XSS vulnerabilities in Croogo CMS 1.3

Summary

Croogo CMS is prone to HTML-injection vulnerabilities because it fails to properly sanitize user-supplied input.

Details

Vulnerable Software: 1.3
Full disclosure Date: 2010-06-14
Last Update: 2010-05-10
Critical: Low
Impact: HTML injection
           Session hijack
           Denial of service
           Code execution

Solution Status: Vendor informed and patch submitted to public repository

BACKGROUND
======================= 

Croogo is a content management system gaining popularity rapidily in the CAKEPHP community.

DESCRIPTION
======================= 

Croogo CMS is prone to an HTML-injection vulnerability because it fails to properly sanitize user-supplied.

Successful exploits will allow attacker-supplied HTML and script code to run in the context of the affected browser, potentially allowing the attacker to steal cookie-based authentication credentials or to control how the site is rendered to the user. Other attacks are also possible.

EXPLOIT / POC
======================= 

Attackers can exploit this issue with a web browser sending malicious code through the field ‘name’ located in the user registration form (http://site/users/add) or the field ‘data[Comment][body]’ in the “add a comment” form to comment on a post (http://site/comments/add/).

This time the field ‘data[Comment][body]’ gets sanitized correctly but Tipsy, a Javascript library in charge of creating the tooltips, decodes again the stored sanitized string and it allows html injection in the admin panel.

WORKAROUND
======================= 

Upgrade to Croogo 1.3.1 or apply patch Croogo’s public repository

DISCLOSURE TIMELINE
======================= 

2010/05/08 – Vulnerability discovered
2010/05/08 – Vendor contacted
2010/05/1 2 – Patch submitted to Croogo’s public source code repositories
2010/06/14 – Full disclosure

REFERENCES
======================= 

Croogo CMS – Croogo CMS Official website
Croogo on GitHub – Croogo GitHub
Websec’s advisory permalink – http://websec.ca/advisories/view/ws10-08-croogo_cms_1.3_xss_vulnerabilities

 

calderpwn

Infosec consultant | Software dev | Open Source contributor | Speaker

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