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<h1>Blog - #1</h1>
<h2>systemd Insecurity</h2>
<p class="update_date">Posted: 2022-01-29 (UTC+00:00)</p>
<p class="update_date">Updated: 2022-11-14 (UTC+00:00)</p>
<!-- Table of contents -->
<section id="toc">
<h2 id="toc"><a href="#toc">Table of Contents<a/></h2>
<ul>
<li><a href="#issue0">Issue #0 - Against CVE Assignment</a></li>
<li><a href="#issue1">Issue #1 - CVEs Are Not Useful</a></li>
<li><a href="#issue2">Issue #2 - Security is a Circus</a></li>
<li><a href="#issue3">Issue #3 - Blaming the User</a></li>
<li><a href="#issue-0">Issue #0 - Against CVE Assignment</a></li>
<li><a href="#issue-1">Issue #1 - CVEs Are Not Useful</a></li>
<li><a href="#issue-2">Issue #2 - Security is a Circus</a></li>
<li><a href="#issue-3">Issue #3 - Blaming the User</a></li>
</ul>
</section>
<p>Anyone who cares about security may want to switch from systemd as soon as possible; its lead
developer doesn't care about your security at all.</p>
<section id="issue0">
<h2 id="issue0"><a href="#issue0">Issue #0 - Against CVE Assignment</a></h2>
<br>
<blockquote>"You don't assign CVEs to every single random bugfix we do, do you?"</blockquote>
<p>Anyone who cares about security may want to switch from systemd as soon as possible;
its lead developer doesn't care about your security at all.</p>
<section id="issue-0">
<h2 id="issue-0"><a href="#issue-0">Issue #0 - Against CVE Assignment</a></h2>
<blockquote>"You don't assign CVEs to every single random bugfix we do, do
you?"</blockquote>
<p>- Lennart Poettering, systemd lead developer</p>
<p>My thoughts:<br>
Yes, if they're security-related.</p>
<p>Source:<br>
<p><b>My thoughts:</b> Yes, if they're security-related.</p>
<p>Source:
<a href="https://github.com/systemd/systemd/pull/5998#issuecomment-303782334">systemd GitHub Issue 5998</a></p>
</section>
<section id="issue1">
<h2 id="issue1"><a href="#issue1">Issue #1 - CVEs Are Not Useful</a></h2>
<blockquote>"Humpf, I am not convinced this is the right way to announce this. We never did that, and half the
CVEs aren't useful anyway, hence I am not sure we should start with that now, because it is either
inherently incomplete or blesses the nonsensical part of the CVE circus which we really shouldn't
<section id="issue-1">
<h2 id="issue-1"><a href="#issue-1">Issue #1 - CVEs Are Not Useful</a></h2>
<blockquote>"Humpf, I am not convinced this is the right way to announce this.
We never did that, and half the CVEs aren't useful anyway, hence I am not sure
we should start with that now, because it is either inherently incomplete or
blesses the nonsensical part of the CVE circus which we really shouldn't
bless..."</blockquote>
<p>- Lennart Poettering, systemd lead developer</p>
<p>My thoughts:<br>
CVEs are supposed to be for security, and a log of when they were found and their severity, so yes,
it *is* the correct way to announce it. It seems as if over 95 security-concious people think the
same.</p>
<p>Source:<br>
<p><b>My thoughts:</b> CVEs are supposed to be for security, and a log of when they
were found and their severity, so yes, it <em>is</em> the correct way to
announce it. It seems as if over 95 security-concious people think the same.</p>
<p>Source:
<a href="https://github.com/systemd/systemd/pull/6225#issuecomment-311739869">systemd GitHub Issue 6225</a></p>
</section>
<section id="issue2">
<h2 id="issue2"><a href="#issue2">Issue #2 - Security is a Circus</a></h2>
<blockquote>"I am not sure I buy enough into the security circus to do that though for any minor
issue..."</blockquote>
<section id="issue-2">
<h2 id="issue-2"><a href="#issue-2">Issue #2 - Security is a Circus</a></h2>
<blockquote>"I am not sure I buy enough into the security circus to do that
though for any minor issue..."</blockquote>
<p>- Lennart Poettering, systemd lead developer</p>
<p>Source:<br>
<p>Source:
<a href="https://github.com/systemd/systemd/issues/5144#issuecomment-276740654">systemd GitHub Issue 5144</a></p>
</section>
<section id="issue3">
<h2 id="issue3"><a href="#issue3">Issue #3 - Blaming the User</a></h2>
<blockquote>"Yes, as you found out "0day" is not a valid username. I wonder which tool permitted you to create
it in the first place. Note that not permitting numeric first characters is done on purpose: to
avoid ambiguities between numeric UID and textual user names.
<section id="issue-3">
<h2 id="issue-3"><a href="#issue-3">Issue #3 - Blaming the User</a></h2>
<blockquote>"Yes, as you found out "0day" is not a valid username. I wonder
which tool permitted you to create it in the first place. Note that not
permitting numeric first characters is done on purpose: to avoid ambiguities
between numeric UID and textual user names.<br>
<br>
systemd will validate all configuration data you drop at it, making it hard to generate invalid
configuration. Hence, yes, it's a feature that we don't permit invalid user names, and I'd consider
it a limitation of xinetd that it doesn't refuse an invalid username.<br>
systemd will validate all configuration data you drop at it, making it hard to
generate invalid configuration. Hence, yes, it's a feature that we don't permit
invalid user names, and I'd consider it a limitation of xinetd that it doesn't
refuse an invalid username.<br>
<br>
So, yeah, I don't think there's anything to fix in systemd here. I understand this is annoying, but
still: the username is clearly not valid."</blockquote>
So, yeah, I don't think there's anything to fix in systemd here. I understand
this is annoying, but still: the username is clearly not valid."</blockquote>
<p>- Lennart Poettering, systemd lead developer</p>
<p>My thoughts:<br>
systemd was the thing that allowed root access just because a username started with a number, then
Poettering blamed the user.</p>
<p>Source:<br>
<p><b>My thoughts:</b> systemd was the thing that allowed root access just because a
username started with a number, then Poettering blamed the user.</p>
<p>Source:
<a href="https://github.com/systemd/systemd/issues/6237#issuecomment-311900864">systemd GitHub Issue 6237</a></p>
</section>
</body>