Hi,

On Fri, Apr 24, 2020, 22:13 Igor Khvostenkov
<igor.khvosten...@lindenbaum.eu.invalid> wrote:

> Problem is not in the application but in the configuration put proxy which
> does the redirect in front of the any application with form submit. IMHO
> this change https://issues.apache.org/jira/browse/WICKET-6708 does not
> keep in mind that it could be redirect call with GET request with POST
> parameters.
>

This change is fixing a security related issue.
In my opinion your proxy config is wrong. I don't understand "redirect call
with GET request with POST parameters".
Redirects are always GET. And their parameters are in the query string.

What does your proxy do with multipart POSTs?
What does it do with single part body that is too long to be in the query
string? Does it truncate it?


> -Igor.
>
> On 24. Apr 2020, at 20:57, Martin Grigorov <mgrigo...@apache.org<mailto:
> mgrigo...@apache.org>> wrote:
>
> Please create a demo application so we can take a look!
>
> On Fri, Apr 24, 2020 at 9:31 PM Igor Khvostenkov
> <igor.khvosten...@lindenbaum.eu.invalid<mailto:
> igor.khvosten...@lindenbaum.eu.invalid>> wrote:
>
> Sven,
>
> Same stuff with crypto off. Here is with debugger on getParameterValues:
>
>
>
> -Igor.
>
> On 24. Apr 2020, at 18:51, Sven Meier <s...@meiers.net<mailto:
> s...@meiers.net>> wrote:
>
> Hi,
>
> Request URL:
>
>
> https://xxx/conference/ng/login.html?wicket-crypt=K74urk0qnfk8F32WFqNIZ0ccIAoZmK_PRtgAUuVznyL7RVd7N2v3qyd6logyxMvfiOoODib4b4SbNSzjrurYj7CtzyDM6frC1a9kKasEFTErL7A1o8Y6qjFRX8EKFKZXfqOAAsWO01QO7MgjTsJaOkrQX-Ez-mAG5UgADs3kdXgJpJlXbS8vhw
> Request Method:
> GET
>
> that is a GET request with query parameters.
>
> Form inputs should be able to pick up the values from the query parameters.
>
> Maybe the problem is related to the cryptoMapper? Could you disable it for
> a test?
>
> Have fun
> Sven
>
>
> On 24.04.20 17:43, Igor Khvostenkov wrote:
>
> Hi Sven,
>
> Yes exactly, but in fact this is POST. This is GET with POST parameters.
> And then FormComponent#getParameterValues(String inputName)
>
> case Form.METHOD_GET:
> parameters = request.getQueryParameters();
> break;
>
> Instead of
>
> case Form.METHOD_POST:
> parameters = request.getPostParameters();
> break;
>
> And I lost my POST parameters. Nothing works after.
>
> -Igor.
>
>
> On 24. Apr 2020, at 15:07, Sven Meier <s...@meiers.net<
> mailto:s...@meiers.net <s...@meiers.net<mailto:s...@meiers.net>>>> wrote:
>
> Hi Igor,
>
> so the browser sends the request a second time via "get".
>
> That shouldn't be a problem, since in that case all FormComponents will
> read their parameters from the query parameters.
>
> So what is your actual problem?
>
> Have fun
> Sven
>
>
> On 24.04.20 11:34, Igor Khvostenkov wrote:
> Hi Martin,
>
> Thanks for the hint with "Preserve log”. Looks like still this is exactly
> what I described in reply to Sven. Browser does really POST request:
>
>
>     *
> Request URL:
>
>
> https://xxx/conference/ng/login.html?wicket-crypt=K74urk0qnfk8F32WFqNIZ0ccIAoZmK_PRtgAUuVznyL7RVd7N2v3qyd6logyxMvfiOoODib4b4SbNSzjrurYj7CtzyDM6frC1a9kKasEFTErL7A1o8Y6qjFRX8EKFKZXfqOAAsWO01QO7MgjTsJaOkrQX-Ez-mAG5UgADs3kdXgJpJlXbS8vhw
>     *
> Request Method:
> POST
>     *
> Status Code:
> 302
>     *
> Remote Address:
> xxx:443
>     *
> Referrer Policy:
> no-referrer-when-downgrade
>  1.  Response Headers
>     *
> cache-control:
> no-cache, no-store
>     *
> content-length:
> 0
>     *
> date:
> Fri, 24 Apr 2020 09:17:33 GMT
>     *
> expires:
> Thu, 01 Jan 1970 00:00:00 GMT
>     *
> location:
> ./DHB1U_x9J1dRXqDe8wegYw/DHB6d
>     *
> pragma:
> no-cache
>     *
> server:
> nginx
>     *
> status:
> 302
>
> And then it gets redirect from proxy-server. And next request Browser
> substitutes POST to GET, as stated in RFC:
>
>
>     *
> Request URL:
>
>
> https://xxx/conference/ng/login.html?wicket-crypt=K74urk0qnfk8F32WFqNIZ0ccIAoZmK_PRtgAUuVznyL7RVd7N2v3qyd6logyxMvfiOoODib4b4SbNSzjrurYj7CtzyDM6frC1a9kKasEFTErL7A1o8Y6qjFRX8EKFKZXfqOAAsWO01QO7MgjTsJaOkrQX-Ez-mAG5UgADs3kdXgJpJlXbS8vhw
>     *
> Request Method:
> GET
>     *
> Status Code:
> 302
>     *
> Remote Address:
> 10.1.37.99:443
>     *
> Referrer Policy:
> no-referrer-when-downgrade
>  1.  Response Headers
>     *
> cache-control:
> no-cache, no-store
>     *
> content-length:
> 0
>     *
> date:
> Fri, 24 Apr 2020 09:17:33 GMT
>     *
> expires:
> Thu, 01 Jan 1970 00:00:00 GMT
>     *
> location:
> ./login.html?wicket-crypt=0SaMcpSjW2Y
>     *
> pragma:
> no-cache
>     *
> server:
> nginx
>     *
> status:
> 302
>
> Am I missing something?
>
> -Igor.
>
> On 24. Apr 2020, at 09:41, Martin Grigorov <mgrigo...@apache.org<mailto:
> mgrigo...@apache.org><mailto:
> mgrigo...@apache.org<mailto:mgrigo...@apache.org>><mailto:
> mgrigo...@apache.org>> wrote:
>
> On Fri, Apr 24, 2020 at 10:36 AM Igor Khvostenkov
> <igor.khvosten...@lindenbaum.eu.invalid<mailto:
> igor.khvosten...@lindenbaum.eu.invalid><mailto:
> igor.khvosten...@lindenbaum.eu.invalid<mailto:
> igor.khvosten...@lindenbaum.eu.invalid>><mailto:
> igor.khvosten...@lindenbaum.eu.invalid<mailto:
> igor.khvosten...@lindenbaum.eu.invalid>>> wrote:
>
> Hi Martin,
>
> Yes, this is login form with special “token".
>
> If this is PRG should I see POST request in Browser console? I see only
> GET. Exactly one I’ve posted. Meaning that Browser does the substitution.
>
>
> Yes, you should see POST with status 302 and then GET.
> But to see them both you need to check "Preserve log" in the Network tab.
> Otherwise the browser shows only the requests for the last load of the page
> (including the request for the page itself and all resources like
> css/js/images)
>
>
>
> -Igor.
>
> On 24. Apr 2020, at 06:02, Martin Grigorov <mgrigo...@apache.org<mailto:
> mgrigo...@apache.org><mailto:
> mgrigo...@apache.org<mailto:mgrigo...@apache.org>><mailto:
> mgrigo...@apache.org><mailto:
> mgrigo...@apache.org<mailto:mgrigo...@apache.org><mailto:
> mgrigo...@apache.org><mailto:
> mgrigo...@apache.org<mailto:mgrigo...@apache.org>>>> wrote:
>
> Hi Igor,
>
>
>
> On Fri, Apr 24, 2020 at 12:55 AM Igor Khvostenkov
> <igor.khvosten...@lindenbaum.eu.invalid<mailto:
> igor.khvosten...@lindenbaum.eu.invalid><mailto:
> igor.khvosten...@lindenbaum.eu.invalid<mailto:
> igor.khvosten...@lindenbaum.eu.invalid>><mailto:
> igor.khvosten...@lindenbaum.eu.invalid<mailto:
> igor.khvosten...@lindenbaum.eu.invalid>><mailto:
> igor.khvosten...@lindenbaum.eu.invalid<mailto:
> igor.khvosten...@lindenbaum.eu.invalid><mailto:
> igor.khvosten...@lindenbaum.eu.invalid<mailto:
> igor.khvosten...@lindenbaum.eu.invalid>><mailto:
> igor.khvosten...@lindenbaum.eu.invalid<mailto:
> igor.khvosten...@lindenbaum.eu.invalid>>>> wrote:
>
> Hi Sven,
>
> POST is substituted with GET by the HTTP client (Browser).
>
> A web-server, any web-server, returns a 301 or 302 redirect then Browser,
> on client side, will replace any type of request to GET. No server-side
> configuration or any http headers returned will not change that.
>
> -Igor.
>
>
> On 23. Apr 2020, at 22:47, Sven Meier <s...@meiers.net<mailto:
> s...@meiers.net><mailto:
> s...@meiers.net<mailto:s...@meiers.net>><mailto:s...@meiers.net><mailto:
> s...@meiers.net<mailto:s...@meiers.net><mailto:s...@meiers.net><mailto:
> s...@meiers.net>><mailto:
> s...@meiers.net<mailto:s...@meiers.net><mailto:s...@meiers.net><mailto:
> s...@meiers.net><mailto:
> s...@meiers.net<mailto:s...@meiers.net>>>> wrote:
>
> Hi Igor,
>
> so you think the "post" is redirected to a "get"? Why should that be the
> case?
>
> Who issues this redirect?
>
> Best regards
> Sven
>
>
> On 23.04.20 22:37, Igor Khvostenkov wrote:
> Hi Sven,
>
> Thank you for your reply. I did some deep investigation in the problem and
> this is what I found:
>
> if the generated HTML contains method="post", the browser will send the
> form as post request.
> This is no exactly true. Or let’s say this is true not in all cases. The
> problem could happen when your web server returns a 301 or 302 redirect
> then Browser will replace any type of request to GET:
>
>
> Note: RFC 1945<https://tools.ietf.org/html/rfc1945> and RFC 2068<
> https://tools.ietf.org/html/rfc2068> specify that the client is not
> allowed
>    to change the method on the redirected request.  However, most
>    existing user agent implementations treat 302 as if it were a 303
>    response, performing a GET on the Location field-value regardless
>    of the original request method. The status codes 303 and 307 have
>    been added for servers that wish to make unambiguously clear which
>    kind of reaction is expected of the client.
>
> This is exactly what happens in my case. And I can not really do anything
> here, this is how all Browsers work. This was working good until we
> upgraded to Wicket 7.16. There is one change which “broke” previously
> working stuff. This change
> https://issues.apache.org/jira/browse/WICKET-6708 and more precise this
> code
>
>
>
> https://github.com/apache/wicket/commit/0c19cf8/#diff-51cf2faf6078497df77cc6d995dd1b98
> .
> Starting from Wicket 7.16 you distinguish between GET and POST in
> FormComponent#getInputAsArray() and for the form submit this will not work
> in case of redirect.
>
> -Igor.
>
> On 23. Apr 2020, at 17:15, Sven Meier <s...@meiers.net<mailto:
> s...@meiers.net><mailto:
> s...@meiers.net<mailto:s...@meiers.net>><mailto:
> s...@meiers.net<mailto:s...@meiers.net><mailto:s...@meiers.net>><mailto:
> s...@meiers.net<mailto:s...@meiers.net><mailto:s...@meiers.net><mailto:
> s...@meiers.net>><mailto:
> s...@meiers.net<mailto:s...@meiers.net>>> wrote:
>
> Hi,
>
> if the generated HTML contains method="post", the browser will send the
> form as post request.
>
> Without more detailed information, it's hard to find the error. Can you
> write a quickstart?
>
> Have fun
> Sven
>
>
> On 23.04.20 11:59, Igor Khvostenkov wrote:
> Hi *,
>
> I faced with the problem. When Wicket-generated URL contains jsessionId,
> form submitted with GET request, and not POST. If I remove jsessionId from
> URL, then normal POST request is done. I have no idea where this GET is
> coming from. I ovverode getMethod() to always return POST and issue still
> exist. Any ideas where I can look to figure out why GET request is done?
>
> Generated HTML:
>
> <pre>
>
> <form role="form" id="accessForm5"
>
>
>
> wicketpath="pageBorder_pageBorder__body_mainBorder_mainBorder__body_contentBorder_contentBorder__body_content_accessForm"
> method="post"
>
>
>
> action="./login.html;jsessionid=8B3813A1300187D10FE8211AF47D9F7F?0-1.IFormSubmitListener-pageBorder-pageBorder_body-mainBorder-mainBorder_body-contentBorder-contentBorder_body-content-accessForm"
> wicketsource="Login.java:39"><div
>
>
>
> style="width:0px;height:0px;position:absolute;left:-100px;top:-100px;overflow:hidden"
> class="hidden-fields"><input type="hidden" name="accessForm5_hf_0"
> id="accessForm5_hf_0"></div> <wicket:container id="feedback6"
> style="display:none"></wicket:container> <h2>Konferenz-Teilnehmer</h2> <div
> class="form-group"> <div class="input-group"> <input id=“code" type="text"
> class="form-control" value="" name=“code"
>
>
>
> wicketpath="pageBorder_pageBorder__body_mainBorder_mainBorder__body_contentBorder_contentBorder__body_content_accessForm_code"
> placeholder=“Code" wicketsource="LoginForm.java:50"> <span
> class="input-group-btn"> <input id="login" type="submit" class="btn
> btn-primary"
>
>
>
> wicketpath="pageBorder_pageBorder__body_mainBorder_mainBorder__body_contentBorder_contentBorder__body_content_accessForm_wicket__message__attr__6578556"
> value="Teilnehmen"> </span> </div> </div> </form>
>
> </pre
>
> Request Headers:
>
>
> 1.
> :authority:
> xxx
> 2.
> :method:
> GET
> 3.
> :path:
>
>
>
>
> /conference/ng/login.html?0-1.IFormSubmitListener-pageBorder-pageBorder_body-mainBorder-mainBorder_body-contentBorder-contentBorder_body-content-accessForm
>
>
> Is that a login form that you try to submit ?
> Or it is another form and the server sees that you are not authenticated
> and this is the reason to redirect you to login.html ?
>
> Another explanation for the misterious GET could be that Wicket uses
> RedirectAfterPost pattern to prevent double submits. See
> https://en.wikipedia.org/wiki/Post/Redirect/Get for more details.
>
> 4.
> :scheme:
> https
> 5.
> accept:
>
>
>
>
> text/html,application/xhtml+xml,application/xml;q=0.9,image/webp,image/apng,*/*;q=0.8,application/signed-exchange;v=b3;q=0.9
> 6.
> accept-encoding:
> gzip, deflate, br
> 7.
> accept-language:
> de
> 8.
> cookie:
> JSESSIONID=8B3813A1300187D10FE8211AF47D9F7F
> 9.
> referer:
> https://xxx/conference/ng/wicket/page?3
> 10.
> sec-fetch-dest:
> document
> 11.
> sec-fetch-mode:
> navigate
> 12.
> sec-fetch-site:
> same-origin
> 13.
> upgrade-insecure-requests:
> 1
> 14.
> user-agent:
> Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_4) AppleWebKit/537.36 (KHTML,
> like Gecko) Chrome/81.0.4044.122 Safari/537.36
>
> -Igor.
>
>
>
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