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  <section id="getting-into-the-routine">
<span id="phk-routine"></span><h1>Getting into the routine<a class="headerlink" href="#getting-into-the-routine" title="Link to this heading">¶</a></h1>
<p>Yesterday we released <a class="reference external" href="/security/VSV00009.html">VSV00009</a>, a pretty
harmless DoS from the backend side, which could trivially be mitigated
in VCL.</p>
<p>By now handling security issues seem to have become routine for the
project, which is good, because that is the world we live in, and
bad, because we live in a world where that is a necessary skill.</p>
<p>From the very start of the project, we have treated backends
as “trusted”, in the sense that a lot of nasty stuff we try to handle
from clients got “dont do that then” treatment from the backend.</p>
<p>That was back when “cloud” were called “mainframes” and “containers”
were called “jails”, way back when CDNs were only for companies
with more money than skill.</p>
<p>Part of the reasoning was also maximizing compatibility.</p>
<p>Backends were a lot more - let us call it “heterogenous” - back
then.  Some of them were literally kludges nailed to the side of
legacy newspaper production systems, and sometimes it was obvious
that they had not heard about RFCs.</p>
<p>For the problem we fixed yesterday, one line of VCL took care of
the problem, but that is not guaranteed to always be the case.</p>
<p>These days the “web” is a lot more regimented, and expecting
standards-compliance from backends makes sense, so we will
tighten the screws in that department as an ongoing activity.</p>
<p>Poul-Henning, 2022-08-05</p>
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