IBM HTTP Server (IHS) Lack of Input Validation in Expect Header May Permit Cross-Site Scripting Attacks
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SecurityTracker Alert ID: 1016569
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SecurityTracker URL: http://securitytracker.com/id?1016569
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CVE Reference: CVE-2006-3918
(Links to External Site)
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Updated: Aug 11 2006
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Original Entry Date: Jul 25 2006
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Impact: Disclosure of authentication information, Disclosure of user information, Execution of arbitrary code via network, Modification of user information
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Fix Available: Yes
Exploit Included: Yes
Vendor Confirmed: Yes
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Version(s): prior to 2.0.47.1, also 1.3.x
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Description: A vulnerability was reported in IBM HTTP Server (IHS). A remote user can conduct cross-site scripting attacks.
The server does not properly filter HTML code from user-supplied input in the HTTP Expect header before displaying the input. A
remote user can creat a specially crafted value that, when submitted 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 IBM HTTP Server (IHS) software 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.
The Apache web server is also affected.
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Impact: A remote user can access the target user's cookies (including authentication cookies), if any, associated with the site running the
IBM HTTP Server (IHS) software, 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.
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Solution: The vendor has issued a fix (PK25355 2.0.47.1 and PK27875 1.3.28.1).
The IBM advisories are available at:
http://www-1.ibm.com/support/docview.wss?uid=swg1PK24631
http://www-1.ibm.com/support/docview.wss?uid=swg24013080
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Vendor URL: www-1.ibm.com/support/docview.wss?uid=swg1PK24631 (Links to External Site)
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Cause: Input validation error
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Underlying OS: Linux (Any), UNIX (AIX), UNIX (HP/UX), UNIX (Solaris - SunOS), Windows (Any)
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Message History:
This archive entry has one or more follow-up message(s) listed below.
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Source Message Contents
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Date: Tue, 25 Jul 2006 14:07:57 -0400
Subject: IBM HTTP Server (IHS) vulnerability
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PK24631: HTTP EXPECT HEADER VALUE CAN BE ECHOED TO BROWSER UNESCAPED
http://www-1.ibm.com/support/docview.wss?uid=swg1PK24631
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