Add TLS 1.2 breaking change #43582
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Add TLS 1.2 breaking change #43582
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gewarren
approved these changes
Nov 15, 2024
docs/core/compatibility/toc.yml
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Can you also add an entry on line 1263?
docs/core/compatibility/containers/8.0/default-ciphers-for-tls-changed.md
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Co-authored-by: Genevieve Warren <[email protected]>
bartonjs
reviewed
Nov 15, 2024
| description: Learn about the breaking change in containers where .NET 8 Debian container images no longer support TLS 1.2. | ||
| ms.date: 08/29/2024 | ||
| --- | ||
| # Debian 12 container images no longer support TLS 1.2 |
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Our default ciphersuite list allows any TLS 1.3 ciphersuite, and 8 TLS 1.2 ciphersuites.
The TLS 1.2 ciphersuites we allow aren't particularly esoteric, so it should be the case that we can, by default, talk to any TLS 1.2 endpoint.
Even if the default security level is non-zero, we still shouldn't be boxing out TLS 1.2:
$ openssl ciphers -s -stdname "ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256"
TLS_AES_256_GCM_SHA384 - TLS_AES_256_GCM_SHA384 TLSv1.3 Kx=any Au=any Enc=AESGCM(256) Mac=AEAD
TLS_CHACHA20_POLY1305_SHA256 - TLS_CHACHA20_POLY1305_SHA256 TLSv1.3 Kx=any Au=any Enc=CHACHA20/POLY1305(256) Mac=AEAD
TLS_AES_128_GCM_SHA256 - TLS_AES_128_GCM_SHA256 TLSv1.3 Kx=any Au=any Enc=AESGCM(128) Mac=AEAD
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 - ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(256) Mac=AEAD
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 - ECDHE-ECDSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(128) Mac=AEAD
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 - ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 - ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(128) Mac=AEAD
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 - ECDHE-ECDSA-AES256-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(256) Mac=SHA384
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 - ECDHE-ECDSA-AES128-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(128) Mac=SHA256
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 - ECDHE-RSA-AES256-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AES(256) Mac=SHA384
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 - ECDHE-RSA-AES128-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AES(128) Mac=SHA256
$ openssl ciphers -s -stdname "ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:@SECLEVEL=0"
TLS_AES_256_GCM_SHA384 - TLS_AES_256_GCM_SHA384 TLSv1.3 Kx=any Au=any Enc=AESGCM(256) Mac=AEAD
TLS_CHACHA20_POLY1305_SHA256 - TLS_CHACHA20_POLY1305_SHA256 TLSv1.3 Kx=any Au=any Enc=CHACHA20/POLY1305(256) Mac=AEAD
TLS_AES_128_GCM_SHA256 - TLS_AES_128_GCM_SHA256 TLSv1.3 Kx=any Au=any Enc=AESGCM(128) Mac=AEAD
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 - ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(256) Mac=AEAD
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 - ECDHE-ECDSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(128) Mac=AEAD
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 - ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 - ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(128) Mac=AEAD
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 - ECDHE-ECDSA-AES256-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(256) Mac=SHA384
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 - ECDHE-ECDSA-AES128-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(128) Mac=SHA256
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 - ECDHE-RSA-AES256-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AES(256) Mac=SHA384
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 - ECDHE-RSA-AES128-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AES(128) Mac=SHA256
$ openssl ciphers -s -stdname "ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:@SECLEVEL=2"
TLS_AES_256_GCM_SHA384 - TLS_AES_256_GCM_SHA384 TLSv1.3 Kx=any Au=any Enc=AESGCM(256) Mac=AEAD
TLS_CHACHA20_POLY1305_SHA256 - TLS_CHACHA20_POLY1305_SHA256 TLSv1.3 Kx=any Au=any Enc=CHACHA20/POLY1305(256) Mac=AEAD
TLS_AES_128_GCM_SHA256 - TLS_AES_128_GCM_SHA256 TLSv1.3 Kx=any Au=any Enc=AESGCM(128) Mac=AEAD
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 - ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(256) Mac=AEAD
TLS_ECDHE_ECDSA_WITH_AES_128_GCM_SHA256 - ECDHE-ECDSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(128) Mac=AEAD
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 - ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD
TLS_ECDHE_RSA_WITH_AES_128_GCM_SHA256 - ECDHE-RSA-AES128-GCM-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(128) Mac=AEAD
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 - ECDHE-ECDSA-AES256-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(256) Mac=SHA384
TLS_ECDHE_ECDSA_WITH_AES_128_CBC_SHA256 - ECDHE-ECDSA-AES128-SHA256 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(128) Mac=SHA256
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 - ECDHE-RSA-AES256-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AES(256) Mac=SHA384
TLS_ECDHE_RSA_WITH_AES_128_CBC_SHA256 - ECDHE-RSA-AES128-SHA256 TLSv1.2 Kx=ECDH Au=RSA Enc=AES(128) Mac=SHA256
$ openssl ciphers -s -stdname "ECDHE-ECDSA-AES256-GCM-SHA384:ECDHE-ECDSA-AES128-GCM-SHA256:ECDHE-RSA-AES256-GCM-SHA384:ECDHE-RSA-AES128-GCM-SHA256:ECDHE-ECDSA-AES256-SHA384:ECDHE-ECDSA-AES128-SHA256:ECDHE-RSA-AES256-SHA384:ECDHE-RSA-AES128-SHA256:@SECLEVEL=5"
TLS_AES_256_GCM_SHA384 - TLS_AES_256_GCM_SHA384 TLSv1.3 Kx=any Au=any Enc=AESGCM(256) Mac=AEAD
TLS_CHACHA20_POLY1305_SHA256 - TLS_CHACHA20_POLY1305_SHA256 TLSv1.3 Kx=any Au=any Enc=CHACHA20/POLY1305(256) Mac=AEAD
TLS_ECDHE_ECDSA_WITH_AES_256_GCM_SHA384 - ECDHE-ECDSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AESGCM(256) Mac=AEAD
TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384 - ECDHE-RSA-AES256-GCM-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AESGCM(256) Mac=AEAD
TLS_ECDHE_ECDSA_WITH_AES_256_CBC_SHA384 - ECDHE-ECDSA-AES256-SHA384 TLSv1.2 Kx=ECDH Au=ECDSA Enc=AES(256) Mac=SHA384
TLS_ECDHE_RSA_WITH_AES_256_CBC_SHA384 - ECDHE-RSA-AES256-SHA384 TLSv1.2 Kx=ECDH Au=RSA Enc=AES(256) Mac=SHA384That shows that OpenSSL 3.0.2 on Ubunutu 22.04 interprets our list as the same at the implicit security level, level 0, and level 2. By level 5 it is reduced, but still contains TLS 1.2 in the compatible protocols.
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What is true is that, by default, SSL3, TLS 1.0, and TLS 1.1 are all no longer supported.
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So, why do you think this results in a breaking change, then?
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In reference to dotnet/dotnet-docker#6039
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