F5 FirePass Input Validation Hole in 'download_plugin.php3' Permits Cross-Site Scripting Attacks
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SecurityTracker Alert ID: 1018937 |
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SecurityTracker URL: http://securitytracker.com/id/1018937
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CVE Reference:
CVE-2007-5979
(Links to External Site)
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Updated: Feb 17 2008
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Original Entry Date: Nov 13 2007
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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 Exploit Included: Yes
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Version(s): 5.4 - 5.5.2, 6.0 - 6.0.1; FirePass 4100 SSL VPN
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Description:
A vulnerability was reported in F5 FirePass. A remote user can conduct cross-site scripting attacks.
The 'download_plugin.php3' script does not properly filter HTML code from user-supplied input in the 'backurl' parameter 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 F5 FirePass device and will run in the security context of that device. As a result, the code will be able to access the target user's cookies (including authentication cookies), if any, associated with the device, access data recently submitted by the target user via web form to the device, or take actions on the device acting as the target user.
Jan Fry and Adrian Pastor of ProCheckUp Ltd. reported this vulnerability.
The original advisory is available at:
http://www.procheckup.com/Vulnerability_PR07-13.php
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Impact:
A remote user can access the target user's cookies (including authentication cookies), if any, associated with the device running the F5 FirePass software, access data recently submitted by the target user via web form to the device, or take actions on the device acting as the target user.
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Solution:
The vendor has issued a fix (see SOL7498).
The F5 advisory is available at:
https://support.f5.com/kb/en-us/solutions/public/7000/400/sol7498.html
[Editor's note: The vendor advisory is not publicly available.]
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Vendor URL: www.f5.com/products/firepass/ (Links to External Site)
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Cause:
Input validation error
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Underlying OS:
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Message History:
None.
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Source Message Contents
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Date: 12 Nov 2007 23:04:15 -0000
Subject: PR07-13: Cross-site Scripting / HTML injection on F5 FirePass
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Date Found: 19th June 2007
Successfully tested on: version 5.5.2
F5 Networks has confirmed the following versions to be vulnerable:
FirePass versions 5.4 - 5.5.2
FirePass versions 6.0 - 6.0.1
Description:
F5 Networks FirePass 4100 SSL VPN is vulnerable to XSS within the "backurl" parameter processed by the "download_plugin.php3" server-side
script.
No authentication is required to exploit this vulnerability.
Consequences:
An attacker may be able to cause execution of malicious scripting code in the browser of a user who visits a specially-crafted URL
to an F5 Firepass device, or visits a malicious page that makes a request to such URL. Such code would run within the security context
of the target domain.
This type of attack can result in non-persistent defacement of the target site, or the redirection of confidential information (i.e.
admin session IDs) to unauthorised third parties.
Severity: Medium/High
Credits: Jan Fry [jan.fry [at] procheckup.com] and Adrian Pastor [adrian.pastor [at] procheckup.com] of ProCheckUp Ltd
Fix:
F5 Networks has issued SOL7498:
https://support.f5.com/kb/en-us/solutions/public/7000/400/sol7498.html
More information, including proof of concept can be found on:
http://www.procheckup.com/Vulnerability_PR07-13.php
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