mbedtls/ChangeLog.d/tls13-only-server.txt
Ronald Cron 53dff7b0af Do not forget about TLS 1.2 disabled at runtime aspect
Signed-off-by: Ronald Cron <ronald.cron@arm.com>
2024-03-07 16:01:51 +01:00

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Security
* When negotiating TLS version on server side, do not fallback to the
TLS 1.2 implementation of the protocol if it is not enabled.
- If the TLS 1.2 implementation was disabled at build time, a TLS 1.2
client was able to put the TLS 1.3-only server in an infinite loop
processing a TLS 1.2 ClientHello, resulting in a Denial of Service.
Reported by Matthias Mucha and Thomas Blattmann, SICK AG.
- If the TLS 1.2 implementation was disabled at runtime, a TLS 1.2 client
was able to successfully established a connection with the TLS 1.3-only
server. Reported by alluettiv on GitHub.