Re: [jetty-users] OOM by huge header size attack: setResponseHeaderSize

[Joakim Erdfelt <joakim@xxxxxxxxxxx>]

Setting .setResponseHeaderSize() has no effect on the Request header size/limit behavior.

Try using .setRequestHeaderSize() instead.

Joakim Erdfelt / joakim@xxxxxxxxxxx

On Thu, Mar 23, 2017 at 10:20 AM, Conan <yk.cadcg@xxxxxxxxx> wrote:

Folks,

  We use NiFi which embeds Jetty Server. Our test team found a security bug by intercepting the http request and replacing the header with a huge (say 1GB) text, which sent the response to NCM, which got OOM:

2017-03-07 03:44:03,522 WARN [NiFi Web Server-22] o.a.n.c.m.impl.HttpRequestReplicatorImpl Node request for [id=99a65e79-b856-4e43-9056-1451714498fc, apiAddress=129.188.35.109, apiPort=38484, socketAddress=129.188.35.109, socketPort=39494, siteToSiteAddress=129.188.35.109, siteToSitePort=null] encountered exception: java.util.concurrent.ExecutionException: java.lang.OutOfMemoryError: Java heap space

 We tried setResponseHeaderSize here http://download.eclipse.org/jetty/stable-9/apidocs/org/eclipse/jetty/server/HttpConfiguration.html#setResponseHeaderSize-int- but it didn't seem to work: it seems to us that the huge fake header got received before this limit takes effect, as a result, the NCM got OOM in the first place.

Are we missing anything, or is there a potential bug with setResponseHeaderSize, please?

Thanks,
Conan&Sherry

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