Changes for page Application_Liferay

Last modified by Nicolas Gregoire on 2012/04/19 14:05
From version Icon 23.3 Icon
edited by Nicolas Gregoire
on 2012/01/25 10:54
Change comment: Added tag [XEE]
To version Icon 21.1 Icon
edited by Nicolas Gregoire
on 2012/01/14 18:49
Change comment: There is no comment for this version

Summary

Details

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1 -liferay|java|xalan-j|code execution|XEE
1 +liferay|java|xalan-j|code execution|xee
Content
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8 8  
9 9  = Java code execution =
10 10  
11 -LIferay includes numerous portlets. The "XSL Content" portlet displays the result of the XSL transformation of a XML document. The XSLT engine used by default is [[Xalan-J>>Engine_XalanJ]] (but this can probably modified easily using [[JAXP>>http://en.wikipedia.org/wiki/Java_API_for_XML_Processing||rel="__blank"]]). As Xalan-J allows by default to execute Java code from the stylesheet, that's an easy to exploit vulnerability. Any logged-in user can execute arbitrary Java code in the context of the Web Application server (usually Tomcat) : [[CVE-2011-1571>>http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1571||rel="__blank"]].
11 +LIferay includes numerous portlets. The "XSL Content" portlet displays the result of the XSL transformation of a XML document. The XSLT engine used by default is [[Xalan-J>>Engine_Saxon]] (but this can probably modified easily using [[JAXP>>http://en.wikipedia.org/wiki/Java_API_for_XML_Processing||rel="__blank"]]). As Xalan-J allows by default to execute Java code from the stylesheet, that's an easy to exploit vulnerability. Any logged-in user can execute arbitrary Java code in the context of the Web Application server (usually Tomcat) : [[CVE-2011-1571>>http://cve.mitre.org/cgi-bin/cvename.cgi?name=CVE-2011-1571||rel="__blank"]].
12 12  
13 13  Executing commands and reading the output (using the "xalanj-reading-stdout.xsl" script included on the [[Xalan-J>>Engine_XalanJ]] page) :
14 14  
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22 22  
23 23  * CVE-2011-1502 : allows to read UTF-8 files and to list directories via a XEE (XML External Entity) attack
24 24  
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25 25  Reading /etc/passwd using CVE-2011-1502 (cf attached files [[liferay-xee.xsl>>attach:liferay-xee.xsl]] and [[liferay-xee.xml>>attach:liferay-xee.xml]]) :
26 26  
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27 27  [[image:liferay-read-etc-passwd-via-xee.png||style="display: block; margin-left: auto; margin-right: auto"]]