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<a href="https://gitlab.com/GOODPWDCETCSZ">GOODPWDCETCSZ</a> created an issue <a href="https://gitlab.com/gnutls/gnutls/-/issues/1163">#1163</a>:
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<a id="user-content-description-of-problem" class="anchor" href="#description-of-problem" aria-hidden="true"></a>Description of problem:</h2>
<p dir="auto">GnuTLS appects a cert with critical issuerAltName. However, OpenSSL, mbedTLS, wolfSSL, and NSS reject it. According to RFC 5280, the ext issuerAltName should be marked as non-critical.</p>
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<a id="user-content-version-of-gnutls-used" class="anchor" href="#version-of-gnutls-used" aria-hidden="true"></a>Version of gnutls used:</h2>
<p dir="auto">3.5.5, 3.6.13</p>
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<a id="user-content-distributor-of-gnutls-eg-ubuntu-fedora-rhel" class="anchor" href="#distributor-of-gnutls-eg-ubuntu-fedora-rhel" aria-hidden="true"></a>Distributor of gnutls (e.g., Ubuntu, Fedora, RHEL)</h2>
<p dir="auto">Ubuntu x64</p>
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<a id="user-content-how-reproducible" class="anchor" href="#how-reproducible" aria-hidden="true"></a>How reproducible:</h2>
<p dir="auto">Steps to Reproduce:</p>
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<li><code>certtool -i --infile seed-73s19-723s32 .pem</code></li>
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<a id="user-content-actual-results" class="anchor" href="#actual-results" aria-hidden="true"></a>Actual results:</h2>
<pre class="code highlight js-syntax-highlight plaintext" lang="plaintext" v-pre="true"><code><span id="LC1" class="line" lang="plaintext">Chain verification output: Verified. The certificate is trusted. </span></code></pre>
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<a id="user-content-expected-results" class="anchor" href="#expected-results" aria-hidden="true"></a>Expected results:</h2>
<p dir="auto">The cert is rejected due to its critical issuerAltName.</p>
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<a id="user-content-attachement" class="anchor" href="#attachement" aria-hidden="true"></a>Attachement</h2>
<p dir="auto"><a href="https://gitlab.com/gnutls/gnutls/uploads/3735b2a160f0ef1b93ce3cf24203660e/seed-73s19-723s32.zip" data-link="true" class="gfm">seed-73s19-723s32.zip</a></p>
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