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CVE-2026-34477: Align SslConfiguration factory method usage with Log4j 2.12+ API - #4075
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This change updates the usage of `SslConfiguration#createSSLConfiguration` to the 4-parameter factory method introduced in Log4j 2.12.0. Using the newer factory method keeps the code aligned with the current API and ensures that all configuration parameters supported by recent Log4j versions are correctly propagated during SSL configuration creation. Fixes #4061
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Pull request overview
Updates Log4j Core’s SslConfiguration plugin factory wiring to ensure the verifyHostName attribute is recognized (aligning with the newer 4-parameter createSSLConfiguration factory), and adds tests/resources to validate hostname verification behavior.
Changes:
- Move
@PluginFactoryto the 4-parameterSslConfiguration#createSSLConfiguration(...)and deprecate the legacy 3-parameter overload. - Add test coverage verifying
verifyHostNameis recognized via plugin metadata and exercised via a TLS socket appender integration test. - Add BouncyCastle test dependency to generate test certificates/keystores.
Reviewed changes
Copilot reviewed 8 out of 8 changed files in this pull request and generated 4 comments.
Show a summary per file
| File | Description |
|---|---|
src/changelog/.2.x.x/4061_ssl-connection.xml |
Changelog entry for the fix. |
log4j-core/src/main/java/org/apache/logging/log4j/core/net/ssl/SslConfiguration.java |
Adjusts plugin factory method and deprecates old overload. |
log4j-core-test/src/test/resources/TlsSocketAppenderTest/log4j2.xml |
Adds TLS SocketAppender config exercising verifyHostName. |
log4j-core-test/src/test/java/org/apache/logging/log4j/core/net/ssl/SslConfigurationTest.java |
Adds a plugin-metadata-based test asserting verifyHostName is applied. |
log4j-core-test/src/test/java/org/apache/logging/log4j/core/appender/X509Certificates.java |
Test utility to generate X.509 material (via BouncyCastle). |
log4j-core-test/src/test/java/org/apache/logging/log4j/core/appender/TlsSocketAppenderTest.java |
New integration-style tests for hostname verification behavior. |
log4j-core-test/src/test/java/org/apache/logging/log4j/core/appender/LineReadingTcpServer.java |
Adds bind-address configurability to support new TLS tests. |
log4j-core-test/pom.xml |
Adds BouncyCastle test dependency/version management. |
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@ppkarwasz, I presume this enhancement will be shipped in |
Nevermind. This indeed fixes a bug. |
vy
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This reverts commit e59a1b2.
If a host does not resolve `*.localhost` to the loopback device as recommended by RFC 6761, there is no real way to test certificate validation.
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ppkarwasz
changed the title
SslConfiguration factory method usage with Log4j 2.12+ APISslConfiguration factory method usage with Log4j 2.12+ API
This change updates the usage of
SslConfiguration#createSSLConfigurationto the 4-parameter factory method introduced in Log4j 2.12.0.Using the newer factory method keeps the code aligned with the current API and ensures that all configuration parameters supported by recent Log4j versions are correctly propagated during SSL configuration creation.
Fixes #4061