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#2 TLS 1.3 Causes TCP Issue with Flask

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opened 3 years ago by gashapwn · 0 comments
gashapwn commented 3 years ago

When TLS 1.3 is enabled, requesting an image (such as lainsign.png) causes part of the image to load and then the connection becomes stuck. The TCP connection stays alive but sends no more packets with data in them.

This only happens for some clients.

This seems to be related to MTU / SSL / the OpenBSD TCP implementation.

TLS 1.3 is currently disabled and TLS 1.2 is used, but this bug should be fixed and TLS 1.3 re-enabled.

When TLS 1.3 is enabled, requesting an image (such as lainsign.png) causes part of the image to load and then the connection becomes stuck. The TCP connection stays alive but sends no more packets with data in them. This only happens for some clients. This seems to be related to MTU / SSL / the OpenBSD TCP implementation. TLS 1.3 is currently disabled and TLS 1.2 is used, but this bug should be fixed and TLS 1.3 re-enabled.
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