Fortinet FortiOS Input Validation Flaw in Web Proxy Disclaimer Response Lets Remote Users Conduct Cross-Site Scripting Attacks
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SecurityTracker Alert ID: 1039741 |
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SecurityTracker URL: http://securitytracker.com/id/1039741
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CVE Reference:
CVE-2017-7739
(Links to External Site)
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Date: Nov 7 2017
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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 Vendor Confirmed: Yes
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Version(s): 5.2.0 - 5.2.11, 5.4.0 - 5.4.5, 5.6.0
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Description:
A vulnerability was reported in Fortinet FortiOS. A remote user can conduct cross-site scripting attacks.
The web proxy disclaimer response pages do not properly filter HTML code from user-supplied input before displaying the 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 Fortinet FortiOS interface 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.
"usd AG" and "Serge Ivanov of Payvision BV" reported this vulnerability.
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Impact:
A remote user can access the target user's cookies (including authentication cookies), if any, associated with the Fortinet FortiOS interface, access data recently submitted by the target user via web form to the interface, or take actions on the interface acting as the target user.
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Solution:
The vendor has issued a fix (5.2.12, 5.4.6, 5.6.1).
The vendor advisory is available at:
https://fortiguard.com/psirt/FG-IR-17-168
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Vendor URL: fortiguard.com/psirt/FG-IR-17-168 (Links to External Site)
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Cause:
Input validation error
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Message History:
None.
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Source Message Contents
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Subject: https://fortiguard.com/psirt/FG-IR-17-168
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