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Groups > linux.debian.security > #5759

Re: debcheckroot v2.0 released

From Elmar Stellnberger <estellnb@gmail.com>
Newsgroups linux.debian.security
Subject Re: debcheckroot v2.0 released
Date 2020-03-04 20:50 +0100
Message-ID <zGIbL-B4-5@gated-at.bofh.it> (permalink)
References (11 earlier) <z6kSJ-6z-3@gated-at.bofh.it> <z73mN-3UW-1@gated-at.bofh.it> <zpA0W-4rq-9@gated-at.bofh.it> <zpCcq-5F7-7@gated-at.bofh.it> <zGHIK-rn-5@gated-at.bofh.it>
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It would be a question if anyone has tried to download a SHA512SUMS file 
from cdimage.debian.org with atea? As it turned out downloading this 
file with tails/tor is NOT sufficient. I have verified a Debian Live 
10.1.0 DVD image against the Debian 10.1.0 Install BD-DL I have. 
Debcheckroot reported several infected packages like mkinitramfs, ispell 
and several pam-modules though mounting the squashfs may already have 
triggered some malware.

Yours Sincerely
Elmar Stellnberger



Am 04.03.20 um 20:04 schrieb Elmar Stellnberger:
> Hi folks
> 
>    You can now download the indicated program at 
> https://www.elstel.org/atea/ and read some documentation at 
> https://www.elstel.org/DANE/.
> 
> Kind Regards,
> Elmar
> 
> Am 17.01.20 um 16:52 schrieb Elmar Stellnberger:
>> Hi Cindy Sue! Hi folks!
>>
>>    I must confess there is little you can do about missing emails with 
>> debcheckroot. You can spot rootkits with hindsight but intelligence 
>> can also break in and go without leaving any trace. What would to my 
>> mind be necessary for a more secure email communication is a better 
>> penetration of DANE. Many CAs are known to issue rogue certificates to 
>> secret services so the public key is the only thing that may be 
>> trustworthy of a certificate. If that public key is signed and bound 
>> to a domain with DNSSEC (this is then called DANE) it shall be safe. I 
>> would guess that email dispatching was safe if encrypted and saved by 
>> DANE all the way to its target. F.i. it seems likely that intelligence 
>> just tries to halt email delivery if some suspicious email is in the 
>> queue until they have assessed what they wanna do about it. And it is 
>> questionable how those emails which seem to be sent successfully but 
>> which do not reach their target get lost.
>>
>>     Something I as an end user can do about the emailing problem is to 
>> write and send my emails on a secure machine. If I am using webmail or 
>> an emailing program this requires to preconfigure certificates known 
>> to be safe and to only allow these. All CAs need to be disabled since 
>> the average user will never know which CAs issue rogue certificates. 
>> According to my knowledge any simple web page invocation immediately 
>> results in a cracked system if it is using a spoofed certificate which 
>> can not be excluded for any simple web search. Luckily my hoster 
>> provides DANE for the machines used for email delivery, webmailing and 
>> my website configuration panel. And I am still using a Debian 8 read 
>> only stick to boot such a secure system.
>>
>>     Why the hell Debian 8? Isn`t that insecure? I believe it isn`t as 
>> long as I only visit these two web pages of my hoster. Unfortunately 
>> newer versions of Firefox have a special implementation for so called 
>> HSTS (http strict transport security) certificates. You can not add a 
>> security exception for such a certificate but you need to configure 
>> all dependent certification authorities for such a certificate. 
>> However with the first CA you acknowledge you compromise your system`s 
>> security. Older versions of Firefox did not have this bug: 
>> https://bugzilla.mozilla.org/show_bug.cgi?id=1606802
>>
>>    I am currently looking forward to test which versions of Debian 9 
>> would work. Firefox from Debian 10 does no more work. If you have good 
>> luck your webmailing server supports DANE but does not use HSTS. Then 
>> you can use a current Debian. With Debian 8 you simply need to delete 
>> libnssckbi.so from libnss3 to disable all default CAs. You can not 
>> delete them by hand. If you do you need to mark every singleton CA but 
>> that does not prevent all deleted CAs to reappear a second after you 
>> have deleted them. That is why you needed to delete the .so. With 
>> newer versions of Firefox deleting libnssckbi.so does not stay without 
>> side effects: You can then not acknowledge security exceptions by hand 
>> any more. I have written a script to do that automatically though and 
>> I am likely to publish it at https://www.elstel.org/DANE/ in the 
>> future if sufficient interest is given in the issue. Once I know the 
>> last good Firefox version I could also approach to resolve the bug 
>> from above for newer Firefox versions. Unfortunately Dana Keeler has 
>> given this bug a resolved invalid so that it is unsure whether they 
>> would accept the bugfix upstreams. According to Dana`s comments the 
>> bug should in deed be marked as WONTFIX. That would be correct. If you 
>> like vote or comment for/on this bug.
>>
>> Elmar
>>
>>
>> Am 17.01.20 um 14:29 schrieb Cindy Sue Causey:
>>> On 11/27/19, Elmar Stellnberger <estellnb@gmail.com> wrote:
>>>> Am 25.11.19 um 12:35 schrieb Patrick Schleizer:
>>>>> Yes, forget about NSA and alike. Let's not assume quasi-omnipotent
>>>>> attackers. That leads to defeatist mindset which isn't productive.
>>>>     I would not let myself be defeated easily. Who has thought about
>>>> emails in your inbox which are deleted before you can see them? Easily
>>>> doable. They would just need to know your password. Or about outgoing
>>>> emails which do not reach their target. As far as I have learnt to know
>>>> it you can see them in the sent folder but they never appear on the
>>>> other side, not even in the spam-box. The worse thing is however if
>>>> someone wants to contact you and you do not even know about it, the
>>>> other one just thinking you did not reply.
>>>
>>> There have been two situations that, no, I can't name just this
>>> second, so this is anecdotal material *until I stumble back upon* the
>>> very real cases, BUT...
>>>
>>> Twice in the last maybe six months, there has been chatter about the
>>> receiving end's server(s) stopping the flow of incoming emails for
>>> unknown reasons. The occurrences were purely "glitches", NOT on
>>> purpose. It was either machine failure or accidentally
>>> Human-instigated mis-code or something that provoked the situations.
>>>
>>> End users found out when a sudden flood of sometimes OLD email
>>> suddenly hit their email inboxes. The last one was just in last few
>>> weeks. If and when I re-encounter that information, I'll post for
>>> posterity. :)
>>>
>>> As for the once formerly viewed and then now missing emails, been
>>> there, done there. Things being what they are in my own #Life, I've
>>> most definitely... "wondered" how the emails "disappeared" when they
>>> are NOT something I would have EVER deleted. It affects very few, less
>>> than a handful of correspondences.
>>>
>>> Sanity is found in realizing I have a VERY LARGE inbox.. and I'm
>>> surely just not using the right words for my queries. I've convinced
>>> myself that I'm using words that convey the same thoughts as the
>>> original messages but are not a search string-friendly match for the
>>> specific words that were originally written. :)
>>>
>>> Cindy :)

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Thread

Have I caught a firmware attack in the act? Or am I just paranoid? "Rebecca N. Palmer" <rebecca_palmer@zoho.com> - 2019-08-13 09:40 +0200
  Re: Have I caught a firmware attack in the act? Or am I just paranoid? Paul Wise <pabs@debian.org> - 2019-08-14 07:10 +0200
  Re: Have I caught a firmware attack in the act? Or am I just  paranoid? Elmar Stellnberger <estellnb@gmail.com> - 2019-08-14 17:40 +0200
    Re: Have I caught a firmware attack in the act? Or am I just  paranoid? "Rebecca N. Palmer" <rebecca_palmer@zoho.com> - 2019-08-15 23:20 +0200
      Re: Have I caught a firmware attack in the act? Or am I just  paranoid? Davide Prina <davide.prina@gmail.com> - 2019-08-16 10:40 +0200
        Re: Have I caught a firmware attack in the act? Or am I just  paranoid? CMH <chouck@binghamton.edu> - 2019-08-16 14:20 +0200
        Re: Have I caught a firmware attack in the act? Or am I just paranoid? Andrei Grosu <andrei_grosu@fastmail.net> - 2019-08-16 19:20 +0200
        Re: Have I caught a firmware attack in the act? Or am I just  paranoid? Elmar Stellnberger <estellnb@gmail.com> - 2019-08-16 19:20 +0200
      Re: Have I caught a firmware attack in the act? Or am I just  paranoid? Elmar Stellnberger <estellnb@gmail.com> - 2019-08-16 19:10 +0200
      Re: Have I caught a firmware attack in the act? Or am I just  paranoid? Elmar Stellnberger <estellnb@gmail.com> - 2019-08-16 19:30 +0200
      Re: Have I caught a firmware attack in the act? Or am I just  paranoid? Elmar Stellnberger <estellnb@gmail.com> - 2019-08-16 21:20 +0200
        Re: Have I caught a firmware attack in the act? Or am I just  paranoid? "Rebecca N. Palmer" <rebecca_palmer@zoho.com> - 2019-08-17 11:50 +0200
          Re: Have I caught a firmware attack in the act? Or am I just  paranoid? Elmar Stellnberger <estellnb@gmail.com> - 2019-08-17 13:20 +0200
            Re: Have I caught a firmware attack in the act? Or am I just  paranoid? "Rebecca N. Palmer" <rebecca_palmer@zoho.com> - 2019-08-23 09:30 +0200
              Re: Have I caught a firmware attack in the act? Or am I just  paranoid? Elmar Stellnberger <estellnb@gmail.com> - 2019-08-23 21:00 +0200
                debcheckroot v2.0 released Elmar Stellnberger <estellnb@gmail.com> - 2019-11-15 17:20 +0100
                Verified Boot, Secure Boot, dm-verity, debcheckroot Patrick Schleizer <adrelanos@riseup.net> - 2019-11-16 14:00 +0100
                Re: Verified Boot, Secure Boot, dm-verity, debcheckroot Elmar Stellnberger <estellnb@gmail.com> - 2019-11-16 15:30 +0100
                Re: Verified Boot, Secure Boot, dm-verity, debcheckroot Sylvain Beucler <beuc@beuc.net> - 2019-11-16 15:40 +0100
                Re: Verified Boot, Secure Boot, dm-verity, debcheckroot Elmar Stellnberger <estellnb@gmail.com> - 2019-11-16 15:40 +0100
                Re: debcheckroot v2.0 released Patrick Schleizer <adrelanos@riseup.net> - 2019-11-19 13:40 +0100
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@gmail.com> - 2019-11-20 12:30 +0100
                Re: debcheckroot v2.0 released Patrick Schleizer <adrelanos@riseup.net> - 2019-11-25 12:40 +0100
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@gmail.com> - 2019-11-25 18:00 +0100
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@gmail.com> - 2019-12-10 17:40 +0100
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@gmail.com> - 2019-11-27 12:10 +0100
                Re: debcheckroot v2.0 released Cindy Sue Causey <butterflybytes@gmail.com> - 2020-01-17 14:40 +0100
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@gmail.com> - 2020-01-17 17:00 +0100
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@gmail.com> - 2020-01-17 17:20 +0100
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@gmail.com> - 2020-03-04 20:20 +0100
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@gmail.com> - 2020-03-04 20:50 +0100
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@gmail.com> - 2020-03-04 21:00 +0100
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@gmail.com> - 2020-03-04 21:00 +0100
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@gmail.com> - 2020-03-23 17:10 +0100
                Re: debcheckroot v2.0 released Paul Wise <pabs@debian.org> - 2020-03-24 04:40 +0100
                Re: debcheckroot v2.0 released Paul Wise <pabs@debian.org> - 2020-03-24 11:20 +0100
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@elstel.org> - 2020-03-24 15:50 +0100
                Re: debcheckroot v2.0 released Paul Wise <pabs@debian.org> - 2020-03-25 03:00 +0100
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@elstel.org> - 2020-03-25 11:30 +0100
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@elstel.org> - 2020-03-26 11:10 +0100
                Re: debcheckroot v2.0 released "vince@vheuser.com" <vince@vheuser.com> - 2020-04-01 20:10 +0200
                Re: debcheckroot v2.0 released Paul Wise <pabs@debian.org> - 2020-04-02 02:00 +0200
                Re: debcheckroot v2.0 released Lewis Yarema <lewisyarema91@gmail.com> - 2020-04-02 11:20 +0200
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@elstel.org> - 2020-04-02 17:00 +0200
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@elstel.org> - 2020-04-03 13:40 +0200
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@elstel.org> - 2020-04-02 16:50 +0200
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@elstel.org> - 2020-04-04 09:50 +0200
                Re: debcheckroot v2.0 released William Gagnebé <william.gagnebe@gmail.com> - 2020-04-05 12:20 +0200
                Re: debcheckroot v2.0 released l0f4r0@tuta.io - 2020-04-05 12:30 +0200
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@elstel.org> - 2020-04-07 17:50 +0200
                Re: debcheckroot v2.0 released "Niall O'Reilly" <Niall.oReilly+lists@no8.be> - 2020-04-02 18:30 +0200
                Re: debcheckroot v2.0 released Lee <ler762@gmail.com> - 2020-04-02 21:00 +0200
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@elstel.org> - 2020-04-02 21:40 +0200
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@elstel.org> - 2020-04-03 13:50 +0200
                Re: debcheckroot v2.0 released Lee <ler762@gmail.com> - 2020-04-04 00:50 +0200
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@elstel.org> - 2020-04-04 09:40 +0200
                Re: debcheckroot v2.0 released Bjørn Mork <bjorn@mork.no> - 2020-04-14 09:30 +0200
                arbitrary code execution on unformatted usb stick Elmar Stellnberger <estellnb@elstel.org> - 2020-04-25 15:40 +0200
                Re: arbitrary code execution on unformatted usb stick Elmar Stellnberger <estellnb@elstel.org> - 2020-04-25 15:50 +0200
                Re: arbitrary code execution on unformatted usb stick Elmar Stellnberger <estellnb@elstel.org> - 2020-05-02 17:00 +0200
                Re: arbitrary code execution on unformatted usb stick Elmar Stellnberger <estellnb@elstel.org> - 2020-05-02 17:10 +0200
                Fwd: Re: arbitrary code execution on unformatted usb stick estellnb@elstel.org - 2020-05-02 20:50 +0200
                Re: debcheckroot v2.0 released Elmar Stellnberger <estellnb@gmail.com> - 2020-03-21 17:40 +0100
      Probably a false alarm Re: Have I caught a firmware attack in the  act? Or am I just paranoid? "Rebecca N. Palmer" <rebecca_palmer@zoho.com> - 2019-08-24 18:50 +0200

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