Layered Defense Research Advisory: Juniper Netscreen Firewall Cross-Site-Scripting (XSS) event log injection
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Layered Defense Research Advisory 1 October 2008
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1) Affected Product
Juniper Netscreen Firewall
ScreenOS version 5.4.0r9.0
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2) Severity Rating:
Low - Moderate
Impact: Potential system compromises but requires user interaction.
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3) Description of Vulnerability
A Cross-Site Scripting (XSS) Injection vulnerability was discovered within the
Juniper Netscreen firewall NetOS version 5.4.0r9.0. The vulnerability is caused
by failure to validate input from the web interface login, and telnet session
login. This makes it possible for an attacker to inject javascript as part of
the user name during login. The javascript is then stored in the device event
logs. When the event logs are viewed within the Netscreen web console the
javascript is executed. A successful attack would allow an attacker to run
JavaScript on the computer system connecting to the netscreen web management
console which could lead to system compromise.
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4) Solution
Upgrade to ScreenOS versions 5.4r10, 6.0r6, 6.1r2, and later. If unsure if your
product is vulnerable it is recommended that you contact the vendor.
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5) Time Table:
04/07/2008 Reported Vulnerability to Vendor.
04/23/2008 Vendor acknowledged the vulnerability
10/01/2008 Vendor advisory published
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6) Credits Discovered by Deral Heiland, www.LayeredDefense.com
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7) Reference
https://www.juniper.net/alerts/viewalert.jsp?actionBtn=Search&txtAlertNumber=PSN-2008-09-009&viewMode=view
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8) About Layered Defense Layered Defense, Is a group of security professionals
that work together on ethical Research,
Testing and Training within the information security arena.
http://www.layereddefense.com
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