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https://issues.apache.org/jira/browse/WW-5723?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Lukasz Lenart updated WW-5723:
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Component/s: Plugin - REST
> REST plugin does not bound the request body read in ContentTypeInterceptor
> --------------------------------------------------------------------------
>
> Key: WW-5723
> URL: https://issues.apache.org/jira/browse/WW-5723
> Project: Struts 2
> Issue Type: Improvement
> Components: Plugin - REST
> Reporter: Lukasz Lenart
> Assignee: Lukasz Lenart
> Priority: Major
> Fix For: 6.12.0, 7.4.0
>
> Time Spent: 50m
> Remaining Estimate: 0h
>
> h2. Summary
> {{ContentTypeInterceptor}} reads the request body with no length limit, while
> the two sibling body reads in the framework are bounded. This issue applies
> the same limit to the REST plugin.
> h2. Current behaviour
> {{ContentTypeInterceptor.intercept}} checks {{request.getContentLength() >
> 0}} and then hands {{request.getInputStream()}} to the selected
> {{ContentTypeHandler}}, which reads it to the end. Neither the interceptor
> nor {{RestConstants}} defines a maximum length.
> The JSON plugin bounds its equivalent read with {{struts.json.maxLength}}
> (default 2 MB), and {{CspReportAction}} bounds its read with
> {{struts.csp.report.maxSize}}. The REST plugin has no counterpart.
> h2. Proposed change
> Add {{struts.rest.content.maxLength}}, defaulting to 2 MB to match the JSON
> plugin, injected into {{ContentTypeInterceptor}} as a framework constant.
> Enforce it on the read itself by wrapping the reader handed to the handler,
> so a body exceeding the limit is rejected while being read, independent of
> the declared Content-Length.
> A configured value outside a sane range is ignored with a warning and the
> default kept, as {{CspReportAction}} does.
> The existing {{getContentLength() > 0}} condition is unchanged.
> h2. Compatibility notes
> A request whose body exceeds the configured limit is rejected rather than
> processed. Applications that accept larger bodies through the REST plugin
> need to raise {{struts.rest.content.maxLength}}.
> Applies to both maintenance lines.
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