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Nortel SSL VPN Web Interface Arbitrary Command Execution Vulnerability
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Secunia Advisory:
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SA17974
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Release Date:
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2005-12-12
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Last Update:
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2005-12-23
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Popularity:
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6,091 views
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Critical:
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Moderately critical
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Impact:
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Cross Site Scripting
System access
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Where:
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From remote
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Solution Status:
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Vendor Patch
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| OS: | Nortel Alteon SSL Accelerator 3.x
Nortel Alteon SSL Accelerator 4.x
Nortel Alteon SSL VPN
Nortel Application Switches (formerly Alteon)
Nortel VPN Gateway 3050
Nortel VPN Gateway 3070
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Description:
Daniel Fabian has reported a vulnerability in Nortel SSL VPN, which can be exploited by malicious people to conduct cross-site scripting attacks and potentially to compromise a user's system.
Input passed to the "a" parameter in "tunnelform.yaws" of the web interface isn't properly sanitised before being returned to the user. This can be exploited to execute arbitrary HTML and script code in a user's browser session in context of an affected site.
It is reportedly possible to execute arbitrary commands on the user's browser by making use of the cryptographically signed Java Applet that is loaded by the web pages, and supplying the commands via a malicious link.
Successful exploitation requires that the user is e.g. tricked into following a malicious link and to logon to the web interface of the VPN after following the link.
The vulnerability has been reported in version 4.2.1.6. Prior versions may also be affected.
Solution:
Update VPN Gateway software to version 5.1.5 or later.
Provided and/or discovered by:
Daniel Fabian, SEC-CONSULT
Changelog:
2005-12-23: Updated list of affected products, "Original Advisory", and "Solution" sections.
Original Advisory:
Nortel Networks:
http://www130.nortelnetworks.com/cgi-...p;DocumentOID=373488&RenditionID=
SEC-CONSULT:
http://www.sec-consult.com/247.html
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About this Secunia Advisory
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Please note: The information that this Secunia Advisory is based on comes from a third party unless stated otherwise.
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