F5 FirePass SSL VPN Input Validation Flaw Permits Cross-Site URL Redirection Attacks
SecurityTracker Alert ID: 1027688|
SecurityTracker URL: http://securitytracker.com/id/1027688
(Links to External Site)
Date: Oct 22 2012
Modification of user information|
Exploit Included: Yes |
Version(s): SSL VPN 4xxx Series|
A vulnerability was reported in F5 FirePass SSL VPN. A remote user can conduct cross-site URL redirection attacks.|
A remote user can create a specially crafted URL that, when loaded by a target user, will cause the target user's browser to be redirected to an arbitrary URL.
The 'refreshURL' parameter of 'my.activation.cns.php3' is affected.
A demonstration exploit URL is provided:
The vendor was notified on March 31, 2012.
Aung Khant, YGN Ethical Hacker Group, Myanmar, reported this vulnerability.
A remote user can cause the target user's browser to be redirected to an arbitrary URL.|
No solution was available at the time of this entry.|
Vendor URL: f5.com/ (Links to External Site)
Input validation error|
Source Message Contents
Subject: [Full-disclosure] F5 FirePass SSL VPN 4xxx Series | Arbitrary URL Redirection|
F5 FirePass SSL VPN is vulnerable to Open URL Redirection.
F5 FirePass SSL VPN provides secure remote access to enterprise
applications and data for users over any device or network while
protecting your corporate. (See
3. VULNERABILITY DESCRIPTION
F5 FirePass SSL VPN contains a flaw that allows a remote cross site
redirection attack. This flaw exists because the application does not
validate the "refreshURL" parameter upon submission to the
"my.activation.cns.php3" script. This could allow a user to create a
specially crafted URL, that if clicked, would redirect a victim from
the intended legitimate web site to an arbitrary web site of the
4. VERSIONS AFFECTED
We have not been informed of the fix.
We believe this issue should be fixed by the time of releasing our advisory.
F5 Networks, Inc.
This vulnerability was discovered by Aung Khant, http://yehg.net, YGN
Ethical Hacker Group, Myanmar.
9. DISCLOSURE TIME-LINE
2012-03-31: notified vendor
2012-04-04: vendor acknowledged
2012-10-20: vulnerability disclosed
Original Advisory URL:
OWASP Top 10 2010 - A 10:
SANS Top 25 - Rank 23: http://cwe.mitre.org/top25/#CWE-601
YGN Ethical Hacker Group
Our Lab | http://yehg.net/lab
Our Directory | http://yehg.net/hwd
Full-Disclosure - We believe in it.
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