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Apache MyFaces 2.0 / 2.1 Information Disclosure

Apache MyFaces 2.0 / 2.1 Information Disclosure
Posted Dec 5, 2011
Authored by Leonardo Uribe

Apache MyFaces Core versions 2.0.1 through 2.0.10 and versions 2.1.0 through 2.1.4 suffer from an information disclosure vulnerability.

tags | exploit, info disclosure
advisories | CVE-2011-4343
MD5 | 3926843d8b1ffcea49cd1a5405a47b67

Apache MyFaces 2.0 / 2.1 Information Disclosure

Change Mirror Download
--------------------------------------------------------------------------------------------------
CVE-2011-4343: Apache MyFaces information disclosure vulnerability

Severity: Important

Vendor: The Apache Software Foundation

Versions Affected:
MyFaces Core 2.0.1 to 2.0.10
MyFaces Core 2.1.0 to 2.1.4

Description:

If a submit outcome includes both faces-redirect=true and
includeViewParams=true
(or faces-include-view-params=true alias) it is possible to inject EL
expressions
directly into input fields mapped as view parameters.

Mitigation:

2.0.x users should update to 2.0.11
2.1.x users should update to 2.1.5
or apply the patch available on
https://issues.apache.org/jira/secure/attachment/12504807/MYFACES-3405-1.patch

Example:

Bean (request scoped):

private String value; // +getter+setter

public String submit() {
String viewId = FacesContext.
getCurrentInstance().getViewRoot().getViewId();
return viewId + "?faces-redirect=true&includeViewParams=true";
}

View:

<f:metadata>
<f:viewParam name="value" value="#{bean.value}" />
</f:metadata>
<h:form>
<h:inputText value="#{bean.value}" />
<h:commandButton value="submit" action="#{bean.submit}" />
</h:form>

Credit: Issue reported on JAVASERVERFACES issue tracer by user BalusC,
and reported back to MyFaces by Frederick Kämpfer.

References:
https://issues.apache.org/jira/browse/MYFACES-3405
<https://issues.apache.org/jira/browse/MYFACES-3405>
http://java.net/jira/browse/JAVASERVERFACES-2247
<http://java.net/jira/browse/JAVASERVERFACES-2247>

--------------------------------------------------------------------------------------------------

regards,

Leonardo Uribe
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