest version at CPAN does
	   not solve the problem, since jperl finds the old CGI.pm in standard
	   perl distribution, before searching site_perl folders where newer
	   CGI.pm is installed.
	   This problem will be solved if ports/57302 is accepted.

	4. If you do want to use start_form(), either
		- all local users are urged to make sure by themselves that
		  newer CGI.pm will be used, by using -I command-line option
		  or manipulating @INC array.
		- the administrator may ensure using newer CGI.pm by linking
		  newer one to the old one, namely,
			% su
			# cd /usr/local/lib/perl5/5.00503
			# ln -sf ../site_perl/5.005/CGI.pm .
>Release-Note:
>Audit-Trail:
>Unformatted: