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Re: [cross-project-issues-dev] (Mirror) security
|
Ed,
I get your point. However, Eclipse
running under my user account won't be able to alter my
executables in /usr/bin.
Installing some great looking plugin
from Marketplace could overwrite Eclipse jars that capture
credentials.
If it's possible to verify the signature
of mission-critical jars at startup, would it make sense to
offer it as an option (at the cost of slower startup) ?
Denis
On 2020-09-25 4:10 a.m., Ed Merks
wrote:
Denis,
If one has a rogue running process that can write arbitrarily
to your file system (or parts thereof), it could tamper anything,
so it would seem that at that point you would have arbitrary
security risks even without an Eclipse IDE. Even Windows
doesn't prevent a tampered or unsigned executable from running.
I don't think that Linux even has signed executables, given
there is no signing of such things in the Tycho builds.
Looking at this search:
https://www.google.com/search?q=java+run+only+signed+jars
and at answers like these:
https://stackoverflow.com/questions/54011270/allow-a-jar-to-run-only-if-it-is-signed
https://stackoverflow.com/questions/34641305/is-it-possible-to-force-jvm-to-check-that-every-jar-must-be-signed
suggests that it's not really so feasible to prevent Java from
running unsigned jars, though I expect from Thomas' answer that
OSGi can do verification with its specialized class loader
(though presumably that has a performance impact).
Running Java with a security manager enabled for the purpose of
running an IDE I think makes zero sense, so generally the IDE
can do anything and can itself be a rogue process (if and when
the user installs arbitrary things from the marketplace).
Even if the jars are verified, I can still personally think of
a number of ways that I could tamper data files used by the IDE
that would make the IDE "do bad things". I'll not outline the
possible ways that I can think of... :-P
I think a fundamental aspect (assumption?) of security is that
the machine itself is secure, sufficiently so that a process
that does rogue things never runs in the first place. Verifying
signatures and checksums ensures that only known content is
downloaded and installed in order to keep the machine secure.
Regards,
Ed
On 24.09.2020 19:53, Denis Roy wrote:
So it's possible for another process
to tamper with jars and have Eclipse run them blindly.
Do we know if that is industry
practice?
On 2020-09-24 12:07 p.m., Thomas
Watson wrote:
Yes, p2 verifies the signatures and content
of the JARs to confirm it hasn't been tampered with before
installing the JAR. At runtime the verification of JARs
is not enabled by default. Otherwise what you did would
have resulted in a runtime exception for the class you
changed.
Tom
-----
Original message -----
From: Wim Jongman <wim.jongman@xxxxxxxxx>
Sent by: cross-project-issues-dev-bounces@xxxxxxxxxxx
To: Cross project issues <cross-project-issues-dev@xxxxxxxxxxx>
Cc:
Subject: [EXTERNAL] [cross-project-issues-dev] (Mirror)
security
Date: Thu, Sep 24, 2020 10:18 AM
Hi,
This is probably a silly question but I was
wondering how we protect the content of jar files as
they are being pulled from mirrors all over the world.
Due to a recent break in the Platform class, I
compiled my own version of the Platform class where I
re-added the removed method. Then I replaced it in the
plugins/o.e.c.runtime jar using 7-zip.
This solved my issue but it also made me wonder how
this was protected if some mirror-server user used the
same hack to dope our jars.
I assume this is being done by p2 when downloading
the jar files by comparing some MDA hash?
Please enlighten me.
Cheers,
Wim
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--
Denis Roy
Director, IT Services | Eclipse Foundation, Inc.
Eclipse Foundation: The Platform for Open Innovation and Collaboration
Twitter: @droy_eclipse
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Denis Roy
Director, IT Services | Eclipse Foundation, Inc.
Eclipse Foundation: The Platform for Open Innovation and Collaboration
Twitter: @droy_eclipse