Resolve CVE-2026-34478 by forcing log4j-core to 2.25.4#1712
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KashKondaka wants to merge 1 commit intoopensearch-project:2.11from
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Resolve CVE-2026-34478 by forcing log4j-core to 2.25.4#1712KashKondaka wants to merge 1 commit intoopensearch-project:2.11from
KashKondaka wants to merge 1 commit intoopensearch-project:2.11from
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Details: Apache Log4j Core's Rfc5424Layout, in versions 2.21.0 through 2.25.3, is vulnerable to log injection via CRLF sequences due to undocumented renames of security-relevant configuration attributes. Two distinct issues affect users of stream-based syslog services who configure Rfc5424Layout directly: - The newLineEscape attribute was silently renamed, causing newline escaping to stop working for users of TCP framing (RFC 6587), exposing them to CRLF injection in log output. - The useTlsMessageFormat attribute was silently renamed, causing users of TLS framing (RFC 5425) to be silently downgraded to unframed TCP (RFC 6587), without newline escaping. Users of the SyslogAppender are not affected, as its configuration attributes were not modified. Impact: Apache Log4j Core's Rfc5424Layout, in versions 2.21.0 through 2.25.3, is vulnerable to log injection via CRLF sequences due to undocumented renames of security-relevant configuration attributes. Fix: Added force directive for org.apache.logging.log4j:log4j-core:2.25.4 in the Gradle resolutionStrategy block. Version 2.25.4 corrects the renamed attributes and restores proper CRLF escaping and TLS framing behavior. Signed-off-by: KashKondaka <37753523+KashKondaka@users.noreply.github.com>
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Summary
Resolves CVE-2026-34478 (MEDIUM severity) by adding a
forcedirective fororg.apache.logging.log4j:log4j-core:2.25.4in the GradleresolutionStrategyblock.Details
Apache Log4j Core's Rfc5424Layout, in versions 2.21.0 through 2.25.3, is vulnerable to log injection via CRLF sequences due to undocumented renames of security-relevant configuration attributes. Two distinct issues affect users of stream-based syslog services who configure Rfc5424Layout directly:
newLineEscapeattribute was silently renamed, causing newline escaping to stop working for users of TCP framing (RFC 6587), exposing them to CRLF injection in log output.useTlsMessageFormatattribute was silently renamed, causing users of TLS framing (RFC 5425) to be silently downgraded to unframed TCP (RFC 6587), without newline escaping.Users of the SyslogAppender are not affected, as its configuration attributes were not modified.
Impact
Apache Log4j Core's Rfc5424Layout, in versions 2.21.0 through 2.25.3, is vulnerable to log injection via CRLF sequences due to undocumented renames of security-relevant configuration attributes.
Fix
force "org.apache.logging.log4j:log4j-core:2.25.4"to the GradleresolutionStrategyblock inbuild.gradleTest Plan
log4j-coreresolves to2.25.4in dependency tree