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| | vBulletin Input Validation Flaws in 'memberlist' and 'member2' Allow Cross-Site Scripting Attacks |
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Categorie: Vulnerability
Posted: 2002-11-27 by ReCall
Views: 315
Source: Click here
| Current Rating: Not rated
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| | Details |
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Description: Two input validation vulnerabilities were reported in the vBulletin forum software in the 'memberlist.php' and 'member2.php' scripts. A remote user can conduct cross-site scripting attacks against vBulletin users.
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 site running the vBulletin 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.
A demonstration exploit URL is provided:
memberlist.php?s=23c37cf1af5d2ad05f49361b0407ad9e&what=">"javascript:alert(document.cookie)
In a separate message, it was reported by Sp.IC that another flaw resides in the 'member2.php' script in the 'perpage' variable. A demonstration exploit URL is provided:
member2.php?s=[Session]&action=viewsubscription&perpage=[Script Code]
Impact: A remote user can access the target user's cookies (including authentication cookies), if any,
associated with the site running vBulletin, 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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