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      <title>RUSTSEC-2023-0052 — webpki: CPU denial of service in certificate path building</title>
      <link>https://vulnerability.circl.lu/vuln/rustsec-2023-0052</link>
      <description>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; crates.io: webpki&lt;/p&gt;
&lt;p&gt;When this crate is given a pathological certificate chain to validate, it will
spend CPU time exponential with the number of candidate certificates at each
step of path building.&lt;/p&gt;
&lt;p&gt;Both TLS clients and TLS servers that accept client certificate are affected.&lt;/p&gt;
&lt;p&gt;This was previously reported in
&amp;lt;https://github.com/briansmith/webpki/issues/69&amp;gt; and re-reported recently
by Luke Malinowski.&lt;/p&gt;
&lt;p&gt;webpki 0.22.1 included a partial fix and webpki 0.22.2 added further fixes.&lt;/p&gt;</description>
      <content:encoded>&lt;p&gt;&lt;strong&gt;Affected:&lt;/strong&gt; crates.io: webpki&lt;/p&gt;
&lt;p&gt;When this crate is given a pathological certificate chain to validate, it will
spend CPU time exponential with the number of candidate certificates at each
step of path building.&lt;/p&gt;
&lt;p&gt;Both TLS clients and TLS servers that accept client certificate are affected.&lt;/p&gt;
&lt;p&gt;This was previously reported in
&amp;lt;https://github.com/briansmith/webpki/issues/69&amp;gt; and re-reported recently
by Luke Malinowski.&lt;/p&gt;
&lt;p&gt;webpki 0.22.1 included a partial fix and webpki 0.22.2 added further fixes.&lt;/p&gt;</content:encoded>
      <guid isPermaLink="false">https://vulnerability.circl.lu/vuln/rustsec-2023-0052</guid>
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