2022-12-20 02:19:21 +00:00
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<!-- Inferencium - Website - Blog - #1 -->
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2023-05-19 06:04:03 +01:00
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<!-- Copyright 2022 Jake Winters -->
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2022-12-20 02:19:21 +00:00
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2023-06-22 21:15:02 +01:00
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2022-12-20 02:19:21 +00:00
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<title>Inferencium - Blog - systemd Insecurity</title>
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2022-12-20 04:53:45 +00:00
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2022-12-20 02:19:21 +00:00
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2022-12-26 07:40:16 +00:00
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2022-12-20 02:19:21 +00:00
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<a class="title">Inferencium</a><br>
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2023-01-13 22:01:33 +00:00
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2022-12-20 02:19:21 +00:00
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<body>
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2023-03-13 14:32:41 +00:00
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<h1>Blog - #1</h1>
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2023-03-13 14:47:54 +00:00
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<h2>systemd Insecurity</h2>
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<p class="update_date">Posted: 2022-01-29 (UTC+00:00)</p>
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<p class="update_date">Updated: 2022-11-14 (UTC+00:00)</p>
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<!-- Table of contents. -->
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<h2 id="toc"><a href="#toc" class="h2"
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>Table of Contents<a/></h2>
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<ul>
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<li><a href="#issue0" class="body-link"
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>Issue #0 - Against CVE Assignment</a></li>
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<li><a href="#issue1" class="body-link"
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>Issue #1 - CVEs Are Not Useful</a></li>
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<li><a href="#issue2" class="body-link"
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>Issue #2 - Security is a Circus</a></li>
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<li><a href="#issue3" class="body-link"
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>Issue #3 - Blaming the User</a></li>
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</ul>
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<p>Anyone who cares about security may want to switch from systemd as soon as possible; its lead
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developer doesn't care about your security at all.</p>
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<h2 id="issue0"><a href="#issue0" class="h2"
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>Issue #0 - Against CVE Assignment</a></h2>
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<br>
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2023-06-05 00:18:11 +01:00
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<blockquote>"You don't assign CVEs to every single random bugfix we do, do you?"</blockquote>
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2023-06-05 00:07:29 +01:00
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<p>- Lennart Poettering, systemd lead developer</p>
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2023-03-13 14:47:54 +00:00
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<p>My thoughts:<br>
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Yes, if they're security-related.</p>
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<p>Source:<br>
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<a class="body-link" href="https://github.com/systemd/systemd/pull/5998#issuecomment-303782334"
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>systemd GitHub Issue 5998</a></p>
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<h2 id="issue1"><a href="#issue1" class="h2"
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>Issue #1 - CVEs Are Not Useful</a></h2>
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2023-06-05 00:18:11 +01:00
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<blockquote>"Humpf, I am not convinced this is the right way to announce this. We never did that, and half the
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2023-03-13 14:47:54 +00:00
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CVEs aren't useful anyway, hence I am not sure we should start with that now, because it is either
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inherently incomplete or blesses the nonsensical part of the CVE circus which we really shouldn't
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2023-06-05 00:18:11 +01:00
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bless..."</blockquote>
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2023-06-05 00:07:29 +01:00
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<p>- Lennart Poettering, systemd lead developer</p>
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2023-03-13 14:47:54 +00:00
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<p>My thoughts:<br>
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CVEs are supposed to be for security, and a log of when they were found and their severity, so yes,
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it *is* the correct way to announce it. It seems as if over 95 security-concious people think the
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same.</p>
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<p>Source:<br>
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<a class="body-link" href="https://github.com/systemd/systemd/pull/6225#issuecomment-311739869"
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>systemd GitHub Issue 6225</a></p>
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<h2 id="issue2"><a href="#issue2" class="h2">
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Issue #2 - Security is a Circus</a></h2>
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2023-06-05 00:18:11 +01:00
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<blockquote>"I am not sure I buy enough into the security circus to do that though for any minor
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issue..."</blockquote>
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2023-06-05 00:07:29 +01:00
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<p>- Lennart Poettering, systemd lead developer</p>
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2023-03-13 14:47:54 +00:00
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<p>Source:<br>
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<a class="body-link" href="https://github.com/systemd/systemd/issues/5144#issuecomment-276740654"
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>systemd GitHub Issue 5144</a></p>
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<h2 id="issue3"><a href="#issue3" class="h2"
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>Issue #3 - Blaming the User</a></h2>
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2023-06-05 00:18:11 +01:00
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<blockquote>"Yes, as you found out "0day" is not a valid username. I wonder which tool permitted you to create
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2023-03-13 14:47:54 +00:00
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it in the first place. Note that not permitting numeric first characters is done on purpose: to
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2023-06-05 00:07:29 +01:00
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avoid ambiguities between numeric UID and textual user names.
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2023-03-13 14:47:54 +00:00
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<br>
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systemd will validate all configuration data you drop at it, making it hard to generate invalid
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configuration. Hence, yes, it's a feature that we don't permit invalid user names, and I'd consider
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it a limitation of xinetd that it doesn't refuse an invalid username.<br>
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<br>
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So, yeah, I don't think there's anything to fix in systemd here. I understand this is annoying, but
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2023-06-05 00:18:11 +01:00
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still: the username is clearly not valid."</blockquote>
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2023-06-05 00:07:29 +01:00
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<p>- Lennart Poettering, systemd lead developer</p>
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2023-03-13 14:47:54 +00:00
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<p>My thoughts:<br>
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systemd was the thing that allowed root access just because a username started with a number, then
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Poettering blamed the user.</p>
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<p>Source:<br>
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<a class="body-link" href="https://github.com/systemd/systemd/issues/6237#issuecomment-311900864"
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>systemd GitHub Issue 6237</a></p>
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2022-12-20 02:19:21 +00:00
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