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A5 Server Under Attack?

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    #1

    A5 Server Under Attack?

    Server crashed and unloaded 4 times today. Here is one instance. Note the time on all of these...

    From the X-Basic Stack Log:
    ==========================================================
    Tue Feb 12 12:35:30 2013
    The filename, directory name, or volume label syntax is incorrect.
    <NUL>.DDD
    Execution Stack:
    0#1 evaluate_shared_private(
    0#22 OOhttpdServerClientMIME(ptemp,"AppServerMain")
    Tue Feb 12 12:35:30 2013
    Web Security Data: Invalid Connection String
    Execution Stack:
    0#1 evaluate_shared_private(
    0#22 OOhttpdServerClientMIME(ptemp,"AppServerMain")
    ==========================================================

    From the Access Log:
    ==========================================================
    12/Feb/2013:12:35:08 -0600] "POST /rlip.a5w HTTP/1.1" 500 224 <--- Login Page
    ==========================================================

    From the Error Log:
    ==========================================================
    Tue Feb 12 12:35:22 2013] [Fatal Server Error] Fatal server error: [Web Security Data: Invalid Connection String] at line 166 in addins build 3226
    [Tue Feb 12 12:35:22 2013] [error] Fatal server error: [Web Security Data: Invalid Connection String] at line 166 in addins build 3226
    [Tue Feb 12 12:35:22 2013] [Internal Server Error] (C:\A5v11\A5Webroot\rlip.a5w) The server encountered a fatal error processing this request and could not continue.
    [Tue Feb 12 12:35:30 2013] [Fatal Server Error] Fatal server error: [Web Security Data: Invalid Connection String] at line 166 in addins build 3226
    [Tue Feb 12 12:35:30 2013] [error] Fatal server error: [Web Security Data: Invalid Connection String] at line 166 in addins build 3226
    [Tue Feb 12 12:35:30 2013] [Internal Server Error] (C:\A5v11\A5Webroot\rlip.a5w) The server encountered a fatal error processing this request and could not continue.
    [Tue Feb 12 12:35:32 2013] [Fatal Server Error] Fatal server error: [Web Security Data: Invalid Connection String] at line 166 in addins build 3226
    [Tue Feb 12 12:35:32 2013] [error] Fatal server error: [Web Security Data: Invalid Connection String] at line 166 in addins build 3226
    [Tue Feb 12 12:35:32 2013] [Internal Server Error] (C:\A5v11\A5Webroot\rlip.a5w) The server encountered a fatal error processing this request and could not continue.

    rlip.a5w is my login page using websecurity. Is it possible to login in such a way that will crash the server?
    Last edited by mvaughn; 02-12-2013, 08:43 PM.
    Rapid Development, Training, Support
    http://data2web.network
    903-740-2549
    Tags: None
    #2
    Re: A5 Server Under Attack?

    It is normal that public server is under attacks all the time. Normally attacks are targeted towards open server ports.

    Login page post happened 12:35:08 and server error 12:35:22. I wonder what happened during these 14 seconds before server error.

    Comment

      #3
      Re: A5 Server Under Attack?

      It is unlikely that 'someone' is attacking any specific page in your application, like not attacking the login page. Typically anonymous attacks are against "known" pages like admin.php, or similar. No robot knows anything about any A5W page. It looks more like you have a programming bug on your login page.

      Also, your error log shows you are using the Pre-Release on your server, 6 patches old. Lots of security framework updates in the pre-release.
      Steve Wood
      See my profile on IADN

      Comment

        #4
        Re: A5 Server Under Attack?

        Originally posted by mvaughn View Post
        rlip.a5w is my login page using websecurity. Is it possible to login in such a way that will crash the server?
        We use SQL security and one of our internal servers constantly reports the first error you reported in xbasic.log but does not appear to cause any problem and the same app on other servers is okay.
        ==========================================================
        Wed Feb 13 16:19:42 2013
        The filename, directory name, or volume label syntax is incorrect.
        <NUL>.DDD
        Execution Stack:
        0#1 evaluate_shared_private(
        0#18 OOhttpdServerClientMIME(ptemp,"AppServerMain")
        ==========================================================

        The second error in xbasic.log looks to be related to the connection to the web security tables on login.
        is it a particular IP address that causes the server crash ?
        Are you using dbf or sql security tables ?
        https://appsbydesign.co.uk/

        Comment

          #5
          Re: A5 Server Under Attack?

          yes, it is the same ip related to each crash so I know who the culprit is.
          websecurity is sql based with active link tables.

          ps... thanks steve for the heads up on the patches. I just downloaded them.
          Rapid Development, Training, Support
          http://data2web.network
          903-740-2549

          Comment

            #6
            Re: A5 Server Under Attack?

            not seen the connection error but we did have issues with WAS freezing and crashing intermittently in v11.
            Alpha Software added some fixes to prevent those which should be available in the current production release.

            Other things you can try are
            - enable Log Raw HTTP traffic temporarily - This will log much more details so you can compare a good and bad post however this might make the server less responsive whilst enabled
            - deny access to that specific IP via WAS IP Restrictions or firewall
            https://appsbydesign.co.uk/

            Comment

              #7
              Re: A5 Server Under Attack?

              You posted in the V10 forum, but the message indicated you were running a V11 pre-release. There were some recent changes in the security related to using SQL tables in the pre-release and if using them, you should be on the latest one.

              Comment

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