Hello Jukka, the 'java.lang.NumberFormatException' is only one example for error messages that expose system details. There might be a lot of other information that will be shown to potential attackers when detailed error messages are shown to the user, f.e. database related errors showing the database vendor (and indirectly also the database version).
So I also think that error messages should be more generic! Regards Daniel From: Naresh N [mailto:naresh...@gmail.com] Sent: Friday, August 31, 2018 11:20 AM To: jukka.rahko...@maanmittauslaitos.fi Cc: Geoserver-users@lists.sourceforge.net Subject: Re: [Geoserver-users] Disabling error response of WMS/WFS to the Clients/users Dear Jukka Rahkonent,, Thanks a lot for response and explaining detail. Best Regards, Naresh.N On Thu, Aug 30, 2018 at 5:56 PM Rahkonen Jukka (MML) <jukka.rahko...@maanmittauslaitos.fi<mailto:jukka.rahko...@maanmittauslaitos.fi>> wrote: Hi, If you use just non-supported outputformat http://localhost:8080/geoserver/topp/wms?service=WMS&version=1.1.0&request=GetMap&layers=topp%3Astates&bbox=-124.73142200000001%2C24.955967%2C-66.969849%2C49.371735&width=768&height=330&srs=EPSG%3A4326&format=image/png88 then the error is <ServiceException code="InvalidFormat"> There is no support for creating maps in image/png88 format Your error comes from non-numeric height parameter http://localhost:8080/geoserver/topp/wms?service=WMS&version=1.1.0&request=GetMap&layers=topp%3Astates&bbox=-124.73142200000001%2C24.955967%2C-66.969849%2C49.371735&width=768&height=acu330&srs=EPSG%3A4326&format=image/png8 gives similar error <ServiceException> java.lang.NumberFormatException: For input string: "acu330" By reading the WMS 1.3.0 standard such invalid WIDTH and HEIGHT parameters are not really deald in it. What is closest is in this: “If the WMS server has declared that a Layer has fixed width and height, as described in 7.2.4.7.5, then the client shall specify exactly those WIDTH and HEIGHT values in the GetMap request and the server may issue a service exception otherwise.” The message reveals that server is Java based which is something that the end user does not need to know. It is also telling that number format used in the request is not correct and that’s useful information for the user. Disabling the whole exception in not possible because it is mandatory. So what is left is filtering the “java.lang” away. I believe it could be done (I am not a developer) but I believe that it would not be any huge improvement for the security. If somebody proves that I am wrong I can change my mind. -Jukka Rahkonen- Lähettäjä: Naresh N [mailto:naresh...@gmail.com<mailto:naresh...@gmail.com>] Lähetetty: 30. elokuuta 2018 9:52 Vastaanottaja: Rahkonen Jukka (MML) <jukka.rahko...@maanmittauslaitos.fi<mailto:ahko...@maanmittauslaitos.fi>> Aihe: Re: [Geoserver-users] Disabling error response of WMS/WFS to the Clients/users Dear Dear Jukka Rahkonent, Please find the below request http://bhuvan-suvidha.nrsc.gov.in/geoserver/wms/reflect?layers=geonode:kds_name&width=200&height=150&format=image/png8&fo rmat=image/png8&height=acu7746%EF%BC%9Cs1%EF%B9%A5s2%CA%BAs3%CA%B9uca7746&layers=geonode :kds_name&width=200 The above request is generated by Web Application Security tool, and is is listed as security alert as it is showing the error message as java.lang.Number Format Exception. Recommendation is to disable the error message. Kindly help me to resolve this. Thanks&Regards, Naresh On Thu, Aug 30, 2018 at 11:17 AM Rahkonen Jukka (MML) <jukka.rahko...@maanmittauslaitos.fi<mailto:jukka.rahko...@maanmittauslaitos.fi>> wrote: Hi, Please show the whole request with the wrong &FORMAT= parameter. -Jukka Rahkonen- ________________________________ Lähettäjä: Naresh N<mailto:naresh...@gmail.com> Lähetetty: 30.8.2018 7:22 Vastaanottaja: Rahkonen Jukka (MML)<mailto:jukka.rahko...@maanmittauslaitos.fi> Aihe: Re: [Geoserver-users] Disabling error response of WMS/WFS to the Clients/users Dear Jukka Rahkonent, Thanks for the response. The error message ' java.lang.Number FormatException' belongs to InvaildFormat. Instead of showing service exception i.,e java.lang.Number Format Exception, how to display InvalidFormat message to user. Although this erros is not displaying any sensitive information, as per our security alerts measure, we want disable the error messages. Kindly let me know how to do. Thanks&Regards, Naresh On Wed, Aug 29, 2018 at 8:08 PM Rahkonen Jukka (MML) <jukka.rahko...@maanmittauslaitos.fi<mailto:jukka.rahko...@maanmittauslaitos.fi>> wrote: Hi, I suppose that you mean the contents " java.lang.NumberFormatException: For input string:". Exceptions are compulsory by the WMS standard. The following codes are reserved for special meanings. InvalidFormat InvalidCRS LayerNotDefined StyleNotDefined LayerNotQueryable InvalidPoint CurrentUpdateSequence InvalidUpdateSequence MissingDimensionValue InvalidDimensionValue OperationNotSupported The error that triggers your error does not quite suit with these predefined meanings and therefore the error code must be something else. The code that you get now is "java.lang.NumberFormatException". At least it is somewhat informative but would you rather see some other text as an error message? Client can also ask exceptions in another format with &EXCEPTIONS=INIMAGE of &EXCEPTIONS=BLANK, but the default XML format is still mandatory and it can't be turned off. -Jukka Rahkonen- -----Alkuperäinen viesti----- Lähettäjä: naresh [mailto:naresh...@gmail.com<mailto:naresh...@gmail.com>] Lähetetty: 29. elokuuta 2018 16:33 Vastaanottaja: geoserver-users@lists.sourceforge.net<mailto:geoserver-users@lists.sourceforge.net> Aihe: [Geoserver-users] Disabling error response of WMS/WFS to the Clients/users Hello ALL, Please see the following error message received on wrong values of params of WMS reqeust <ServiceExceptionReport xmlns="http://www.opengis.net/ogc" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" version="1.3.0" xsi:schemaLocation="http://www.opengis.net/ogc http://bhuvan-suvidha.nrsc.gov.in/geoserver/schemas/wms/1.3.0/exceptions_1_3_0.xsd"> <ServiceException> java.lang.NumberFormatException: For input string: "" For input string: "" </ServiceException> </ServiceExceptionReport> I want to disable the error message, it should not be displayed to user *How to disable errors displaying messages in Geoserver. * Please help solving my issue Thanks&Regards, Naresh -- Sent from: http://osgeo-org.1560.x6.nabble.com/GeoServer-User-f3786390.html ------------------------------------------------------------------------------ Check out the vibrant tech community on one of the world's most engaging tech sites, Slashdot.org! http://sdm.link/slashdot _______________________________________________ Geoserver-users mailing list Please make sure you read the following two resources before posting to this list: - Earning your support instead of buying it, but Ian Turton: http://www.ianturton.com/talks/foss4g.html#/ - The GeoServer user list posting guidelines: http://geoserver.org/comm/userlist-guidelines.html If you want to request a feature or an improvement, also see this: https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer Geoserver-users@lists.sourceforge.net<mailto:Geoserver-users@lists.sourceforge.net> https://lists.sourceforge.net/lists/listinfo/geoserver-users
_______________________________________________ Geoserver-users mailing list Please make sure you read the following two resources before posting to this list: - Earning your support instead of buying it, but Ian Turton: http://www.ianturton.com/talks/foss4g.html#/ - The GeoServer user list posting guidelines: http://geoserver.org/comm/userlist-guidelines.html If you want to request a feature or an improvement, also see this: https://github.com/geoserver/geoserver/wiki/Successfully-requesting-and-integrating-new-features-and-improvements-in-GeoServer Geoserver-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/geoserver-users