Seo Panel 2.2.0 - Cookie-Rendered Persistent Cross-Site Scripting

'Seo Panel' Cookie-Rendered Persistent XSS Vulnerability (CVE-2010-4331)

Mark Stanislav - mark.stanislav@gmail.com





I. DESCRIPTION

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A vulnerability exists in 'Seo Panel' page rendering which allows for unfiltered, unencrypted content to be presented to a user through two different cookies.



 

II. TESTED VERSION

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2.2.0





III. PoC EXPLOIT

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Alter the value of cookies called 'default_news' or 'sponsors' and then view a site page which includes controllers/index.ctrl.php or controllers/settings.ctrl.php that will render the cookies as they exist on the user's machine.





IV. NOTES 

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* The 'default_news' cookie doesn't require a user to be authenticated whereas 'sponsors' does

* The disclosure date was pushed a full month so that a fix could be released but no update was released yet

* Based on discussions with the developer, they will likely encrypt the cookie contents to prevent this issue





V. SOLUTION

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Upgrade to a release > 2.2.0 when available or otherwise disable cookie rendering.





VI. REFERENCES

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http://www.seopanel.in/

http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2010-4331

http://www.uncompiled.com/2011/01/seo-panel-cookie-rendered-persistent-xss-vulnerability-cve-2010-4331/





VII. TIMELINE

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11/24/2010 - Initial vendor disclosure

11/25/2010 - Vendor response and commitment to fix

11/25/2010 - Reply to vendor detailing potential fixes and an adjusted public disclosure date

11/25/2010 - Vendor response confirming desired public disclosure date and agreement to patch method

01/15/2011 - Public disclosure