{"id":791,"date":"2013-04-26T23:00:24","date_gmt":"2013-04-26T21:00:24","guid":{"rendered":"https:\/\/kbyte.snowpenguin.org\/blog\/?p=791"},"modified":"2020-09-27T00:40:10","modified_gmt":"2020-09-26T22:40:10","slug":"kippo-protocol-mismatch-workaround-2","status":"publish","type":"post","link":"https:\/\/kbyte.snowpenguin.org\/blog\/en\/2013\/04\/26\/kippo-protocol-mismatch-workaround-2\/","title":{"rendered":"Kippo: &#8220;Protocol mismatch&#8221; workaround"},"content":{"rendered":"\n<p>A low interaction honeypot (as <a href=\"https:\/\/code.google.com\/p\/kippo\/\" target=\"_blank\" rel=\"noopener noreferrer\">Kippo<\/a>) tries to mine a real service. Errors included.&nbsp;Unfortunately this is not always possible, which makes the trap detectable by human and some scan softwares.<\/p>\n\n\n\n<p>Kippo uses&nbsp;<a href=\"http:\/\/twistedmatrix.com\/trac\/\" target=\"_blank\" rel=\"noopener noreferrer\">Twisted<\/a>&nbsp;conch,&nbsp;which doesn&#8217;t act always like a real OpenSSH server. One of the major issues is related to malformed data at connection that can disclose Kippo easily because Twisted responds to the client with:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>[protocolbytes] bad packet length [protocolbytes]<\/p><\/blockquote>\n\n\n\n<p>With a real OpenSSH server, the client receives only this message:<\/p>\n\n\n\n<blockquote class=\"wp-block-quote\"><p>Protocol mismatch.<\/p><\/blockquote>\n\n\n\n<p>But don&#8217;t worry (be happy), you will not be detected again! Apply this patch and the &#8220;bad response&#8221; will be intercepted and substituted with the right message.It&#8217;s just a workaround, but it works!<\/p>\n\n\n\n<p><a href=\"https:\/\/kbyte.snowpenguin.org\/blog\/2013\/04\/30\/kippo-protocol-mismatch-workaround\/kippo-r246-bpl-patch\/\" rel=\"attachment wp-att-283\">kippo-r246-bpl.patch<br><\/a><a href=\"https:\/\/kbyte.snowpenguin.org\/blog\/2013\/04\/30\/kippo-protocol-mismatch-workaround\/kippo-0-8-bpl-patch\/\" rel=\"attachment wp-att-282\">kippo-0.8-bpl.patch<\/a><\/p>\n\n\n\n<p>Happy hunting!<\/p>\n\n\n\n<figure class=\"wp-block-embed-youtube wp-block-embed is-type-video is-provider-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe loading=\"lazy\" title=\"World&#039;s worst hacker\" width=\"640\" height=\"360\" src=\"https:\/\/www.youtube.com\/embed\/oJagxe-Gvpw?feature=oembed&#038;enablejsapi=1&#038;origin=https:\/\/kbyte.snowpenguin.org\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture\" allowfullscreen><\/iframe>\n<\/div><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>A low interaction honeypot (as Kippo) tries to mine a real service. Errors included.&nbsp;Unfortunately this is not always possible, which makes the trap detectable by human and some scan softwares. Kippo uses&nbsp;Twisted&nbsp;conch,&nbsp;which doesn&#8217;t act always like a real OpenSSH server. One of the major issues is related to malformed data at connection that can disclose [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[176],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v23.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Kippo: &quot;Protocol mismatch&quot; workaround - Kbyte@Snowpenguin<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/kbyte.snowpenguin.org\/blog\/en\/2013\/04\/26\/kippo-protocol-mismatch-workaround-2\/\" \/>\n<meta property=\"og:locale\" content=\"it_IT\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kippo: &quot;Protocol mismatch&quot; workaround - Kbyte@Snowpenguin\" \/>\n<meta property=\"og:description\" content=\"A low interaction honeypot (as Kippo) tries to mine a real service. Errors included.&nbsp;Unfortunately this is not always possible, which makes the trap detectable by human and some scan softwares. Kippo uses&nbsp;Twisted&nbsp;conch,&nbsp;which doesn&#8217;t act always like a real OpenSSH server. One of the major issues is related to malformed data at connection that can disclose [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/kbyte.snowpenguin.org\/blog\/en\/2013\/04\/26\/kippo-protocol-mismatch-workaround-2\/\" \/>\n<meta property=\"og:site_name\" content=\"Kbyte@Snowpenguin\" \/>\n<meta property=\"article:published_time\" content=\"2013-04-26T21:00:24+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2020-09-26T22:40:10+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/kbyte.snowpenguin.org\/blog\/wp-content\/uploads\/2014\/11\/snowpenguin-blogo.png\" \/>\n\t<meta property=\"og:image:width\" content=\"150\" \/>\n\t<meta property=\"og:image:height\" content=\"150\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/png\" \/>\n<meta name=\"author\" content=\"Kbyte\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@kbytesys\" \/>\n<meta name=\"twitter:site\" content=\"@kbytesys\" \/>\n<meta name=\"twitter:label1\" content=\"Scritto da\" \/>\n\t<meta name=\"twitter:data1\" content=\"Kbyte\" \/>\n\t<meta name=\"twitter:label2\" content=\"Tempo di lettura stimato\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minuto\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/kbyte.snowpenguin.org\/blog\/en\/2013\/04\/26\/kippo-protocol-mismatch-workaround-2\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/kbyte.snowpenguin.org\/blog\/en\/2013\/04\/26\/kippo-protocol-mismatch-workaround-2\/\"},\"author\":{\"name\":\"Kbyte\",\"@id\":\"https:\/\/kbyte.snowpenguin.org\/blog\/#\/schema\/person\/f3113c5247622ffcdd4e830ed842a7e4\"},\"headline\":\"Kippo: &#8220;Protocol mismatch&#8221; 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