Snort mailing list archives
Re: [Snort-devel] snort signature failed to prevent attack in inline mode
From: Edward Borgoyn <eborgoyn () sourcefire com>
Date: Mon, 30 Sep 2013 13:13:53 -0400
Hello Mitesh, Thank you for your inquiry regarding SMTP handling within Snort. Do you have a pcap file that you can send to assist with our assessment of the situation? We believe the issue is with a limitation of the SMTP stream flushing implementation. There is an existing bug report that is aimed at improving the SMTP stream flushing functionality and hence IPS capability. Best Regards, Ed On Sat, Sep 28, 2013 at 2:17 AM, Mitesh Jadia <mitesh.jadia () gmail com>wrote:
Hello, I have one smtp based attack which is encode in format uuencode. Server Response is in one single packet. But As per I know smtp preprocessor is working only on reassembled packets. So when client gives ACK of this malicious packet, server side of stream is reassembled and I get decoded data of server response. So in this case, snort is only able to detect this attack not to prevent. How I should take care of this scenario. Regards, Mitesh Jadia ------------------------------------------------------------------------------ October Webinars: Code for Performance Free Intel webinars can help you accelerate application performance. Explore tips for MPI, OpenMP, advanced profiling, and more. Get the most from the latest Intel processors and coprocessors. See abstracts and register > http://pubads.g.doubleclick.net/gampad/clk?id=60133471&iu=/4140/ostg.clktrk _______________________________________________ Snort-devel mailing list Snort-devel () lists sourceforge net https://lists.sourceforge.net/lists/listinfo/snort-devel Archive: http://sourceforge.net/mailarchive/forum.php?forum_name=snort-devel Please visit http://blog.snort.org for the latest news about Snort!
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Current thread:
- snort signature failed to prevent attack in inline mode Mitesh Jadia (Sep 27)
- Re: [Snort-devel] snort signature failed to prevent attack in inline mode Edward Borgoyn (Sep 30)