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cfcd1c61ef
This commit removes "TLSv1.1" from the list of default protocols in
Elasticsearch (starting with ES9.0)
TLSv1.1 has been deprecated by the IETF since March 2021
This affects a variety of TLS contexts, include
- The HTTP Server (Rest API)
- Transport protocol (including CCS and CCR)
- Outgoing connections for features that have configurable SSL
settings. This includes
- reindex
- watcher
- security realms (SAML, OIDC, LDAP, etc)
- monitoring exporters
- inference services
In practice, however, TLSv1.1 has been disabled in most Elasticsearch
deployments since around 7.12 because most JDK releases have disabled
TLSv1.1 (by default) starting in April 2021
That is, if you run a default installation of Elasticsearch (for any
currently supported version of ES) that uses the bundled JVM then
TLSv1.1 is already disabled.
And, since ES9+ requires JDK21+, all supported JDKs ship with TLSv1.1
disabled by default.
In addition, incoming HTTP connections to Elastic Cloud deployments
have required TLSv1.2 or higher since April 2020
This change simply makes it clear that Elasticsearch does not
attempt to enable TLSv1.1 and administrators who wish to use that
protocol will need to explicitly enable it in both the JVM and in
Elasticsearch.
Resolves: #108057
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