Cherry-pick #8772 to 6.x: Support parsing TLS 1.3 supported_versions extension (#8647) #8824
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…lastic#8772) This adds support for the new TLS version negotiation mechanism introduced in TLS 1.3. It relies on a new extension: `supported_versions`. When this extension is used in the CLIENT_HELLO message, it features a list of versions the client is willing to use: ``` "supported_versions": [ "TLS 1.3", "TLS 1.2", "TLS 1.1", "TLS 1.0" ], ``` If the server supports the extension, it will pick one of the offered versions and include it in the SERVER_HELLO message: ``` "supported_versions": "TLS 1.3", ``` The TLS parser will report a new field, `tls.version`, that is the TLS version that has been selected after negotiation, either using the new negotiation introduced in TLS 1.3 or the legacy negotiation mechanism that used the version field in HELLO messages. Updated the TLS dashboard to use the new version field: - Server version visualization changed to TLS Version - Client version is not useful anymore, replaced by tls.server_certificate.public_key_size Fixes elastic#8647 (cherry picked from commit 51c1aa2)
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andrewkroh
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Cherry-pick of PR #8772 to 6.x branch. Original message:
This adds support for the new TLS version negotiation mechanism
introduced in TLS 1.3.
It relies on a new extension:
supported_versions. When thisextension is used in the CLIENT_HELLO message, it features
a list of versions the client is willing to use:
If the server supports the extension, it will pick one of the
offered versions and include it in the SERVER_HELLO message:
The TLS parser will report a new field,
tls.version, that is theTLS version that has been selected after negotiation, either using
the new negotiation introduced in TLS 1.3 or the legacy negotiation
mechanism that used the version field in HELLO messages.
Update TLS dashboard to use new version field …
tls.server_certificate.public_key_size
Fixes #8647