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Multiple Vulnerabilities in CompuCMS

Advisory ID:HTB22580
Product:CompuCMS
Vendor:CompuSoft A/S
Vulnerable Versions:Current on 06.08.2010 and probably prior
Tested Version:Current on 06.08.2010
Advisory Publication:August 9, 2010 [without technical details]
Vendor Notification:August 9, 2010
Public Disclosure:August 23, 2010
Vulnerability Type:Cross-Site Scripting [CWE-79]
SQL Injection [CWE-89]
Risk Level:High
CVSSv2 Base Scores:4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
7.5 (AV:N/AC:L/Au:N/C:P/I:P/A:P)
Discovered and Provided:High-Tech Bridge Security Research Lab
 

Advisory Details:

High-Tech Bridge SA Security Research Lab has discovered multiple vulnerabilities CompuCMS, which could be exploited to perform cross-site scripting and SQL Injection attacks.

1) Cross-site scripting (XSS) vulnerabilities in CompuCMS

1.1 The vulnerability exists due to input sanitation error in the "sprog" parameter in index.asp. 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.
Exploitation example:
http://host/index.asp?mode=for!forside!gb&sprog=gb'"><script>alert(document. cookie)</script>

1.2 The vulnerability exists due to input sanitation error in the "site", "Dir" and "mode" parameters in /_CompuCMS/_CMS_output/_viskarrusel.inc.asp. 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.
Exploitation examples:
http://host/_CompuCMS/_CMS_output/_viskarrusel.inc.asp?mode=alm!udflugtsmaal !dk&vispic=2138&Dir=&site=demo%27%22%3E%3Cscript%3Ealert%28document.cookie%2 9%3C/script%3Ed&NoElementNum=0&NoFirstElement
http://host/_CompuCMS/_CMS_ou tput/_viskarrusel.inc.asp?mode=alm!udflugtsmaal!dk&vispic=2138&Dir=%27%22%3E %3Cscript%3Ealert%28document.cookie%29%3C/script%3E%3C&site=demo&NoElementNu m=0&NoFirstElement
http://host/_CompuCMS/_CMS_output/_viskarrusel.inc.asp?m ode=alm!udflugtsmaal!dk%27%22%3E%3Cscript%3Ealert%28document.cookie%29%3C/sc ript%3E%3C&vispic=2138&Dir=&site=demo&NoElementNum=0&NoFirstElement


1.3 The vulnerability exists due to input sanitation error in the "billede" parameter in /_CompuCMS/_CMS_output/_visbillede.asp. 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.
Exploitation example:
http://host/_CompuCMS/_CMS_output/_visbillede.asp?billede=1.jpg&tekst=%3Cscr ipt%3Ealert%28document.cookie%29%3C/script%3E
http://host/_CompuCMS/_CMS_ output/_visbillede.asp?billede=1.jpg%27%22%3E%3Cscript%3Ealert%28document.co okie%29%3C/script%3E&tekst=


2) SQL injection vulnerabilities in CompuCMS
2.1 The vulnerability exists due to input sanitation error in the "sogeord" and "visid" parameters in index.asp. A remote attacker can send a specially crafted HTTP GET request to the vulnerable script and execute arbitrary SQL commands in application`s database. Successful exploitation may allow an attacker to read, modify, add or delete arbitrary data in the database.
Exploitation examples:
http://host/index.asp?mode=visresultat&sogeord=%27+ANY_SQL_CODE
http://host/demo/index.asp?mode=nyh!forside~1220010667!dk&visid=383%27+ANY_S QL_CODE

2.2 The vulnerability exists due to input sanitation error in the "vispic" parameter in /_CompuCMS/_CMS_output/_viskarrusel.inc.asp. A remote attacker can send a specially crafted HTTP GET request to the vulnerable script and execute arbitrary SQL commands in application`s database. Successful exploitation may allow an attacker to read, modify, add or delete arbitrary data in the database.
Exploitation example:
http://host/_CompuCMS/_CMS_output/_viskarrusel.inc.asp?mode=alm!udflugtsmaal !dk&vispic=2138+ANY_SQL_CODE&Dir=www.compucms.dk/demo/&site=demo&NoElementNu m=0&NoFirstElement

2.3 The vulnerability exists due to input sanitation error in the login field in /demo/inc/_login.asp. A remote attacker can send a specially crafted HTTP GET request to the vulnerable script and execute arbitrary SQL commands in application`s database. Successful exploitation may allow an attacker to read, modify, add or delete arbitrary data in the database.
Exploitation example:
Add this value
' ANY_SQL_CODE
in login form at http://host/demo/inc/_login.asp.


ImmuniWeb® On-Demand Web Application Penetration Test


Solution:
Currently we are not aware of any vendor-supplied patches or other solutions. The vendor was contacted in accordance to our Vendor Notification Policy but we didn't get any answer or feedback.


References:
[1] High-Tech Bridge Advisory HTB22580 - https://www.htbridge.com/advisory/HTB22580 - Multiple vulnerabilities in CompuCMS
[2] CompuCMS - compusoft.dk - CompuCMS is a webbased simple, yet effective CMS system, aimed at websites that need freedom of design.
[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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