Date: Sun, 28 Nov 2021 13:13:25 +0300 From: Mehmet Erol Sanliturk <m.e.sanliturk@gmail.com> To: Stefan Esser <se@freebsd.org> Cc: freebsd-hackers <freebsd-hackers@freebsd.org> Subject: Re: Does not appear to be (too) malicious ... Message-ID: <CAOgwaMspORHAcAKoXbgDEQ1ZFOjSHAJbpPYL67J1dVbYcPHgVA@mail.gmail.com> In-Reply-To: <b66c39a4-1836-eab8-db9f-e839d14b13be@freebsd.org> References: <cd41bda5-6a14-c4e2-3d74-b0c5d52480ec@zohomail.com> <05580cd8-1bbf-8783-b190-40d9cdacade6@m5p.com> <CA%2ByoEx881o6frd-zy-rV55xR3vg%2BjugN0ZigdH8nAYGsB6_NfA@mail.gmail.com> <b66c39a4-1836-eab8-db9f-e839d14b13be@freebsd.org>
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--00000000000067be0605d1d695b4 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable On Sun, Nov 28, 2021 at 12:17 PM Stefan Esser <se@freebsd.org> wrote: > Am 28.11.21 um 02:06 schrieb Mario Lobo: > > On Sat, Nov 27, 2021, 20:27 George Mitchell <george+freebsd@m5p.com> > wrote: > > > >> On 11/27/21 17:40, Obsto Clades via freebsd-hackers wrote: > >>> I hacked on the FreeBSD source code to produce a version of the OS th= at > >>> cannot be remotely hacked. Before you tell me that is impossible, I > >>> have an answer to that response on my FAQ page. > >>> > >>> If you are interested in checking out my OS, you can find instruction= s > >>> on my site's home page: https://obstoclades.tech/ > >>> > >>> I invite you to check it out. > >>> > >> > >> Hmm, my mother told me never to click on links in strange emails ... > >> -- George > >> > > > > curl http://obstoclades.tech > [...] > > <p class=3D"red">Connection denied by Geolocation Setting.</p> > > <p><b> Reason: </b> Blocked country: <font color=3D"red"> </fon= t> > </p> > > <p>The connection was denied because this country is blocked in > the > > Geolocation settings.</p> > > <p>Please contact your administrator for assistance.</p> > > </div> > > <div class=3D"band">WatchGuard Technologies, Inc.</div> > > </div> > > </body> > > </html> > > $ fetch --no-verify-peer -v -o /tmp/obstoclades.html > https://obstoclades.tech > resolving server address: obstoclades.tech:443 > SSL options: 82004854 > Verify hostname > TLSv1.3 connection established using TLS_AES_256_GCM_SHA384 > Certificate subject: /CN=3Dobstoclades.tech > Certificate issuer: /C=3DUS/O=3DLet's Encrypt/CN=3DR3 > requesting https://obstoclades.tech/ > fetch: https://obstoclades.tech: size of remote file is not known > local size / mtime: 34916 / 1638088913 > /tmp/obstoclades.html 34 kB 181 kBps 00s > > There is actual contents in this file, and it does not seem to contain an= y > malicious parts. It starts with: > > <!DOCTYPE html> > <!-- > File: ObstoClades.html > Copyright (c) 2021 Obsto Clades, LLC > --> > <html lang=3D"en"> > <head> > <meta charset=3D"UTF-8"> > <title>Security is a Joke</title> > <meta name=3D"description" > content=3D"This demonstrates a modified BSD Operating System > designed > to prevent remote hacking of single-purpose computer systems."> > <link rel=3D"stylesheet" type=3D"text/css" href=3D"/css/obstoclades.c= ss"/> > <link rel=3D"icon" type=3D"image/x-icon" href=3D"/favicon.ico"/> > <script > src=3D"https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js > "></script> > <script src=3D"js/obstoclades.js" defer=3D"defer"></script> > </head> > > And besides the jquery.min.js dowloaded from ajax.googleapis.com only the > following short and apparently benign script is downloaded as > obstoclades.js: > > /* > * File: obstoclades.js > * Copyright (c) 2017 Obsto Clades, LLC > */ > > $(document).ready(function() > { > var $content =3D $(".content").hide(); > $(".img").on("click", function (e) > { > $(this).parent().parent().toggleClass("expanded"); > var ttt =3D $(this).parent().children(".tooltiptext"); > if ($(this).parent().parent().hasClass("expanded")) > { > ttt.replaceWith("<span class=3D\"tooltiptext\">Click to > close</span>"); > } > else > { > ttt.replaceWith("<span class=3D\"tooltiptext\">Click to > open</span>"); > } > $(this).parent().parent().next().slideToggle(); > }); > var textHeight =3D $("#left-side-header-text").height(); > $("#old_english_sheepdog").height(textHeight).width(textHeight); > $("#button").click(function() > { > $("#contactus-form").submit(); > }) > }); > > He invites to attack his server using a SSH login with provided > credentials, > and offers US$1000 for any successful modification of the test server. Se= e > the following video, which shows that root on the consonle and root via s= u > in the SSH session get quite different environments: > > https://obstoclades.tech/video/demo-video.mp4 > > This looks like a setup with lots of restrictions applied, probably noexe= c > mounts of temporary file systems and the like, possibly jails and/or MAC > restrictions. > > He thinks that an embedded system configured that way could not be > attacked, > but explains that his concept is limited to e.g. IoT use cases (what he > calls "single-purpose computer system"). > > Anyway, I could not find any malicious content on the web server. Accessi= ng > with a SSH session (obviously configured to not allow backwards tunneling= ) > should also not be too dangerous from a dumb terminal (but beware of esca= pe > sequence attacks possible with ANSI terminals, e.g. reprogramming of > function > keys with "ESC[code;string;...p"). > > It looks to me like kind of a honeypot setup gathering attack attempts to > see whether a throw-away system can withstand them. All attack attempts a= re > logged, either to learn how to perform them, or to actually improve the > security of his protection concept in case of a successful break-in. > > Regards, STefan > The message above is really a very good one because of its information content . As a response to my message in the following link https://lists.freebsd.org/archives/freebsd-hackers/2021-November/000515.htm= l Obsto Clades asked me with a private message , approximately , " I am connecting to the web site ... without any such message . Do you have more information ? " . I replied , "No ." When the following link ( please notice that it is http , not https ) http://obstoclades.tech/ the response of Firefox ( 57.0.1) is the following : -------------------------------------------------------- Connection denied by Geolocation Setting. * Reason: * Blocked country: The connection was denied because this country is blocked in the Geolocation settings. Please contact your administrator for assistance. WatchGuard Technologies, Inc. -------------------------------------------------------- When the following link ( please notice that it is https , not http ) https://obstoclades.tech/video/demo-video.mp4 the response of Firefox ( 57.0.1) is the following : -------------------------------------------------------- Your connection is not secure The owner of obstoclades.tech has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website. Learn more=E2=80=A6 Report errors like this to help Mozilla identify and block malicious sites -------------------------------------------------------- In "Learn more ..." the linked page is https://support.mozilla.org/en-US/kb/error-codes-secure-websites?as=3Du&utm= _source=3Dinproduct How to troubleshoot security error codes on secure websites There are 2 knobs not copyable : (1) Go back (2) Advanced When "Advanced" is clicked ( there is no linked page ) , the following message is displayed : -------------------------------------------------------- obstoclades.tech uses an invalid security certificate. The certificate is not trusted because it is self-signed. The certificate is not valid for the name obstoclades.tech. Error code: SEC_ERROR_UNKNOWN_ISSUER -------------------------------------------------------- With a knob ( without any linked page ) as follows : "Add Exception ..." with an dialog pane display to add an exception for that page ( which I did not added because website owner may correct her/his certificate or configuration of the website ) . With my best wishes for all , Mehmet Erol Sanliturk --00000000000067be0605d1d695b4--
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