Fork CMS 3.8.3 - XSS Vulnerability

["ITAS Team" <itas.team () itas vn>]

# Exploit Title:        Fork CMS 3.8.3 - XSS Vulnerability
# Vendor:           http://www.fork-cms.com
# Download link:    http://www.fork-cms.com/blog/detail/fork-3.8.4-released
# CVE ID:                       CVE-2014-9470 
# Vulnerability:    Cross-Site Scripting
# Affected version: Fork 3.8.3
# Fixed version:    Fork 3.8.4
# Author:           Le Ngoc Phi - phi.n.le () itas vn & ITAS Team - www.itas.vn

::VULNERABILITY DETAIL::
- Vulnerable parameter:  q_widget
- Vulnerable file:       src/Frontend/Modules/Search/Actions/Index.php
- Vulnerable function:   loadForm()
- Attack vector:
http://forkcms.local/en/search?form=search&q_widget="onmouseover="alert('XSS
')"&submit=Search
- Vulnerable code:
    private function loadForm()
    {
        // create form
        $this->frm = new FrontendForm('search', null, 'get', null, false);

        // could also have been submitted by our widget
        if (!\SpoonFilter::getGetValue('q', null, '')) {
            $_GET['q'] = \SpoonFilter::getGetValue('q_widget', null, '');
        }

        // create elements
        $this->frm->addText(
            'q',
            null,
            255,
            'inputText liveSuggest autoComplete',
            'inputTextError liveSuggest autoComplete'
        );

        // since we know the term just here we should set the canonical url
here
        $canonicalUrl = SITE_URL .
FrontendNavigation::getURLForBlock('Search');
        if (isset($_GET['q']) && $_GET['q'] != '') {
            $canonicalUrl .= '?q=' . $_GET['q'];
        }
        $this->header->setCanonicalUrl($canonicalUrl);
    }

- Fix code: 
private function loadForm()
{
        // create form
        $this->frm = new FrontendForm('search', null, 'get', null, false);
        
        // could also have been submitted by our widget
        if (!\SpoonFilter::getGetValue('q', null, '')) {
                $_GET['q'] = \SpoonFilter::getGetValue('q_widget', null,
'');
        }
        
        // create elements
        $this->frm->addText(
                'q',
                null,
                255,
                'inputText liveSuggest autoComplete',
                'inputTextError liveSuggest autoComplete'
        );
        
        // since we know the term just here we should set the canonical url
here
        $canonicalUrl = SITE_URL .
FrontendNavigation::getURLForBlock('Search');
        if (isset($_GET['q']) && $_GET['q'] != '') {
                $canonicalUrl .= '?q=' .
\SpoonFilter::htmlspecialchars($_GET['q']);
        }
        $this->header->setCanonicalUrl($canonicalUrl);
}

::SOLUTION::
Update to Fork 3.8.4

::TIMELINE::
- 12/25/2014: Detected vulnerability
- 12/25/2014: Inform vendor and the vendor confirmed
- 12/26/2014: Vendor releases patch
- 12/26/2014: ITAS Team publishes information

::REFERENCE::
-
http://www.itas.vn/news/itas-team-found-out-a-cross-site-scripting-vulnerabi
lity-in-fork-cms-70.html
- https://github.com/forkcms/forkcms/issues/1018s
-
https://github.com/forkcms/forkcms/commit/4a7814762adf4f56f932d95146c7e4126d
872114

::COPYRIGHT::
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hereby granted for the electronic redistribution of this information. It is
not to be edited or altered in any way without the express written consent
of ITAS CORP.

::DISCLAIMER::
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Best Regards,
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----------------
ITAS Team

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