I. VULNERABILITY

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Reflected XSS Attacks vulnerabilities in Symantec WEB Gateway 5.1.1.24




II. BACKGROUND

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Symantec Corporation is an American computer security, backup and
availability solutions software corporation headquartered in Mountain
View, California, United States. It is a Fortune 500 company and a
member of the S&P 500 stock market index



III. DESCRIPTION

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Has been detected a Reflected XSS vulnerability in Symantec Web Gateway.

The code injection is done through the parameter "operand[]" in the
page "/spywall/blacklist.php?variable[]=&operator[]=&operand[]="



IV. PROOF OF CONCEPT

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The application does not validate the parameter "operand[]" correctly.



https://10.200.210.144/spywall/blacklist.php?variable[]=&operator[]=&operand[]=jjjj'><script>alert(document.cookie);</script>



V. BUSINESS IMPACT

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An attacker can execute arbitrary HTML or script code in a targeted

user's browser, that allows the execution of arbitrary HTML/script
code to be executed in the context of the victim user's browser
allowing Cookie Theft/Session Hijacking, thus enabling full access the
box.





VI. SYSTEMS AFFECTED

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Tested Symantec Web Gateway Version: 5.1.1.24





VII. SOLUTION

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All data received by the application and can be modified by the user,

before making any kind of transaction with them must be validated

http://www.symantec.com/security_response/securityupdates/detail.jsp?fid=security_advisory&pvid=security_advisory&year=&suid=20140210_00

By William Costa

william.costa@gmail.com