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<a href="https://gitlab.com/asosedkin">Alexander Sosedkin</a>
<a href="https://gitlab.com/gnutls/gnutls/-/issues/1711#note_2506061901">commented</a>:
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<p style="color: inherit; line-height: 1.5; margin: 0;">This may allow a Man-in-the-Middle (MitM) attack if hostname verification is improperly implemented or omitted.</p>
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<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">Were the reality any bit as apocalyptic as you paint it, you should've then marked the report as security sensitive.</p>
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<p style="color: inherit; line-height: 1.5; margin: 0;">deepseek.py</p>
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<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">This is not the first time when your alleged reproducer is a python script that's effectively just a series of subprocess.run() invocations. Just write shell scripts.</p>
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<p style="color: inherit; line-height: 1.5; margin: 0;">The connection succeeds and the certificate is accepted</p>
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<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">No, it just plain does not. The connection fails with</p>
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<pre class="code highlight js-syntax-highlight language-plaintext" v-pre="true" style='display: block; font-size: 14px; color: #3a383f; line-height: 1.6em; overflow-x: auto; border-radius: .25rem; position: relative; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; word-break: break-all; word-wrap: break-word; background-color: #fbfafd; margin: 0 0 1rem; padding: 12px; border: 1px solid #dcdcde;'><code style='font-size: inherit; color: inherit; word-wrap: normal; word-break: keep-all; border-radius: .25rem; background-color: inherit; white-space: pre; margin-top: 0; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; overflow-wrap: normal; padding: unset;'><span id="LC1" class="line" lang="plaintext" style="margin-top: 0;">- Status: The certificate is NOT trusted. The signature in the certificate is invalid. The name in the certificate does not match the expected.</span>
<span id="LC2" class="line" lang="plaintext">*** PKI verification of server certificate failed...</span>
<span id="LC3" class="line" lang="plaintext">*** Fatal error: Error in the certificate.</span>
<span id="LC4" class="line" lang="plaintext">* Received alert '42': Certificate is bad.</span>
<span id="LC5" class="line" lang="plaintext">Error in handshake: A TLS fatal alert has been received.</span></code></pre>
<copy-code></copy-code><insert-code-snippet></insert-code-snippet>
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<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">Tested on RHEL 8, RHEL 9, RHEL 10, Fedora 42, Ubuntu 24.04 (gnutls 3.8.3) and Ubuntu 22.04 (gnutls 3.7.3), which is three years old at this point.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">Why are you looking for <code style='font-size: 90%; color: #18171d; word-wrap: break-word; border-radius: .25rem; background-color: #ececef; margin-top: 0; font-weight: inherit; white-space: break-spaces; word-break: break-all; font-family: "GitLab Mono", "JetBrains Mono", "Menlo", "DejaVu Sans Mono", "Liberation Mono", "Consolas", "Ubuntu Mono", "Courier New", "andale mono", "lucida console", monospace; font-variant-ligatures: none; overflow-wrap: break-word; padding: 0.125rem 0.25rem;'>Verification failed</code> is beyond me.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">Why are you looking for it in stdout instead of stderr is beyond me.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">Why do you jump to conclusions that the connection has been established is beyond me.</p>
<p dir="auto" style="color: #3a383f; margin: 0 0 1rem;" align="initial">And if your report and/or your alleged reproducer has been generated by an LLM, in full or in part, please just stop doing whatever you're doing and never do that again.</p>
<p dir="auto" style="color: #3a383f; margin: 0;" align="initial">This is not your first frivolous report. Please kindly abstain from reporting non-issues.</p>
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