Fix TCP TLS server SNI server name leak #5100
Merged
Conversation
This file contains bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
…e to SSL client resumption performed by the SSL implementation although we are using a new engine implementation. The SSL channel provider when a server name is specified for a client should use the SSL context map to avoid this.
…SslContext that is filled when a client provides a server name. When a server name does not resolve to a KeyManagerFactory or TrustManagerFactory, the default factories are used and the entry is stored in the map. Instead no specific factory is resolved the default Netty SslContext is used, since this can lead to a a memory leak when a client specifies spurious SNI server names. This affects only a TCP server when SNI is set in the HttpServerOptions.
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
The
SslChannelProviderclass maintains a map of server name to NettySslContextthat is filled when a client provides a server name. When a server name does not resolve to aKeyManagerFactoryorTrustManagerFactory, the default factories are used and the entry is stored in the map. Instead no specific factory is resolved the default NettySslContextis used, since this can lead to a a memory leak when a client specifies spurious SNI server names. This affects only a TCP server when SNI is set in theHttpServerOptions.In addition fix: the TCP client will not send the correct server name to the client due to SSL client resumption performed by the SSL implementation although we are using a new engine implementation.
Fixes CVE-2024-1300