Phishing, Insecure Configuration, XSS, Cross Site Scripting in login.silverlight.net/login/signin.aspx, CWE-79, CAPEC-86, DORK, GHDB
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Netsparker - Scan Report Summary
TARGET URL
https://login.silverlight.net/login/signin.as...
DORK DATE
1/29/2011 5:18:24 PM
REPORT DATE
2/28/2011 9:43:51 PM
DORK DURATION
00:00:02
Total Requests
1
Average Speed
1
req/sec.
6
identified
2
confirmed
0
critical
1
informational
SCAN SETTINGS
Scan Settings
PROFILE
Previous Settings
DORK TESTS
Cross-site Scripting
Authentication
Scheduled
VULNERABILITIES
Vulnerabilities
IMPORTANT
33 %
LOW
50 %
INFORMATION
17 %
Cross-site Scripting
Cross-site Scripting
1
TOTAL
IMPORTANT
XSS (Cross-site Scripting) allows an attacker to execute a dynamic script (Javascript, VbScript) in the context of the application. This allows several different attack opportunities, mostly hijacking the current session of the user or changing the look of the page by changing the HTML on the fly to steal the user's credentials. This happens because the input entered by a user has been interpreted as HTML/Javascript/VbScript by the browser.
XSS targets the users of the application instead of the server. Although this is a limitation, since it allows attackers to hijack other users' session, an attacker might attack an administrator to gain full control over the application.
Impact
There are many different attacks that can be leveraged through the use of XSS, including:
Hi-jacking users' active session
Changing the look of the page within the victims browser.
Mounting a successful phishing attack.
Intercept data and perform man-in-the-middle attacks.
Remedy
The issue occurs because the browser interprets the input as active HTML, Javascript or VbScript. To avoid this, all input and output from the application should be filtered. Output should be filtered according to the output format and location. Typically the output location is HTML. Where the output is HTML ensure that all active content is removed prior to its presentation to the server.
Prior to sanitizing user input, ensure you have a pre-defined list of both expected and acceptable characters with which you populate a white-list. This list needs only be defined once and should be used to sanitize and validate all subsequent input.
There are a number of pre-defined, well structured white-list libraries available for many different environments, good examples of these include, OWASP Reform and Microsoft Anti Cross-site Scripting libraries are good examples.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml">
<head><title> Sign In : </title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta name="description" content="Microsoft portal site for the Silverlight development community. Download Silverlight, post to the forums, read Silverlight blogs and learn about Silverlight." /><meta name="keywords" content="Silverlight, RIA, Web, HTML, Developer, Internet, Microsoft, Web Services, Visual Studio .NET" /><meta name="author" content="Microsoft Silverlight" /><meta http-equiv="X-UA-Compatible" content="IE=8" /><link rel="shortcut icon" type="image/ico" href="../favicon.ico" /><link rel="stylesheet" media="all" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-screen" /><link rel="stylesheet" media="all" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-modal" /><link rel="stylesheet" media="print" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-print" /> <script type="text/javascript" src="/resources/script/jquery-1.3.2.min.js"></script> <script type="text/javascript" src="/resources/script/core.min.js"></script> </head>
<h1 class="nomargin bump_bottom">Sign In to the Silverlight Community</h1> <div class="frm_common wrapper_frm_join"> <span class="frm_common_top"></span> <div class="frm_common_mid frm_common_mid_liveauth">
<div class="login_live_left"> <div class="login_image login_live"></div> <p class="no_lines"><a href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343124&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3D%27%22%20ns%3Dnetsparker(0x0000C7)%20&lc=1033&id=265631">Sign in</a> using your Windows Live ID. First use of Windows Live ID requires a one-time step to link an existing or new Silverlight.NET website account.</p> <a id="idPPScarab" href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343124&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3D%27%22%20ns%3Dnetsparker(0x0000C7)%20&lc=1033&id=265631"><img src="https://www.passportimages.com/1033/signin.gif" class="PassportSignIn" alt="Sign in to Windows Live ID" style="border-style:none" id="idSI"/></a> </div> <div class="login_forms_right"> <div class="login_image login_forms"></div> <p class="no_lines">Sign in using your Silverlight.NET website account. Use this option if you do not have or do not want to use a Windows Live ID.<br /></p> <p class="no_lines"><input type="submit" name="ctl00$mainMiddle$loginForm$Button2" value="Sign In" onclick="javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("ctl00$mainMiddle$loginForm$Button2", "", true, "", "", false, false))" id="ctl00_mainMiddle_loginForm_Button2" class="common_button" /></p> </div> <div class="clear"></div>
</div> <span class="frm_common_bot"></span> </div> <p class="link_not_member">If you would rather use Windows Live ID to sign-in, click <a href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343124&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3D%27%22%20ns%3Dnetsparker(0x0000C7)%20&lc=1033&id=265631">here</a>.</p> <p class="link_not_member">Not a member yet? <a href="https://login.silverlight.net/login/createuser.aspx?returnurl='" ns=netsparker(0x0000C7) ">Click here to Join</a></p>
A Cookie was not marked as secure and transmitted over HTTPS. This means the cookie could potentially be stolen by an attacker who can successfully intercept and decrypt the traffic or following a successful MITM (Man in the middle) attack.
Impact
This cookie will be transmitted over a HTTP connection, therefore if this cookie is important (such as a session cookie) an attacker might intercept it and hijack a victim's session. If the attacker can carry out a MITM attack, he/she can force victim to make a HTTP request to steal the cookie.
Actions to Take
See the remedy for solution.
Mark all cookies used within the application as secure. (If the cookie is not related to authentication or does not carry any personal information you do not have to mark it as secure.))
Remedy
Mark all cookies used within the application as secure.
Required Skills for Successful Exploitation
To exploit this issue, the attacker needs to be able to intercept traffic. This generally requires local access to the web server or victim's network. Attackers need to be understand layer 2, have physical access to systems either as way points for the traffic, or locally (have gained access to) to a system between the victim and the web server.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml">
<head><title> Sign In : </title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta name="description" content="Microsoft portal site for the Silverlight development community. Download Silverlight, post to the forums, read Silverlight blogs and learn about Silverlight." /><meta name="keywords" content="Silverlight, RIA, Web, HTML, Developer, Internet, Microsoft, Web Services, Visual Studio .NET" /><meta name="author" content="Microsoft Silverlight" /><meta http-equiv="X-UA-Compatible" content="IE=8" /><link rel="shortcut icon" type="image/ico" href="../favicon.ico" /><link rel="stylesheet" media="all" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-screen" /><link rel="stylesheet" media="all" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-modal" /><link rel="stylesheet" media="print" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-print" /> <script type="text/javascript" src="/resources/script/jquery-1.3.2.min.js"></script> <script type="text/javascript" src="/resources/script/core.min.js"></script> </head>
<h1 class="nomargin bump_bottom">Sign In to the Silverlight Community</h1> <div class="frm_common wrapper_frm_join"> <span class="frm_common_top"></span> <div class="frm_common_mid frm_common_mid_liveauth">
<div class="login_live_left"> <div class="login_image login_live"></div> <p class="no_lines"><a href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343109&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3Dhttp:%2F%2Fwww.silverlight.net%2Fshowcase%2Fdefault.aspx&lc=1033&id=265631">Sign in</a> using your Windows Live ID. First use of Windows Live ID requires a one-time step to link an existing or new Silverlight.NET website account.</p> <a id="idPPScarab" href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343109&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3Dhttp:%2F%2Fwww.silverlight.net%2Fshowcase%2Fdefault.aspx&lc=1033&id=265631"><img src="https://www.passportimages.com/1033/signin.gif" class="PassportSignIn" alt="Sign in to Windows Live ID" style="border-style:none" id="idSI"/></a> </div> <div class="login_forms_right"> <div class="login_image login_forms"></div> <p class="no_lines">Sign in using your Silverlight.NET website account. Use this option if you do not have or do not want to use a Windows Live ID.<br /></p> <p class="no_lines"><input type="submit" name="ctl00$mainMiddle$loginForm$Button2" value="Sign In" onclick="javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("ctl00$mainMiddle$loginForm$Button2", "", true, "", "", false, false))" id="ctl00_mainMiddle_loginForm_Button2" class="common_button" /></p> </div> <div class="clear"></div>
</div> <span class="frm_common_bot"></span> </div> <p class="link_not_member">If you would rather use Windows Live ID to sign-in, click <a href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343109&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3Dhttp:%2F%2Fwww.silverlight.net%2Fshowcase%2Fdefault.aspx&lc=1033&id=265631">here</a>.</p> <p class="link_not_member">Not a member yet? <a href="https://login.silverlight.net/login/createuser.aspx?returnurl=http://www.silverlight.net/showcase/default.aspx">Click here to Join</a></p>
Cookie was not marked as HTTPOnly. HTTPOnly cookies can not be read by client-side scripts therefore marking a cookie as HTTPOnly can provide an additional layer of protection against Cross-site Scripting attacks..
Impact
During a Cross-site Scripting attack an attacker might easily access cookies and hijack the victim's session.
Actions to Take
See the remedy for solution
Consider marking all of the cookies used by the application as HTTPOnly (After these changes javascript code will not able to read cookies.
Remedy
Mark the cookie as HTTPOnly. This will be an extra layer of defence against XSS. However this is not a silver bullet and will not protect the system against Cross-site Scripting attacks. An attacker can use a tool such as XSS Tunnel to bypass HTTPOnly protection.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml">
<head><title> Sign In : </title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta name="description" content="Microsoft portal site for the Silverlight development community. Download Silverlight, post to the forums, read Silverlight blogs and learn about Silverlight." /><meta name="keywords" content="Silverlight, RIA, Web, HTML, Developer, Internet, Microsoft, Web Services, Visual Studio .NET" /><meta name="author" content="Microsoft Silverlight" /><meta http-equiv="X-UA-Compatible" content="IE=8" /><link rel="shortcut icon" type="image/ico" href="../favicon.ico" /><link rel="stylesheet" media="all" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-screen" /><link rel="stylesheet" media="all" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-modal" /><link rel="stylesheet" media="print" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-print" /> <script type="text/javascript" src="/resources/script/jquery-1.3.2.min.js"></script> <script type="text/javascript" src="/resources/script/core.min.js"></script> </head>
<h1 class="nomargin bump_bottom">Sign In to the Silverlight Community</h1> <div class="frm_common wrapper_frm_join"> <span class="frm_common_top"></span> <div class="frm_common_mid frm_common_mid_liveauth">
<div class="login_live_left"> <div class="login_image login_live"></div> <p class="no_lines"><a href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343109&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3Dhttp:%2F%2Fwww.silverlight.net%2Fshowcase%2Fdefault.aspx&lc=1033&id=265631">Sign in</a> using your Windows Live ID. First use of Windows Live ID requires a one-time step to link an existing or new Silverlight.NET website account.</p> <a id="idPPScarab" href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343109&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3Dhttp:%2F%2Fwww.silverlight.net%2Fshowcase%2Fdefault.aspx&lc=1033&id=265631"><img src="https://www.passportimages.com/1033/signin.gif" class="PassportSignIn" alt="Sign in to Windows Live ID" style="border-style:none" id="idSI"/></a> </div> <div class="login_forms_right"> <div class="login_image login_forms"></div> <p class="no_lines">Sign in using your Silverlight.NET website account. Use this option if you do not have or do not want to use a Windows Live ID.<br /></p> <p class="no_lines"><input type="submit" name="ctl00$mainMiddle$loginForm$Button2" value="Sign In" onclick="javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("ctl00$mainMiddle$loginForm$Button2", "", true, "", "", false, false))" id="ctl00_mainMiddle_loginForm_Button2" class="common_button" /></p> </div> <div class="clear"></div>
</div> <span class="frm_common_bot"></span> </div> <p class="link_not_member">If you would rather use Windows Live ID to sign-in, click <a href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343109&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3Dhttp:%2F%2Fwww.silverlight.net%2Fshowcase%2Fdefault.aspx&lc=1033&id=265631">here</a>.</p> <p class="link_not_member">Not a member yet? <a href="https://login.silverlight.net/login/createuser.aspx?returnurl=http://www.silverlight.net/showcase/default.aspx">Click here to Join</a></p>
Netsparker identified that the target web server is disclosing ASP.NET version in the HTTP response. This information can help an attacker to develop further attacks and also the system can become an easier target for automated attacks. It was leaked from X-AspNet-Version banner of HTTP response or default ASP.NET error page.
Impact
An attacker can use disclosed information to harvest specific security vulnerabilities for the version identified. The attacker can also use this information in conjunction with the other vulnerabilities in the application or web server.
Remedy
Apply the following changes on your web.config file to prevent information leakage by using custom error pages and removing X-AspNet-Version from HTTP responses.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml">
<head><title> Sign In : </title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta name="description" content="Microsoft portal site for the Silverlight development community. Download Silverlight, post to the forums, read Silverlight blogs and learn about Silverlight." /><meta name="keywords" content="Silverlight, RIA, Web, HTML, Developer, Internet, Microsoft, Web Services, Visual Studio .NET" /><meta name="author" content="Microsoft Silverlight" /><meta http-equiv="X-UA-Compatible" content="IE=8" /><link rel="shortcut icon" type="image/ico" href="../favicon.ico" /><link rel="stylesheet" media="all" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-screen" /><link rel="stylesheet" media="all" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-modal" /><link rel="stylesheet" media="print" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-print" /> <script type="text/javascript" src="/resources/script/jquery-1.3.2.min.js"></script> <script type="text/javascript" src="/resources/script/core.min.js"></script> </head>
<h1 class="nomargin bump_bottom">Sign In to the Silverlight Community</h1> <div class="frm_common wrapper_frm_join"> <span class="frm_common_top"></span> <div class="frm_common_mid frm_common_mid_liveauth">
<div class="login_live_left"> <div class="login_image login_live"></div> <p class="no_lines"><a href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343109&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3Dhttp:%2F%2Fwww.silverlight.net%2Fshowcase%2Fdefault.aspx&lc=1033&id=265631">Sign in</a> using your Windows Live ID. First use of Windows Live ID requires a one-time step to link an existing or new Silverlight.NET website account.</p> <a id="idPPScarab" href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343109&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3Dhttp:%2F%2Fwww.silverlight.net%2Fshowcase%2Fdefault.aspx&lc=1033&id=265631"><img src="https://www.passportimages.com/1033/signin.gif" class="PassportSignIn" alt="Sign in to Windows Live ID" style="border-style:none" id="idSI"/></a> </div> <div class="login_forms_right"> <div class="login_image login_forms"></div> <p class="no_lines">Sign in using your Silverlight.NET website account. Use this option if you do not have or do not want to use a Windows Live ID.<br /></p> <p class="no_lines"><input type="submit" name="ctl00$mainMiddle$loginForm$Button2" value="Sign In" onclick="javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("ctl00$mainMiddle$loginForm$Button2", "", true, "", "", false, false))" id="ctl00_mainMiddle_loginForm_Button2" class="common_button" /></p> </div> <div class="clear"></div>
</div> <span class="frm_common_bot"></span> </div> <p class="link_not_member">If you would rather use Windows Live ID to sign-in, click <a href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343109&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3Dhttp:%2F%2Fwww.silverlight.net%2Fshowcase%2Fdefault.aspx&lc=1033&id=265631">here</a>.</p> <p class="link_not_member">Not a member yet? <a href="https://login.silverlight.net/login/createuser.aspx?returnurl=http://www.silverlight.net/showcase/default.aspx">Click here to Join</a></p>
Netsparker identified that the target web application doesn't use encryption on ViewState data.
Impact
An attacker can study the application's state management logic for possible vulnerabilities and if your application stores application-critical information in the ViewState; it will also be revealed.
Remedy
ASP.NET provides encryption for ViewState parameters.
For page based protection, place the following directive at the top of affected page.
<%@Page ViewStateEncryptionMode="Always" %>
You can also set this option for the whole application by using web.config files. Apply the following configuration for your application's web.config file.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml">
<head><title> Sign In : </title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta name="description" content="Microsoft portal site for the Silverlight development community. Download Silverlight, post to the forums, read Silverlight blogs and learn about Silverlight." /><meta name="keywords" content="Silverlight, RIA, Web, HTML, Developer, Internet, Microsoft, Web Services, Visual Studio .NET" /><meta name="author" content="Microsoft Silverlight" /><meta http-equiv="X-UA-Compatible" content="IE=8" /><link rel="shortcut icon" type="image/ico" href="../favicon.ico" /><link rel="stylesheet" media="all" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-screen" /><link rel="stylesheet" media="all" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-modal" /><link rel="stylesheet" media="print" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-print" /> <script type="text/javascript" src="/resources/script/jquery-1.3.2.min.js"></script> <script type="text/javascript" src="/resources/script/core.min.js"></script> </head>
<h1 class="nomargin bump_bottom">Sign In to the Silverlight Community</h1> <div class="frm_common wrapper_frm_join"> <span class="frm_common_top"></span> <div class="frm_common_mid frm_common_mid_liveauth">
<div class="login_live_left"> <div class="login_image login_live"></div> <p class="no_lines"><a href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343109&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3Dhttp:%2F%2Fwww.silverlight.net%2Fshowcase%2Fdefault.aspx&lc=1033&id=265631">Sign in</a> using your Windows Live ID. First use of Windows Live ID requires a one-time step to link an existing or new Silverlight.NET website account.</p> <a id="idPPScarab" href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343109&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3Dhttp:%2F%2Fwww.silverlight.net%2Fshowcase%2Fdefault.aspx&lc=1033&id=265631"><img src="https://www.passportimages.com/1033/signin.gif" class="PassportSignIn" alt="Sign in to Windows Live ID" style="border-style:none" id="idSI"/></a> </div> <div class="login_forms_right"> <div class="login_image login_forms"></div> <p class="no_lines">Sign in using your Silverlight.NET website account. Use this option if you do not have or do not want to use a Windows Live ID.<br /></p> <p class="no_lines"><input type="submit" name="ctl00$mainMiddle$loginForm$Button2" value="Sign In" onclick="javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("ctl00$mainMiddle$loginForm$Button2", "", true, "", "", false, false))" id="ctl00_mainMiddle_loginForm_Button2" class="common_button" /></p> </div> <div class="clear"></div>
</div> <span class="frm_common_bot"></span> </div> <p class="link_not_member">If you would rather use Windows Live ID to sign-in, click <a href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343109&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3Dhttp:%2F%2Fwww.silverlight.net%2Fshowcase%2Fdefault.aspx&lc=1033&id=265631">here</a>.</p> <p class="link_not_member">Not a member yet? <a href="https://login.silverlight.net/login/createuser.aspx?returnurl=http://www.silverlight.net/showcase/default.aspx">Click here to Join</a></p>
Netsparker identified that the target web server is disclosing the web server's version in the HTTP response. This information can help an attacker to gain a greater understanding of the system in use and potentially develop further attacks targeted at the specific web server version.
Impact
An attacker can look for specific security vulnerabilities for the version identified through the SERVER header information.
Remediation
Configure your web server to prevent information leakage from the SERVER header of its HTTP response.
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <html xmlns="http://www.w3.org/1999/xhtml">
<head><title> Sign In : </title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8" /><meta name="description" content="Microsoft portal site for the Silverlight development community. Download Silverlight, post to the forums, read Silverlight blogs and learn about Silverlight." /><meta name="keywords" content="Silverlight, RIA, Web, HTML, Developer, Internet, Microsoft, Web Services, Visual Studio .NET" /><meta name="author" content="Microsoft Silverlight" /><meta http-equiv="X-UA-Compatible" content="IE=8" /><link rel="shortcut icon" type="image/ico" href="../favicon.ico" /><link rel="stylesheet" media="all" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-screen" /><link rel="stylesheet" media="all" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-modal" /><link rel="stylesheet" media="print" type="text/css" href="/resources/handlers/resource.ashx?resource=en-us-print" /> <script type="text/javascript" src="/resources/script/jquery-1.3.2.min.js"></script> <script type="text/javascript" src="/resources/script/core.min.js"></script> </head>
<h1 class="nomargin bump_bottom">Sign In to the Silverlight Community</h1> <div class="frm_common wrapper_frm_join"> <span class="frm_common_top"></span> <div class="frm_common_mid frm_common_mid_liveauth">
<div class="login_live_left"> <div class="login_image login_live"></div> <p class="no_lines"><a href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343109&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3Dhttp:%2F%2Fwww.silverlight.net%2Fshowcase%2Fdefault.aspx&lc=1033&id=265631">Sign in</a> using your Windows Live ID. First use of Windows Live ID requires a one-time step to link an existing or new Silverlight.NET website account.</p> <a id="idPPScarab" href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343109&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3Dhttp:%2F%2Fwww.silverlight.net%2Fshowcase%2Fdefault.aspx&lc=1033&id=265631"><img src="https://www.passportimages.com/1033/signin.gif" class="PassportSignIn" alt="Sign in to Windows Live ID" style="border-style:none" id="idSI"/></a> </div> <div class="login_forms_right"> <div class="login_image login_forms"></div> <p class="no_lines">Sign in using your Silverlight.NET website account. Use this option if you do not have or do not want to use a Windows Live ID.<br /></p> <p class="no_lines"><input type="submit" name="ctl00$mainMiddle$loginForm$Button2" value="Sign In" onclick="javascript:WebForm_DoPostBackWithOptions(new WebForm_PostBackOptions("ctl00$mainMiddle$loginForm$Button2", "", true, "", "", false, false))" id="ctl00_mainMiddle_loginForm_Button2" class="common_button" /></p> </div> <div class="clear"></div>
</div> <span class="frm_common_bot"></span> </div> <p class="link_not_member">If you would rather use Windows Live ID to sign-in, click <a href="https://login.live.com/login.srf?wa=wsignin1.0&rpsnv=11&ct=1296343109&rver=6.0.5276.0&wp=LBI_SSL&wreply=https:%2F%2Flogin.silverlight.net%2Flogin%2Fsignin.aspx%3Freturnurl%3Dhttp:%2F%2Fwww.silverlight.net%2Fshowcase%2Fdefault.aspx&lc=1033&id=265631">here</a>.</p> <p class="link_not_member">Not a member yet? <a href="https://login.silverlight.net/login/createuser.aspx?returnurl=http://www.silverlight.net/showcase/default.aspx">Click here to Join</a></p>